* installing *source* package ‘mlpack’ ...
** package ‘mlpack’ successfully unpacked and MD5 sums checked
** using staged installation
** libs
using C++ compiler: ‘Apple clang version 14.0.0 (clang-1400.0.29.202)’
using C++17
using SDK: ‘MacOSX11.3.sdk’
clang++ -arch arm64 -std=gnu++17 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppEnsmallen/include' -I/opt/R/arm64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2  -c RcppExports.cpp -o RcppExports.o
In file included from RcppExports.cpp:4:
In file included from ./../inst/include/mlpack.h:52:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:31:
In file included from ../inst/include/mlpack/core/data/load.hpp:26:
In file included from ../inst/include/mlpack/core/data/load_image.hpp:29:
../inst/include/stb/stb_image.h:1284:18: warning: unused function 'stbi_load_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1291:18: warning: unused function 'stbi_load_from_callbacks' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1299:18: warning: unused function 'stbi_load_gif_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1270:18: warning: unused function 'stbi_load_16_from_memory' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1277:18: warning: unused function 'stbi_load_16_from_callbacks' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1257:18: warning: unused function 'stbi_load_16' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16(char const *filename, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1333:16: warning: unused function 'stbi_loadf_from_memory' [-Wunused-function]
STBIDEF float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1340:16: warning: unused function 'stbi_loadf_from_callbacks' [-Wunused-function]
STBIDEF float *stbi_loadf_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1348:16: warning: unused function 'stbi_loadf' [-Wunused-function]
STBIDEF float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1436:16: warning: unused function 'stbi_hdr_to_ldr_gamma' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1/gamma; }
               ^
../inst/include/stb/stb_image.h:1437:16: warning: unused function 'stbi_hdr_to_ldr_scale' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1/scale; }
               ^
../inst/include/stb/stb_image.h:1430:16: warning: unused function 'stbi_ldr_to_hdr_gamma' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; }
               ^
../inst/include/stb/stb_image.h:1431:16: warning: unused function 'stbi_ldr_to_hdr_scale' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; }
               ^
../inst/include/stb/stb_image.h:1414:18: warning: unused function 'stbi_is_hdr_from_callbacks' [-Wunused-function]
STBIDEF int      stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user)
                 ^
../inst/include/stb/stb_image.h:1372:13: warning: unused function 'stbi_is_hdr_from_memory' [-Wunused-function]
STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:1386:18: warning: unused function 'stbi_is_hdr' [-Wunused-function]
STBIDEF int      stbi_is_hdr          (char const *filename)
                 ^
../inst/include/stb/stb_image.h:7293:13: warning: unused function 'stbi_info_from_memory' [-Wunused-function]
STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7300:13: warning: unused function 'stbi_info_from_callbacks' [-Wunused-function]
STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7307:13: warning: unused function 'stbi_is_16_bit_from_memory' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:7314:13: warning: unused function 'stbi_is_16_bit_from_callbacks' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *c, void *user)
            ^
../inst/include/stb/stb_image.h:7250:13: warning: unused function 'stbi_info' [-Wunused-function]
STBIDEF int stbi_info(char const *filename, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7271:13: warning: unused function 'stbi_is_16_bit' [-Wunused-function]
STBIDEF int stbi_is_16_bit(char const *filename)
            ^
../inst/include/stb/stb_image.h:4742:14: warning: unused function 'stbi_set_unpremultiply_on_load' [-Wunused-function]
STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply)
             ^
../inst/include/stb/stb_image.h:4747:14: warning: unused function 'stbi_convert_iphone_png_to_rgb' [-Wunused-function]
STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert)
             ^
../inst/include/stb/stb_image.h:999:14: warning: unused function 'stbi_set_flip_vertically_on_load' [-Wunused-function]
STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip)
             ^
../inst/include/stb/stb_image.h:4260:15: warning: unused function 'stbi_zlib_decode_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4281:13: warning: unused function 'stbi_zlib_decode_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, char const *ibuffer, int ilen)
            ^
../inst/include/stb/stb_image.h:4292:15: warning: unused function 'stbi_zlib_decode_noheader_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_noheader_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4308:13: warning: unused function 'stbi_zlib_decode_noheader_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen)
            ^
In file included from RcppExports.cpp:4:
In file included from ./../inst/include/mlpack.h:52:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:32:
In file included from ../inst/include/mlpack/core/data/save.hpp:24:
In file included from ../inst/include/mlpack/core/data/save_image.hpp:26:
../inst/include/stb/stb_image_write.h:1182:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/stb/stb_image_write.h:482:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:580:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:754:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/stb/stb_image_write.h:1514:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/stb/stb_image_write.h:266:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
35 warnings generated.
clang++ -arch arm64 -std=gnu++17 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppEnsmallen/include' -I/opt/R/arm64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2  -c adaboost.cpp -o adaboost.o
In file included from adaboost.cpp:9:
In file included from ../inst/include/mlpack/methods/adaboost/adaboost_main.cpp:34:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:31:
In file included from ../inst/include/mlpack/core/data/load.hpp:26:
In file included from ../inst/include/mlpack/core/data/load_image.hpp:29:
../inst/include/stb/stb_image.h:1284:18: warning: unused function 'stbi_load_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1291:18: warning: unused function 'stbi_load_from_callbacks' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1299:18: warning: unused function 'stbi_load_gif_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1270:18: warning: unused function 'stbi_load_16_from_memory' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1277:18: warning: unused function 'stbi_load_16_from_callbacks' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1257:18: warning: unused function 'stbi_load_16' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16(char const *filename, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1333:16: warning: unused function 'stbi_loadf_from_memory' [-Wunused-function]
STBIDEF float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1340:16: warning: unused function 'stbi_loadf_from_callbacks' [-Wunused-function]
STBIDEF float *stbi_loadf_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1348:16: warning: unused function 'stbi_loadf' [-Wunused-function]
STBIDEF float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1436:16: warning: unused function 'stbi_hdr_to_ldr_gamma' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1/gamma; }
               ^
../inst/include/stb/stb_image.h:1437:16: warning: unused function 'stbi_hdr_to_ldr_scale' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1/scale; }
               ^
../inst/include/stb/stb_image.h:1430:16: warning: unused function 'stbi_ldr_to_hdr_gamma' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; }
               ^
../inst/include/stb/stb_image.h:1431:16: warning: unused function 'stbi_ldr_to_hdr_scale' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; }
               ^
../inst/include/stb/stb_image.h:1414:18: warning: unused function 'stbi_is_hdr_from_callbacks' [-Wunused-function]
STBIDEF int      stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user)
                 ^
../inst/include/stb/stb_image.h:1372:13: warning: unused function 'stbi_is_hdr_from_memory' [-Wunused-function]
STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:1386:18: warning: unused function 'stbi_is_hdr' [-Wunused-function]
STBIDEF int      stbi_is_hdr          (char const *filename)
                 ^
../inst/include/stb/stb_image.h:7293:13: warning: unused function 'stbi_info_from_memory' [-Wunused-function]
STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7300:13: warning: unused function 'stbi_info_from_callbacks' [-Wunused-function]
STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7307:13: warning: unused function 'stbi_is_16_bit_from_memory' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:7314:13: warning: unused function 'stbi_is_16_bit_from_callbacks' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *c, void *user)
            ^
../inst/include/stb/stb_image.h:7250:13: warning: unused function 'stbi_info' [-Wunused-function]
STBIDEF int stbi_info(char const *filename, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7271:13: warning: unused function 'stbi_is_16_bit' [-Wunused-function]
STBIDEF int stbi_is_16_bit(char const *filename)
            ^
../inst/include/stb/stb_image.h:4742:14: warning: unused function 'stbi_set_unpremultiply_on_load' [-Wunused-function]
STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply)
             ^
../inst/include/stb/stb_image.h:4747:14: warning: unused function 'stbi_convert_iphone_png_to_rgb' [-Wunused-function]
STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert)
             ^
../inst/include/stb/stb_image.h:999:14: warning: unused function 'stbi_set_flip_vertically_on_load' [-Wunused-function]
STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip)
             ^
../inst/include/stb/stb_image.h:4260:15: warning: unused function 'stbi_zlib_decode_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4281:13: warning: unused function 'stbi_zlib_decode_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, char const *ibuffer, int ilen)
            ^
../inst/include/stb/stb_image.h:4292:15: warning: unused function 'stbi_zlib_decode_noheader_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_noheader_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4308:13: warning: unused function 'stbi_zlib_decode_noheader_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen)
            ^
In file included from adaboost.cpp:9:
In file included from ../inst/include/mlpack/methods/adaboost/adaboost_main.cpp:34:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:32:
In file included from ../inst/include/mlpack/core/data/save.hpp:24:
In file included from ../inst/include/mlpack/core/data/save_image.hpp:26:
../inst/include/stb/stb_image_write.h:1182:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/stb/stb_image_write.h:482:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:580:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:754:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/stb/stb_image_write.h:1514:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/stb/stb_image_write.h:266:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
35 warnings generated.
clang++ -arch arm64 -std=gnu++17 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppEnsmallen/include' -I/opt/R/arm64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2  -c approx_kfn.cpp -o approx_kfn.o
In file included from approx_kfn.cpp:9:
In file included from ../inst/include/mlpack/methods/approx_kfn/approx_kfn_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:31:
In file included from ../inst/include/mlpack/core/data/load.hpp:26:
In file included from ../inst/include/mlpack/core/data/load_image.hpp:29:
../inst/include/stb/stb_image.h:1284:18: warning: unused function 'stbi_load_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1291:18: warning: unused function 'stbi_load_from_callbacks' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1299:18: warning: unused function 'stbi_load_gif_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1270:18: warning: unused function 'stbi_load_16_from_memory' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1277:18: warning: unused function 'stbi_load_16_from_callbacks' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1257:18: warning: unused function 'stbi_load_16' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16(char const *filename, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1333:16: warning: unused function 'stbi_loadf_from_memory' [-Wunused-function]
STBIDEF float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1340:16: warning: unused function 'stbi_loadf_from_callbacks' [-Wunused-function]
STBIDEF float *stbi_loadf_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1348:16: warning: unused function 'stbi_loadf' [-Wunused-function]
STBIDEF float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1436:16: warning: unused function 'stbi_hdr_to_ldr_gamma' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1/gamma; }
               ^
../inst/include/stb/stb_image.h:1437:16: warning: unused function 'stbi_hdr_to_ldr_scale' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1/scale; }
               ^
../inst/include/stb/stb_image.h:1430:16: warning: unused function 'stbi_ldr_to_hdr_gamma' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; }
               ^
../inst/include/stb/stb_image.h:1431:16: warning: unused function 'stbi_ldr_to_hdr_scale' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; }
               ^
../inst/include/stb/stb_image.h:1414:18: warning: unused function 'stbi_is_hdr_from_callbacks' [-Wunused-function]
STBIDEF int      stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user)
                 ^
../inst/include/stb/stb_image.h:1372:13: warning: unused function 'stbi_is_hdr_from_memory' [-Wunused-function]
STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:1386:18: warning: unused function 'stbi_is_hdr' [-Wunused-function]
STBIDEF int      stbi_is_hdr          (char const *filename)
                 ^
../inst/include/stb/stb_image.h:7293:13: warning: unused function 'stbi_info_from_memory' [-Wunused-function]
STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7300:13: warning: unused function 'stbi_info_from_callbacks' [-Wunused-function]
STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7307:13: warning: unused function 'stbi_is_16_bit_from_memory' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:7314:13: warning: unused function 'stbi_is_16_bit_from_callbacks' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *c, void *user)
            ^
../inst/include/stb/stb_image.h:7250:13: warning: unused function 'stbi_info' [-Wunused-function]
STBIDEF int stbi_info(char const *filename, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7271:13: warning: unused function 'stbi_is_16_bit' [-Wunused-function]
STBIDEF int stbi_is_16_bit(char const *filename)
            ^
../inst/include/stb/stb_image.h:4742:14: warning: unused function 'stbi_set_unpremultiply_on_load' [-Wunused-function]
STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply)
             ^
../inst/include/stb/stb_image.h:4747:14: warning: unused function 'stbi_convert_iphone_png_to_rgb' [-Wunused-function]
STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert)
             ^
../inst/include/stb/stb_image.h:999:14: warning: unused function 'stbi_set_flip_vertically_on_load' [-Wunused-function]
STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip)
             ^
../inst/include/stb/stb_image.h:4260:15: warning: unused function 'stbi_zlib_decode_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4281:13: warning: unused function 'stbi_zlib_decode_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, char const *ibuffer, int ilen)
            ^
../inst/include/stb/stb_image.h:4292:15: warning: unused function 'stbi_zlib_decode_noheader_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_noheader_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4308:13: warning: unused function 'stbi_zlib_decode_noheader_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen)
            ^
In file included from approx_kfn.cpp:9:
In file included from ../inst/include/mlpack/methods/approx_kfn/approx_kfn_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:32:
In file included from ../inst/include/mlpack/core/data/save.hpp:24:
In file included from ../inst/include/mlpack/core/data/save_image.hpp:26:
../inst/include/stb/stb_image_write.h:1182:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/stb/stb_image_write.h:482:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:580:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:754:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/stb/stb_image_write.h:1514:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/stb/stb_image_write.h:266:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
35 warnings generated.
clang++ -arch arm64 -std=gnu++17 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppEnsmallen/include' -I/opt/R/arm64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2  -c bayesian_linear_regression.cpp -o bayesian_linear_regression.o
In file included from bayesian_linear_regression.cpp:9:
In file included from ../inst/include/mlpack/methods/bayesian_linear_regression/bayesian_linear_regression_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:31:
In file included from ../inst/include/mlpack/core/data/load.hpp:26:
In file included from ../inst/include/mlpack/core/data/load_image.hpp:29:
../inst/include/stb/stb_image.h:1284:18: warning: unused function 'stbi_load_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1291:18: warning: unused function 'stbi_load_from_callbacks' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1299:18: warning: unused function 'stbi_load_gif_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1270:18: warning: unused function 'stbi_load_16_from_memory' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1277:18: warning: unused function 'stbi_load_16_from_callbacks' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1257:18: warning: unused function 'stbi_load_16' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16(char const *filename, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1333:16: warning: unused function 'stbi_loadf_from_memory' [-Wunused-function]
STBIDEF float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1340:16: warning: unused function 'stbi_loadf_from_callbacks' [-Wunused-function]
STBIDEF float *stbi_loadf_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1348:16: warning: unused function 'stbi_loadf' [-Wunused-function]
STBIDEF float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1436:16: warning: unused function 'stbi_hdr_to_ldr_gamma' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1/gamma; }
               ^
../inst/include/stb/stb_image.h:1437:16: warning: unused function 'stbi_hdr_to_ldr_scale' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1/scale; }
               ^
../inst/include/stb/stb_image.h:1430:16: warning: unused function 'stbi_ldr_to_hdr_gamma' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; }
               ^
../inst/include/stb/stb_image.h:1431:16: warning: unused function 'stbi_ldr_to_hdr_scale' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; }
               ^
../inst/include/stb/stb_image.h:1414:18: warning: unused function 'stbi_is_hdr_from_callbacks' [-Wunused-function]
STBIDEF int      stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user)
                 ^
../inst/include/stb/stb_image.h:1372:13: warning: unused function 'stbi_is_hdr_from_memory' [-Wunused-function]
STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:1386:18: warning: unused function 'stbi_is_hdr' [-Wunused-function]
STBIDEF int      stbi_is_hdr          (char const *filename)
                 ^
../inst/include/stb/stb_image.h:7293:13: warning: unused function 'stbi_info_from_memory' [-Wunused-function]
STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7300:13: warning: unused function 'stbi_info_from_callbacks' [-Wunused-function]
STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7307:13: warning: unused function 'stbi_is_16_bit_from_memory' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:7314:13: warning: unused function 'stbi_is_16_bit_from_callbacks' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *c, void *user)
            ^
../inst/include/stb/stb_image.h:7250:13: warning: unused function 'stbi_info' [-Wunused-function]
STBIDEF int stbi_info(char const *filename, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7271:13: warning: unused function 'stbi_is_16_bit' [-Wunused-function]
STBIDEF int stbi_is_16_bit(char const *filename)
            ^
../inst/include/stb/stb_image.h:4742:14: warning: unused function 'stbi_set_unpremultiply_on_load' [-Wunused-function]
STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply)
             ^
../inst/include/stb/stb_image.h:4747:14: warning: unused function 'stbi_convert_iphone_png_to_rgb' [-Wunused-function]
STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert)
             ^
../inst/include/stb/stb_image.h:999:14: warning: unused function 'stbi_set_flip_vertically_on_load' [-Wunused-function]
STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip)
             ^
../inst/include/stb/stb_image.h:4260:15: warning: unused function 'stbi_zlib_decode_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4281:13: warning: unused function 'stbi_zlib_decode_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, char const *ibuffer, int ilen)
            ^
../inst/include/stb/stb_image.h:4292:15: warning: unused function 'stbi_zlib_decode_noheader_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_noheader_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4308:13: warning: unused function 'stbi_zlib_decode_noheader_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen)
            ^
In file included from bayesian_linear_regression.cpp:9:
In file included from ../inst/include/mlpack/methods/bayesian_linear_regression/bayesian_linear_regression_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:32:
In file included from ../inst/include/mlpack/core/data/save.hpp:24:
In file included from ../inst/include/mlpack/core/data/save_image.hpp:26:
../inst/include/stb/stb_image_write.h:1182:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/stb/stb_image_write.h:482:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:580:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:754:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/stb/stb_image_write.h:1514:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/stb/stb_image_write.h:266:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
35 warnings generated.
clang++ -arch arm64 -std=gnu++17 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppEnsmallen/include' -I/opt/R/arm64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2  -c cf.cpp -o cf.o
In file included from cf.cpp:9:
In file included from ../inst/include/mlpack/methods/cf/cf_main.cpp:19:
In file included from ../inst/include/mlpack/methods/cf/cf.hpp:22:
In file included from ../inst/include/mlpack/methods/amf/amf.hpp:23:
In file included from ../inst/include/mlpack/methods/amf/update_rules/update_rules.hpp:18:
../inst/include/mlpack/methods/amf/update_rules/svd_batch_learning.hpp:210:16: warning: unused variable 'm' [-Wunused-variable]
  const size_t m = (size_t) V.n_cols;
               ^
../inst/include/mlpack/methods/amf/update_rules/svd_batch_learning.hpp:264:16: warning: unused variable 'n' [-Wunused-variable]
  const size_t n = (size_t) V.n_rows;
               ^
In file included from cf.cpp:9:
In file included from ../inst/include/mlpack/methods/cf/cf_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:31:
In file included from ../inst/include/mlpack/core/data/load.hpp:26:
In file included from ../inst/include/mlpack/core/data/load_image.hpp:29:
../inst/include/stb/stb_image.h:1284:18: warning: unused function 'stbi_load_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1291:18: warning: unused function 'stbi_load_from_callbacks' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1299:18: warning: unused function 'stbi_load_gif_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1270:18: warning: unused function 'stbi_load_16_from_memory' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1277:18: warning: unused function 'stbi_load_16_from_callbacks' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1257:18: warning: unused function 'stbi_load_16' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16(char const *filename, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1333:16: warning: unused function 'stbi_loadf_from_memory' [-Wunused-function]
STBIDEF float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1340:16: warning: unused function 'stbi_loadf_from_callbacks' [-Wunused-function]
STBIDEF float *stbi_loadf_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1348:16: warning: unused function 'stbi_loadf' [-Wunused-function]
STBIDEF float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1436:16: warning: unused function 'stbi_hdr_to_ldr_gamma' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1/gamma; }
               ^
../inst/include/stb/stb_image.h:1437:16: warning: unused function 'stbi_hdr_to_ldr_scale' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1/scale; }
               ^
../inst/include/stb/stb_image.h:1430:16: warning: unused function 'stbi_ldr_to_hdr_gamma' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; }
               ^
../inst/include/stb/stb_image.h:1431:16: warning: unused function 'stbi_ldr_to_hdr_scale' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; }
               ^
../inst/include/stb/stb_image.h:1414:18: warning: unused function 'stbi_is_hdr_from_callbacks' [-Wunused-function]
STBIDEF int      stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user)
                 ^
../inst/include/stb/stb_image.h:1372:13: warning: unused function 'stbi_is_hdr_from_memory' [-Wunused-function]
STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:1386:18: warning: unused function 'stbi_is_hdr' [-Wunused-function]
STBIDEF int      stbi_is_hdr          (char const *filename)
                 ^
../inst/include/stb/stb_image.h:7293:13: warning: unused function 'stbi_info_from_memory' [-Wunused-function]
STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7300:13: warning: unused function 'stbi_info_from_callbacks' [-Wunused-function]
STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7307:13: warning: unused function 'stbi_is_16_bit_from_memory' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:7314:13: warning: unused function 'stbi_is_16_bit_from_callbacks' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *c, void *user)
            ^
../inst/include/stb/stb_image.h:7250:13: warning: unused function 'stbi_info' [-Wunused-function]
STBIDEF int stbi_info(char const *filename, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7271:13: warning: unused function 'stbi_is_16_bit' [-Wunused-function]
STBIDEF int stbi_is_16_bit(char const *filename)
            ^
../inst/include/stb/stb_image.h:4742:14: warning: unused function 'stbi_set_unpremultiply_on_load' [-Wunused-function]
STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply)
             ^
../inst/include/stb/stb_image.h:4747:14: warning: unused function 'stbi_convert_iphone_png_to_rgb' [-Wunused-function]
STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert)
             ^
../inst/include/stb/stb_image.h:999:14: warning: unused function 'stbi_set_flip_vertically_on_load' [-Wunused-function]
STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip)
             ^
../inst/include/stb/stb_image.h:4260:15: warning: unused function 'stbi_zlib_decode_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4281:13: warning: unused function 'stbi_zlib_decode_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, char const *ibuffer, int ilen)
            ^
../inst/include/stb/stb_image.h:4292:15: warning: unused function 'stbi_zlib_decode_noheader_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_noheader_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4308:13: warning: unused function 'stbi_zlib_decode_noheader_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen)
            ^
In file included from cf.cpp:9:
In file included from ../inst/include/mlpack/methods/cf/cf_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:32:
In file included from ../inst/include/mlpack/core/data/save.hpp:24:
In file included from ../inst/include/mlpack/core/data/save_image.hpp:26:
../inst/include/stb/stb_image_write.h:1182:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/stb/stb_image_write.h:482:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:580:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:754:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/stb/stb_image_write.h:1514:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/stb/stb_image_write.h:266:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
37 warnings generated.
clang++ -arch arm64 -std=gnu++17 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppEnsmallen/include' -I/opt/R/arm64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2  -c dbscan.cpp -o dbscan.o
In file included from dbscan.cpp:9:
In file included from ../inst/include/mlpack/methods/dbscan/dbscan_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:31:
In file included from ../inst/include/mlpack/core/data/load.hpp:26:
In file included from ../inst/include/mlpack/core/data/load_image.hpp:29:
../inst/include/stb/stb_image.h:1284:18: warning: unused function 'stbi_load_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1291:18: warning: unused function 'stbi_load_from_callbacks' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1299:18: warning: unused function 'stbi_load_gif_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1270:18: warning: unused function 'stbi_load_16_from_memory' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1277:18: warning: unused function 'stbi_load_16_from_callbacks' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1257:18: warning: unused function 'stbi_load_16' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16(char const *filename, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1333:16: warning: unused function 'stbi_loadf_from_memory' [-Wunused-function]
STBIDEF float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1340:16: warning: unused function 'stbi_loadf_from_callbacks' [-Wunused-function]
STBIDEF float *stbi_loadf_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1348:16: warning: unused function 'stbi_loadf' [-Wunused-function]
STBIDEF float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1436:16: warning: unused function 'stbi_hdr_to_ldr_gamma' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1/gamma; }
               ^
../inst/include/stb/stb_image.h:1437:16: warning: unused function 'stbi_hdr_to_ldr_scale' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1/scale; }
               ^
../inst/include/stb/stb_image.h:1430:16: warning: unused function 'stbi_ldr_to_hdr_gamma' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; }
               ^
../inst/include/stb/stb_image.h:1431:16: warning: unused function 'stbi_ldr_to_hdr_scale' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; }
               ^
../inst/include/stb/stb_image.h:1414:18: warning: unused function 'stbi_is_hdr_from_callbacks' [-Wunused-function]
STBIDEF int      stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user)
                 ^
../inst/include/stb/stb_image.h:1372:13: warning: unused function 'stbi_is_hdr_from_memory' [-Wunused-function]
STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:1386:18: warning: unused function 'stbi_is_hdr' [-Wunused-function]
STBIDEF int      stbi_is_hdr          (char const *filename)
                 ^
../inst/include/stb/stb_image.h:7293:13: warning: unused function 'stbi_info_from_memory' [-Wunused-function]
STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7300:13: warning: unused function 'stbi_info_from_callbacks' [-Wunused-function]
STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7307:13: warning: unused function 'stbi_is_16_bit_from_memory' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:7314:13: warning: unused function 'stbi_is_16_bit_from_callbacks' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *c, void *user)
            ^
../inst/include/stb/stb_image.h:7250:13: warning: unused function 'stbi_info' [-Wunused-function]
STBIDEF int stbi_info(char const *filename, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7271:13: warning: unused function 'stbi_is_16_bit' [-Wunused-function]
STBIDEF int stbi_is_16_bit(char const *filename)
            ^
../inst/include/stb/stb_image.h:4742:14: warning: unused function 'stbi_set_unpremultiply_on_load' [-Wunused-function]
STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply)
             ^
../inst/include/stb/stb_image.h:4747:14: warning: unused function 'stbi_convert_iphone_png_to_rgb' [-Wunused-function]
STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert)
             ^
../inst/include/stb/stb_image.h:999:14: warning: unused function 'stbi_set_flip_vertically_on_load' [-Wunused-function]
STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip)
             ^
../inst/include/stb/stb_image.h:4260:15: warning: unused function 'stbi_zlib_decode_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4281:13: warning: unused function 'stbi_zlib_decode_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, char const *ibuffer, int ilen)
            ^
../inst/include/stb/stb_image.h:4292:15: warning: unused function 'stbi_zlib_decode_noheader_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_noheader_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4308:13: warning: unused function 'stbi_zlib_decode_noheader_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen)
            ^
In file included from dbscan.cpp:9:
In file included from ../inst/include/mlpack/methods/dbscan/dbscan_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:32:
In file included from ../inst/include/mlpack/core/data/save.hpp:24:
In file included from ../inst/include/mlpack/core/data/save_image.hpp:26:
../inst/include/stb/stb_image_write.h:1182:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/stb/stb_image_write.h:482:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:580:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:754:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/stb/stb_image_write.h:1514:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/stb/stb_image_write.h:266:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
35 warnings generated.
clang++ -arch arm64 -std=gnu++17 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppEnsmallen/include' -I/opt/R/arm64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2  -c decision_tree.cpp -o decision_tree.o
In file included from decision_tree.cpp:9:
In file included from ../inst/include/mlpack/methods/decision_tree/decision_tree_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:31:
In file included from ../inst/include/mlpack/core/data/load.hpp:26:
In file included from ../inst/include/mlpack/core/data/load_image.hpp:29:
../inst/include/stb/stb_image.h:1284:18: warning: unused function 'stbi_load_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1291:18: warning: unused function 'stbi_load_from_callbacks' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1299:18: warning: unused function 'stbi_load_gif_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1270:18: warning: unused function 'stbi_load_16_from_memory' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1277:18: warning: unused function 'stbi_load_16_from_callbacks' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1257:18: warning: unused function 'stbi_load_16' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16(char const *filename, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1333:16: warning: unused function 'stbi_loadf_from_memory' [-Wunused-function]
STBIDEF float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1340:16: warning: unused function 'stbi_loadf_from_callbacks' [-Wunused-function]
STBIDEF float *stbi_loadf_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1348:16: warning: unused function 'stbi_loadf' [-Wunused-function]
STBIDEF float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1436:16: warning: unused function 'stbi_hdr_to_ldr_gamma' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1/gamma; }
               ^
../inst/include/stb/stb_image.h:1437:16: warning: unused function 'stbi_hdr_to_ldr_scale' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1/scale; }
               ^
../inst/include/stb/stb_image.h:1430:16: warning: unused function 'stbi_ldr_to_hdr_gamma' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; }
               ^
../inst/include/stb/stb_image.h:1431:16: warning: unused function 'stbi_ldr_to_hdr_scale' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; }
               ^
../inst/include/stb/stb_image.h:1414:18: warning: unused function 'stbi_is_hdr_from_callbacks' [-Wunused-function]
STBIDEF int      stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user)
                 ^
../inst/include/stb/stb_image.h:1372:13: warning: unused function 'stbi_is_hdr_from_memory' [-Wunused-function]
STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:1386:18: warning: unused function 'stbi_is_hdr' [-Wunused-function]
STBIDEF int      stbi_is_hdr          (char const *filename)
                 ^
../inst/include/stb/stb_image.h:7293:13: warning: unused function 'stbi_info_from_memory' [-Wunused-function]
STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7300:13: warning: unused function 'stbi_info_from_callbacks' [-Wunused-function]
STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7307:13: warning: unused function 'stbi_is_16_bit_from_memory' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:7314:13: warning: unused function 'stbi_is_16_bit_from_callbacks' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *c, void *user)
            ^
../inst/include/stb/stb_image.h:7250:13: warning: unused function 'stbi_info' [-Wunused-function]
STBIDEF int stbi_info(char const *filename, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7271:13: warning: unused function 'stbi_is_16_bit' [-Wunused-function]
STBIDEF int stbi_is_16_bit(char const *filename)
            ^
../inst/include/stb/stb_image.h:4742:14: warning: unused function 'stbi_set_unpremultiply_on_load' [-Wunused-function]
STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply)
             ^
../inst/include/stb/stb_image.h:4747:14: warning: unused function 'stbi_convert_iphone_png_to_rgb' [-Wunused-function]
STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert)
             ^
../inst/include/stb/stb_image.h:999:14: warning: unused function 'stbi_set_flip_vertically_on_load' [-Wunused-function]
STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip)
             ^
../inst/include/stb/stb_image.h:4260:15: warning: unused function 'stbi_zlib_decode_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4281:13: warning: unused function 'stbi_zlib_decode_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, char const *ibuffer, int ilen)
            ^
../inst/include/stb/stb_image.h:4292:15: warning: unused function 'stbi_zlib_decode_noheader_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_noheader_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4308:13: warning: unused function 'stbi_zlib_decode_noheader_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen)
            ^
In file included from decision_tree.cpp:9:
In file included from ../inst/include/mlpack/methods/decision_tree/decision_tree_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:32:
In file included from ../inst/include/mlpack/core/data/save.hpp:24:
In file included from ../inst/include/mlpack/core/data/save_image.hpp:26:
../inst/include/stb/stb_image_write.h:1182:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/stb/stb_image_write.h:482:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:580:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:754:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/stb/stb_image_write.h:1514:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/stb/stb_image_write.h:266:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
35 warnings generated.
clang++ -arch arm64 -std=gnu++17 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppEnsmallen/include' -I/opt/R/arm64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2  -c det.cpp -o det.o
In file included from det.cpp:9:
In file included from ../inst/include/mlpack/methods/det/det_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:31:
In file included from ../inst/include/mlpack/core/data/load.hpp:26:
In file included from ../inst/include/mlpack/core/data/load_image.hpp:29:
../inst/include/stb/stb_image.h:1284:18: warning: unused function 'stbi_load_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1291:18: warning: unused function 'stbi_load_from_callbacks' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1299:18: warning: unused function 'stbi_load_gif_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1270:18: warning: unused function 'stbi_load_16_from_memory' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1277:18: warning: unused function 'stbi_load_16_from_callbacks' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1257:18: warning: unused function 'stbi_load_16' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16(char const *filename, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1333:16: warning: unused function 'stbi_loadf_from_memory' [-Wunused-function]
STBIDEF float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1340:16: warning: unused function 'stbi_loadf_from_callbacks' [-Wunused-function]
STBIDEF float *stbi_loadf_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1348:16: warning: unused function 'stbi_loadf' [-Wunused-function]
STBIDEF float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1436:16: warning: unused function 'stbi_hdr_to_ldr_gamma' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1/gamma; }
               ^
../inst/include/stb/stb_image.h:1437:16: warning: unused function 'stbi_hdr_to_ldr_scale' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1/scale; }
               ^
../inst/include/stb/stb_image.h:1430:16: warning: unused function 'stbi_ldr_to_hdr_gamma' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; }
               ^
../inst/include/stb/stb_image.h:1431:16: warning: unused function 'stbi_ldr_to_hdr_scale' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; }
               ^
../inst/include/stb/stb_image.h:1414:18: warning: unused function 'stbi_is_hdr_from_callbacks' [-Wunused-function]
STBIDEF int      stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user)
                 ^
../inst/include/stb/stb_image.h:1372:13: warning: unused function 'stbi_is_hdr_from_memory' [-Wunused-function]
STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:1386:18: warning: unused function 'stbi_is_hdr' [-Wunused-function]
STBIDEF int      stbi_is_hdr          (char const *filename)
                 ^
../inst/include/stb/stb_image.h:7293:13: warning: unused function 'stbi_info_from_memory' [-Wunused-function]
STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7300:13: warning: unused function 'stbi_info_from_callbacks' [-Wunused-function]
STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7307:13: warning: unused function 'stbi_is_16_bit_from_memory' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:7314:13: warning: unused function 'stbi_is_16_bit_from_callbacks' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *c, void *user)
            ^
../inst/include/stb/stb_image.h:7250:13: warning: unused function 'stbi_info' [-Wunused-function]
STBIDEF int stbi_info(char const *filename, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7271:13: warning: unused function 'stbi_is_16_bit' [-Wunused-function]
STBIDEF int stbi_is_16_bit(char const *filename)
            ^
../inst/include/stb/stb_image.h:4742:14: warning: unused function 'stbi_set_unpremultiply_on_load' [-Wunused-function]
STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply)
             ^
../inst/include/stb/stb_image.h:4747:14: warning: unused function 'stbi_convert_iphone_png_to_rgb' [-Wunused-function]
STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert)
             ^
../inst/include/stb/stb_image.h:999:14: warning: unused function 'stbi_set_flip_vertically_on_load' [-Wunused-function]
STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip)
             ^
../inst/include/stb/stb_image.h:4260:15: warning: unused function 'stbi_zlib_decode_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4281:13: warning: unused function 'stbi_zlib_decode_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, char const *ibuffer, int ilen)
            ^
../inst/include/stb/stb_image.h:4292:15: warning: unused function 'stbi_zlib_decode_noheader_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_noheader_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4308:13: warning: unused function 'stbi_zlib_decode_noheader_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen)
            ^
In file included from det.cpp:9:
In file included from ../inst/include/mlpack/methods/det/det_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:32:
In file included from ../inst/include/mlpack/core/data/save.hpp:24:
In file included from ../inst/include/mlpack/core/data/save_image.hpp:26:
../inst/include/stb/stb_image_write.h:1182:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/stb/stb_image_write.h:482:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:580:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:754:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/stb/stb_image_write.h:1514:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/stb/stb_image_write.h:266:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
35 warnings generated.
clang++ -arch arm64 -std=gnu++17 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppEnsmallen/include' -I/opt/R/arm64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2  -c emst.cpp -o emst.o
In file included from emst.cpp:9:
In file included from ../inst/include/mlpack/methods/emst/emst_main.cpp:27:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:31:
In file included from ../inst/include/mlpack/core/data/load.hpp:26:
In file included from ../inst/include/mlpack/core/data/load_image.hpp:29:
../inst/include/stb/stb_image.h:1284:18: warning: unused function 'stbi_load_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1291:18: warning: unused function 'stbi_load_from_callbacks' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1299:18: warning: unused function 'stbi_load_gif_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1270:18: warning: unused function 'stbi_load_16_from_memory' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1277:18: warning: unused function 'stbi_load_16_from_callbacks' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1257:18: warning: unused function 'stbi_load_16' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16(char const *filename, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1333:16: warning: unused function 'stbi_loadf_from_memory' [-Wunused-function]
STBIDEF float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1340:16: warning: unused function 'stbi_loadf_from_callbacks' [-Wunused-function]
STBIDEF float *stbi_loadf_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1348:16: warning: unused function 'stbi_loadf' [-Wunused-function]
STBIDEF float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1436:16: warning: unused function 'stbi_hdr_to_ldr_gamma' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1/gamma; }
               ^
../inst/include/stb/stb_image.h:1437:16: warning: unused function 'stbi_hdr_to_ldr_scale' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1/scale; }
               ^
../inst/include/stb/stb_image.h:1430:16: warning: unused function 'stbi_ldr_to_hdr_gamma' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; }
               ^
../inst/include/stb/stb_image.h:1431:16: warning: unused function 'stbi_ldr_to_hdr_scale' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; }
               ^
../inst/include/stb/stb_image.h:1414:18: warning: unused function 'stbi_is_hdr_from_callbacks' [-Wunused-function]
STBIDEF int      stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user)
                 ^
../inst/include/stb/stb_image.h:1372:13: warning: unused function 'stbi_is_hdr_from_memory' [-Wunused-function]
STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:1386:18: warning: unused function 'stbi_is_hdr' [-Wunused-function]
STBIDEF int      stbi_is_hdr          (char const *filename)
                 ^
../inst/include/stb/stb_image.h:7293:13: warning: unused function 'stbi_info_from_memory' [-Wunused-function]
STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7300:13: warning: unused function 'stbi_info_from_callbacks' [-Wunused-function]
STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7307:13: warning: unused function 'stbi_is_16_bit_from_memory' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:7314:13: warning: unused function 'stbi_is_16_bit_from_callbacks' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *c, void *user)
            ^
../inst/include/stb/stb_image.h:7250:13: warning: unused function 'stbi_info' [-Wunused-function]
STBIDEF int stbi_info(char const *filename, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7271:13: warning: unused function 'stbi_is_16_bit' [-Wunused-function]
STBIDEF int stbi_is_16_bit(char const *filename)
            ^
../inst/include/stb/stb_image.h:4742:14: warning: unused function 'stbi_set_unpremultiply_on_load' [-Wunused-function]
STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply)
             ^
../inst/include/stb/stb_image.h:4747:14: warning: unused function 'stbi_convert_iphone_png_to_rgb' [-Wunused-function]
STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert)
             ^
../inst/include/stb/stb_image.h:999:14: warning: unused function 'stbi_set_flip_vertically_on_load' [-Wunused-function]
STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip)
             ^
../inst/include/stb/stb_image.h:4260:15: warning: unused function 'stbi_zlib_decode_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4281:13: warning: unused function 'stbi_zlib_decode_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, char const *ibuffer, int ilen)
            ^
../inst/include/stb/stb_image.h:4292:15: warning: unused function 'stbi_zlib_decode_noheader_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_noheader_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4308:13: warning: unused function 'stbi_zlib_decode_noheader_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen)
            ^
In file included from emst.cpp:9:
In file included from ../inst/include/mlpack/methods/emst/emst_main.cpp:27:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:32:
In file included from ../inst/include/mlpack/core/data/save.hpp:24:
In file included from ../inst/include/mlpack/core/data/save_image.hpp:26:
../inst/include/stb/stb_image_write.h:1182:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/stb/stb_image_write.h:482:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:580:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:754:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/stb/stb_image_write.h:1514:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/stb/stb_image_write.h:266:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
35 warnings generated.
clang++ -arch arm64 -std=gnu++17 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppEnsmallen/include' -I/opt/R/arm64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2  -c fastmks.cpp -o fastmks.o
In file included from fastmks.cpp:9:
In file included from ../inst/include/mlpack/methods/fastmks/fastmks_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:31:
In file included from ../inst/include/mlpack/core/data/load.hpp:26:
In file included from ../inst/include/mlpack/core/data/load_image.hpp:29:
../inst/include/stb/stb_image.h:1284:18: warning: unused function 'stbi_load_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1291:18: warning: unused function 'stbi_load_from_callbacks' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1299:18: warning: unused function 'stbi_load_gif_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1270:18: warning: unused function 'stbi_load_16_from_memory' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1277:18: warning: unused function 'stbi_load_16_from_callbacks' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1257:18: warning: unused function 'stbi_load_16' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16(char const *filename, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1333:16: warning: unused function 'stbi_loadf_from_memory' [-Wunused-function]
STBIDEF float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1340:16: warning: unused function 'stbi_loadf_from_callbacks' [-Wunused-function]
STBIDEF float *stbi_loadf_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1348:16: warning: unused function 'stbi_loadf' [-Wunused-function]
STBIDEF float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1436:16: warning: unused function 'stbi_hdr_to_ldr_gamma' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1/gamma; }
               ^
../inst/include/stb/stb_image.h:1437:16: warning: unused function 'stbi_hdr_to_ldr_scale' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1/scale; }
               ^
../inst/include/stb/stb_image.h:1430:16: warning: unused function 'stbi_ldr_to_hdr_gamma' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; }
               ^
../inst/include/stb/stb_image.h:1431:16: warning: unused function 'stbi_ldr_to_hdr_scale' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; }
               ^
../inst/include/stb/stb_image.h:1414:18: warning: unused function 'stbi_is_hdr_from_callbacks' [-Wunused-function]
STBIDEF int      stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user)
                 ^
../inst/include/stb/stb_image.h:1372:13: warning: unused function 'stbi_is_hdr_from_memory' [-Wunused-function]
STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:1386:18: warning: unused function 'stbi_is_hdr' [-Wunused-function]
STBIDEF int      stbi_is_hdr          (char const *filename)
                 ^
../inst/include/stb/stb_image.h:7293:13: warning: unused function 'stbi_info_from_memory' [-Wunused-function]
STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7300:13: warning: unused function 'stbi_info_from_callbacks' [-Wunused-function]
STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7307:13: warning: unused function 'stbi_is_16_bit_from_memory' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:7314:13: warning: unused function 'stbi_is_16_bit_from_callbacks' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *c, void *user)
            ^
../inst/include/stb/stb_image.h:7250:13: warning: unused function 'stbi_info' [-Wunused-function]
STBIDEF int stbi_info(char const *filename, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7271:13: warning: unused function 'stbi_is_16_bit' [-Wunused-function]
STBIDEF int stbi_is_16_bit(char const *filename)
            ^
../inst/include/stb/stb_image.h:4742:14: warning: unused function 'stbi_set_unpremultiply_on_load' [-Wunused-function]
STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply)
             ^
../inst/include/stb/stb_image.h:4747:14: warning: unused function 'stbi_convert_iphone_png_to_rgb' [-Wunused-function]
STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert)
             ^
../inst/include/stb/stb_image.h:999:14: warning: unused function 'stbi_set_flip_vertically_on_load' [-Wunused-function]
STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip)
             ^
../inst/include/stb/stb_image.h:4260:15: warning: unused function 'stbi_zlib_decode_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4281:13: warning: unused function 'stbi_zlib_decode_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, char const *ibuffer, int ilen)
            ^
../inst/include/stb/stb_image.h:4292:15: warning: unused function 'stbi_zlib_decode_noheader_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_noheader_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4308:13: warning: unused function 'stbi_zlib_decode_noheader_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen)
            ^
In file included from fastmks.cpp:9:
In file included from ../inst/include/mlpack/methods/fastmks/fastmks_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:32:
In file included from ../inst/include/mlpack/core/data/save.hpp:24:
In file included from ../inst/include/mlpack/core/data/save_image.hpp:26:
../inst/include/stb/stb_image_write.h:1182:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/stb/stb_image_write.h:482:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:580:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:754:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/stb/stb_image_write.h:1514:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/stb/stb_image_write.h:266:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
35 warnings generated.
clang++ -arch arm64 -std=gnu++17 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppEnsmallen/include' -I/opt/R/arm64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2  -c gmm_generate.cpp -o gmm_generate.o
In file included from gmm_generate.cpp:9:
In file included from ../inst/include/mlpack/methods/gmm/gmm_generate_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:31:
In file included from ../inst/include/mlpack/core/data/load.hpp:26:
In file included from ../inst/include/mlpack/core/data/load_image.hpp:29:
../inst/include/stb/stb_image.h:1284:18: warning: unused function 'stbi_load_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1291:18: warning: unused function 'stbi_load_from_callbacks' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1299:18: warning: unused function 'stbi_load_gif_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1270:18: warning: unused function 'stbi_load_16_from_memory' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1277:18: warning: unused function 'stbi_load_16_from_callbacks' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1257:18: warning: unused function 'stbi_load_16' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16(char const *filename, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1333:16: warning: unused function 'stbi_loadf_from_memory' [-Wunused-function]
STBIDEF float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1340:16: warning: unused function 'stbi_loadf_from_callbacks' [-Wunused-function]
STBIDEF float *stbi_loadf_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1348:16: warning: unused function 'stbi_loadf' [-Wunused-function]
STBIDEF float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1436:16: warning: unused function 'stbi_hdr_to_ldr_gamma' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1/gamma; }
               ^
../inst/include/stb/stb_image.h:1437:16: warning: unused function 'stbi_hdr_to_ldr_scale' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1/scale; }
               ^
../inst/include/stb/stb_image.h:1430:16: warning: unused function 'stbi_ldr_to_hdr_gamma' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; }
               ^
../inst/include/stb/stb_image.h:1431:16: warning: unused function 'stbi_ldr_to_hdr_scale' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; }
               ^
../inst/include/stb/stb_image.h:1414:18: warning: unused function 'stbi_is_hdr_from_callbacks' [-Wunused-function]
STBIDEF int      stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user)
                 ^
../inst/include/stb/stb_image.h:1372:13: warning: unused function 'stbi_is_hdr_from_memory' [-Wunused-function]
STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:1386:18: warning: unused function 'stbi_is_hdr' [-Wunused-function]
STBIDEF int      stbi_is_hdr          (char const *filename)
                 ^
../inst/include/stb/stb_image.h:7293:13: warning: unused function 'stbi_info_from_memory' [-Wunused-function]
STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7300:13: warning: unused function 'stbi_info_from_callbacks' [-Wunused-function]
STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7307:13: warning: unused function 'stbi_is_16_bit_from_memory' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:7314:13: warning: unused function 'stbi_is_16_bit_from_callbacks' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *c, void *user)
            ^
../inst/include/stb/stb_image.h:7250:13: warning: unused function 'stbi_info' [-Wunused-function]
STBIDEF int stbi_info(char const *filename, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7271:13: warning: unused function 'stbi_is_16_bit' [-Wunused-function]
STBIDEF int stbi_is_16_bit(char const *filename)
            ^
../inst/include/stb/stb_image.h:4742:14: warning: unused function 'stbi_set_unpremultiply_on_load' [-Wunused-function]
STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply)
             ^
../inst/include/stb/stb_image.h:4747:14: warning: unused function 'stbi_convert_iphone_png_to_rgb' [-Wunused-function]
STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert)
             ^
../inst/include/stb/stb_image.h:999:14: warning: unused function 'stbi_set_flip_vertically_on_load' [-Wunused-function]
STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip)
             ^
../inst/include/stb/stb_image.h:4260:15: warning: unused function 'stbi_zlib_decode_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4281:13: warning: unused function 'stbi_zlib_decode_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, char const *ibuffer, int ilen)
            ^
../inst/include/stb/stb_image.h:4292:15: warning: unused function 'stbi_zlib_decode_noheader_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_noheader_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4308:13: warning: unused function 'stbi_zlib_decode_noheader_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen)
            ^
In file included from gmm_generate.cpp:9:
In file included from ../inst/include/mlpack/methods/gmm/gmm_generate_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:32:
In file included from ../inst/include/mlpack/core/data/save.hpp:24:
In file included from ../inst/include/mlpack/core/data/save_image.hpp:26:
../inst/include/stb/stb_image_write.h:1182:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/stb/stb_image_write.h:482:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:580:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:754:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/stb/stb_image_write.h:1514:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/stb/stb_image_write.h:266:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
35 warnings generated.
clang++ -arch arm64 -std=gnu++17 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppEnsmallen/include' -I/opt/R/arm64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2  -c gmm_probability.cpp -o gmm_probability.o
In file included from gmm_probability.cpp:9:
In file included from ../inst/include/mlpack/methods/gmm/gmm_probability_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:31:
In file included from ../inst/include/mlpack/core/data/load.hpp:26:
In file included from ../inst/include/mlpack/core/data/load_image.hpp:29:
../inst/include/stb/stb_image.h:1284:18: warning: unused function 'stbi_load_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1291:18: warning: unused function 'stbi_load_from_callbacks' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1299:18: warning: unused function 'stbi_load_gif_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1270:18: warning: unused function 'stbi_load_16_from_memory' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1277:18: warning: unused function 'stbi_load_16_from_callbacks' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1257:18: warning: unused function 'stbi_load_16' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16(char const *filename, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1333:16: warning: unused function 'stbi_loadf_from_memory' [-Wunused-function]
STBIDEF float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1340:16: warning: unused function 'stbi_loadf_from_callbacks' [-Wunused-function]
STBIDEF float *stbi_loadf_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1348:16: warning: unused function 'stbi_loadf' [-Wunused-function]
STBIDEF float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1436:16: warning: unused function 'stbi_hdr_to_ldr_gamma' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1/gamma; }
               ^
../inst/include/stb/stb_image.h:1437:16: warning: unused function 'stbi_hdr_to_ldr_scale' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1/scale; }
               ^
../inst/include/stb/stb_image.h:1430:16: warning: unused function 'stbi_ldr_to_hdr_gamma' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; }
               ^
../inst/include/stb/stb_image.h:1431:16: warning: unused function 'stbi_ldr_to_hdr_scale' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; }
               ^
../inst/include/stb/stb_image.h:1414:18: warning: unused function 'stbi_is_hdr_from_callbacks' [-Wunused-function]
STBIDEF int      stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user)
                 ^
../inst/include/stb/stb_image.h:1372:13: warning: unused function 'stbi_is_hdr_from_memory' [-Wunused-function]
STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:1386:18: warning: unused function 'stbi_is_hdr' [-Wunused-function]
STBIDEF int      stbi_is_hdr          (char const *filename)
                 ^
../inst/include/stb/stb_image.h:7293:13: warning: unused function 'stbi_info_from_memory' [-Wunused-function]
STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7300:13: warning: unused function 'stbi_info_from_callbacks' [-Wunused-function]
STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7307:13: warning: unused function 'stbi_is_16_bit_from_memory' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:7314:13: warning: unused function 'stbi_is_16_bit_from_callbacks' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *c, void *user)
            ^
../inst/include/stb/stb_image.h:7250:13: warning: unused function 'stbi_info' [-Wunused-function]
STBIDEF int stbi_info(char const *filename, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7271:13: warning: unused function 'stbi_is_16_bit' [-Wunused-function]
STBIDEF int stbi_is_16_bit(char const *filename)
            ^
../inst/include/stb/stb_image.h:4742:14: warning: unused function 'stbi_set_unpremultiply_on_load' [-Wunused-function]
STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply)
             ^
../inst/include/stb/stb_image.h:4747:14: warning: unused function 'stbi_convert_iphone_png_to_rgb' [-Wunused-function]
STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert)
             ^
../inst/include/stb/stb_image.h:999:14: warning: unused function 'stbi_set_flip_vertically_on_load' [-Wunused-function]
STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip)
             ^
../inst/include/stb/stb_image.h:4260:15: warning: unused function 'stbi_zlib_decode_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4281:13: warning: unused function 'stbi_zlib_decode_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, char const *ibuffer, int ilen)
            ^
../inst/include/stb/stb_image.h:4292:15: warning: unused function 'stbi_zlib_decode_noheader_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_noheader_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4308:13: warning: unused function 'stbi_zlib_decode_noheader_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen)
            ^
In file included from gmm_probability.cpp:9:
In file included from ../inst/include/mlpack/methods/gmm/gmm_probability_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:32:
In file included from ../inst/include/mlpack/core/data/save.hpp:24:
In file included from ../inst/include/mlpack/core/data/save_image.hpp:26:
../inst/include/stb/stb_image_write.h:1182:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/stb/stb_image_write.h:482:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:580:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:754:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/stb/stb_image_write.h:1514:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/stb/stb_image_write.h:266:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
35 warnings generated.
clang++ -arch arm64 -std=gnu++17 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppEnsmallen/include' -I/opt/R/arm64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2  -c gmm_train.cpp -o gmm_train.o
In file included from gmm_train.cpp:9:
In file included from ../inst/include/mlpack/methods/gmm/gmm_train_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:31:
In file included from ../inst/include/mlpack/core/data/load.hpp:26:
In file included from ../inst/include/mlpack/core/data/load_image.hpp:29:
../inst/include/stb/stb_image.h:1284:18: warning: unused function 'stbi_load_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1291:18: warning: unused function 'stbi_load_from_callbacks' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1299:18: warning: unused function 'stbi_load_gif_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1270:18: warning: unused function 'stbi_load_16_from_memory' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1277:18: warning: unused function 'stbi_load_16_from_callbacks' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1257:18: warning: unused function 'stbi_load_16' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16(char const *filename, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1333:16: warning: unused function 'stbi_loadf_from_memory' [-Wunused-function]
STBIDEF float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1340:16: warning: unused function 'stbi_loadf_from_callbacks' [-Wunused-function]
STBIDEF float *stbi_loadf_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1348:16: warning: unused function 'stbi_loadf' [-Wunused-function]
STBIDEF float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1436:16: warning: unused function 'stbi_hdr_to_ldr_gamma' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1/gamma; }
               ^
../inst/include/stb/stb_image.h:1437:16: warning: unused function 'stbi_hdr_to_ldr_scale' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1/scale; }
               ^
../inst/include/stb/stb_image.h:1430:16: warning: unused function 'stbi_ldr_to_hdr_gamma' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; }
               ^
../inst/include/stb/stb_image.h:1431:16: warning: unused function 'stbi_ldr_to_hdr_scale' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; }
               ^
../inst/include/stb/stb_image.h:1414:18: warning: unused function 'stbi_is_hdr_from_callbacks' [-Wunused-function]
STBIDEF int      stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user)
                 ^
../inst/include/stb/stb_image.h:1372:13: warning: unused function 'stbi_is_hdr_from_memory' [-Wunused-function]
STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:1386:18: warning: unused function 'stbi_is_hdr' [-Wunused-function]
STBIDEF int      stbi_is_hdr          (char const *filename)
                 ^
../inst/include/stb/stb_image.h:7293:13: warning: unused function 'stbi_info_from_memory' [-Wunused-function]
STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7300:13: warning: unused function 'stbi_info_from_callbacks' [-Wunused-function]
STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7307:13: warning: unused function 'stbi_is_16_bit_from_memory' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:7314:13: warning: unused function 'stbi_is_16_bit_from_callbacks' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *c, void *user)
            ^
../inst/include/stb/stb_image.h:7250:13: warning: unused function 'stbi_info' [-Wunused-function]
STBIDEF int stbi_info(char const *filename, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7271:13: warning: unused function 'stbi_is_16_bit' [-Wunused-function]
STBIDEF int stbi_is_16_bit(char const *filename)
            ^
../inst/include/stb/stb_image.h:4742:14: warning: unused function 'stbi_set_unpremultiply_on_load' [-Wunused-function]
STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply)
             ^
../inst/include/stb/stb_image.h:4747:14: warning: unused function 'stbi_convert_iphone_png_to_rgb' [-Wunused-function]
STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert)
             ^
../inst/include/stb/stb_image.h:999:14: warning: unused function 'stbi_set_flip_vertically_on_load' [-Wunused-function]
STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip)
             ^
../inst/include/stb/stb_image.h:4260:15: warning: unused function 'stbi_zlib_decode_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4281:13: warning: unused function 'stbi_zlib_decode_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, char const *ibuffer, int ilen)
            ^
../inst/include/stb/stb_image.h:4292:15: warning: unused function 'stbi_zlib_decode_noheader_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_noheader_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4308:13: warning: unused function 'stbi_zlib_decode_noheader_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen)
            ^
In file included from gmm_train.cpp:9:
In file included from ../inst/include/mlpack/methods/gmm/gmm_train_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:32:
In file included from ../inst/include/mlpack/core/data/save.hpp:24:
In file included from ../inst/include/mlpack/core/data/save_image.hpp:26:
../inst/include/stb/stb_image_write.h:1182:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/stb/stb_image_write.h:482:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:580:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:754:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/stb/stb_image_write.h:1514:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/stb/stb_image_write.h:266:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
35 warnings generated.
clang++ -arch arm64 -std=gnu++17 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppEnsmallen/include' -I/opt/R/arm64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2  -c hmm_generate.cpp -o hmm_generate.o
In file included from hmm_generate.cpp:9:
In file included from ../inst/include/mlpack/methods/hmm/hmm_generate_main.cpp:14:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:31:
In file included from ../inst/include/mlpack/core/data/load.hpp:26:
In file included from ../inst/include/mlpack/core/data/load_image.hpp:29:
../inst/include/stb/stb_image.h:1284:18: warning: unused function 'stbi_load_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1291:18: warning: unused function 'stbi_load_from_callbacks' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1299:18: warning: unused function 'stbi_load_gif_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1270:18: warning: unused function 'stbi_load_16_from_memory' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1277:18: warning: unused function 'stbi_load_16_from_callbacks' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1257:18: warning: unused function 'stbi_load_16' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16(char const *filename, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1333:16: warning: unused function 'stbi_loadf_from_memory' [-Wunused-function]
STBIDEF float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1340:16: warning: unused function 'stbi_loadf_from_callbacks' [-Wunused-function]
STBIDEF float *stbi_loadf_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1348:16: warning: unused function 'stbi_loadf' [-Wunused-function]
STBIDEF float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1436:16: warning: unused function 'stbi_hdr_to_ldr_gamma' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1/gamma; }
               ^
../inst/include/stb/stb_image.h:1437:16: warning: unused function 'stbi_hdr_to_ldr_scale' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1/scale; }
               ^
../inst/include/stb/stb_image.h:1430:16: warning: unused function 'stbi_ldr_to_hdr_gamma' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; }
               ^
../inst/include/stb/stb_image.h:1431:16: warning: unused function 'stbi_ldr_to_hdr_scale' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; }
               ^
../inst/include/stb/stb_image.h:1414:18: warning: unused function 'stbi_is_hdr_from_callbacks' [-Wunused-function]
STBIDEF int      stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user)
                 ^
../inst/include/stb/stb_image.h:1372:13: warning: unused function 'stbi_is_hdr_from_memory' [-Wunused-function]
STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:1386:18: warning: unused function 'stbi_is_hdr' [-Wunused-function]
STBIDEF int      stbi_is_hdr          (char const *filename)
                 ^
../inst/include/stb/stb_image.h:7293:13: warning: unused function 'stbi_info_from_memory' [-Wunused-function]
STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7300:13: warning: unused function 'stbi_info_from_callbacks' [-Wunused-function]
STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7307:13: warning: unused function 'stbi_is_16_bit_from_memory' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:7314:13: warning: unused function 'stbi_is_16_bit_from_callbacks' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *c, void *user)
            ^
../inst/include/stb/stb_image.h:7250:13: warning: unused function 'stbi_info' [-Wunused-function]
STBIDEF int stbi_info(char const *filename, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7271:13: warning: unused function 'stbi_is_16_bit' [-Wunused-function]
STBIDEF int stbi_is_16_bit(char const *filename)
            ^
../inst/include/stb/stb_image.h:4742:14: warning: unused function 'stbi_set_unpremultiply_on_load' [-Wunused-function]
STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply)
             ^
../inst/include/stb/stb_image.h:4747:14: warning: unused function 'stbi_convert_iphone_png_to_rgb' [-Wunused-function]
STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert)
             ^
../inst/include/stb/stb_image.h:999:14: warning: unused function 'stbi_set_flip_vertically_on_load' [-Wunused-function]
STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip)
             ^
../inst/include/stb/stb_image.h:4260:15: warning: unused function 'stbi_zlib_decode_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4281:13: warning: unused function 'stbi_zlib_decode_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, char const *ibuffer, int ilen)
            ^
../inst/include/stb/stb_image.h:4292:15: warning: unused function 'stbi_zlib_decode_noheader_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_noheader_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4308:13: warning: unused function 'stbi_zlib_decode_noheader_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen)
            ^
In file included from hmm_generate.cpp:9:
In file included from ../inst/include/mlpack/methods/hmm/hmm_generate_main.cpp:14:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:32:
In file included from ../inst/include/mlpack/core/data/save.hpp:24:
In file included from ../inst/include/mlpack/core/data/save_image.hpp:26:
../inst/include/stb/stb_image_write.h:1182:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/stb/stb_image_write.h:482:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:580:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:754:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/stb/stb_image_write.h:1514:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/stb/stb_image_write.h:266:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
35 warnings generated.
clang++ -arch arm64 -std=gnu++17 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppEnsmallen/include' -I/opt/R/arm64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2  -c hmm_loglik.cpp -o hmm_loglik.o
In file included from hmm_loglik.cpp:9:
In file included from ../inst/include/mlpack/methods/hmm/hmm_loglik_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:31:
In file included from ../inst/include/mlpack/core/data/load.hpp:26:
In file included from ../inst/include/mlpack/core/data/load_image.hpp:29:
../inst/include/stb/stb_image.h:1284:18: warning: unused function 'stbi_load_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1291:18: warning: unused function 'stbi_load_from_callbacks' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1299:18: warning: unused function 'stbi_load_gif_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1270:18: warning: unused function 'stbi_load_16_from_memory' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1277:18: warning: unused function 'stbi_load_16_from_callbacks' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1257:18: warning: unused function 'stbi_load_16' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16(char const *filename, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1333:16: warning: unused function 'stbi_loadf_from_memory' [-Wunused-function]
STBIDEF float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1340:16: warning: unused function 'stbi_loadf_from_callbacks' [-Wunused-function]
STBIDEF float *stbi_loadf_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1348:16: warning: unused function 'stbi_loadf' [-Wunused-function]
STBIDEF float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1436:16: warning: unused function 'stbi_hdr_to_ldr_gamma' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1/gamma; }
               ^
../inst/include/stb/stb_image.h:1437:16: warning: unused function 'stbi_hdr_to_ldr_scale' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1/scale; }
               ^
../inst/include/stb/stb_image.h:1430:16: warning: unused function 'stbi_ldr_to_hdr_gamma' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; }
               ^
../inst/include/stb/stb_image.h:1431:16: warning: unused function 'stbi_ldr_to_hdr_scale' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; }
               ^
../inst/include/stb/stb_image.h:1414:18: warning: unused function 'stbi_is_hdr_from_callbacks' [-Wunused-function]
STBIDEF int      stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user)
                 ^
../inst/include/stb/stb_image.h:1372:13: warning: unused function 'stbi_is_hdr_from_memory' [-Wunused-function]
STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:1386:18: warning: unused function 'stbi_is_hdr' [-Wunused-function]
STBIDEF int      stbi_is_hdr          (char const *filename)
                 ^
../inst/include/stb/stb_image.h:7293:13: warning: unused function 'stbi_info_from_memory' [-Wunused-function]
STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7300:13: warning: unused function 'stbi_info_from_callbacks' [-Wunused-function]
STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7307:13: warning: unused function 'stbi_is_16_bit_from_memory' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:7314:13: warning: unused function 'stbi_is_16_bit_from_callbacks' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *c, void *user)
            ^
../inst/include/stb/stb_image.h:7250:13: warning: unused function 'stbi_info' [-Wunused-function]
STBIDEF int stbi_info(char const *filename, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7271:13: warning: unused function 'stbi_is_16_bit' [-Wunused-function]
STBIDEF int stbi_is_16_bit(char const *filename)
            ^
../inst/include/stb/stb_image.h:4742:14: warning: unused function 'stbi_set_unpremultiply_on_load' [-Wunused-function]
STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply)
             ^
../inst/include/stb/stb_image.h:4747:14: warning: unused function 'stbi_convert_iphone_png_to_rgb' [-Wunused-function]
STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert)
             ^
../inst/include/stb/stb_image.h:999:14: warning: unused function 'stbi_set_flip_vertically_on_load' [-Wunused-function]
STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip)
             ^
../inst/include/stb/stb_image.h:4260:15: warning: unused function 'stbi_zlib_decode_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4281:13: warning: unused function 'stbi_zlib_decode_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, char const *ibuffer, int ilen)
            ^
../inst/include/stb/stb_image.h:4292:15: warning: unused function 'stbi_zlib_decode_noheader_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_noheader_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4308:13: warning: unused function 'stbi_zlib_decode_noheader_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen)
            ^
In file included from hmm_loglik.cpp:9:
In file included from ../inst/include/mlpack/methods/hmm/hmm_loglik_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:32:
In file included from ../inst/include/mlpack/core/data/save.hpp:24:
In file included from ../inst/include/mlpack/core/data/save_image.hpp:26:
../inst/include/stb/stb_image_write.h:1182:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/stb/stb_image_write.h:482:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:580:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:754:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/stb/stb_image_write.h:1514:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/stb/stb_image_write.h:266:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
35 warnings generated.
clang++ -arch arm64 -std=gnu++17 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppEnsmallen/include' -I/opt/R/arm64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2  -c hmm_train.cpp -o hmm_train.o
In file included from hmm_train.cpp:9:
In file included from ../inst/include/mlpack/methods/hmm/hmm_train_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:31:
In file included from ../inst/include/mlpack/core/data/load.hpp:26:
In file included from ../inst/include/mlpack/core/data/load_image.hpp:29:
../inst/include/stb/stb_image.h:1284:18: warning: unused function 'stbi_load_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1291:18: warning: unused function 'stbi_load_from_callbacks' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1299:18: warning: unused function 'stbi_load_gif_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1270:18: warning: unused function 'stbi_load_16_from_memory' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1277:18: warning: unused function 'stbi_load_16_from_callbacks' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1257:18: warning: unused function 'stbi_load_16' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16(char const *filename, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1333:16: warning: unused function 'stbi_loadf_from_memory' [-Wunused-function]
STBIDEF float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1340:16: warning: unused function 'stbi_loadf_from_callbacks' [-Wunused-function]
STBIDEF float *stbi_loadf_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1348:16: warning: unused function 'stbi_loadf' [-Wunused-function]
STBIDEF float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1436:16: warning: unused function 'stbi_hdr_to_ldr_gamma' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1/gamma; }
               ^
../inst/include/stb/stb_image.h:1437:16: warning: unused function 'stbi_hdr_to_ldr_scale' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1/scale; }
               ^
../inst/include/stb/stb_image.h:1430:16: warning: unused function 'stbi_ldr_to_hdr_gamma' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; }
               ^
../inst/include/stb/stb_image.h:1431:16: warning: unused function 'stbi_ldr_to_hdr_scale' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; }
               ^
../inst/include/stb/stb_image.h:1414:18: warning: unused function 'stbi_is_hdr_from_callbacks' [-Wunused-function]
STBIDEF int      stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user)
                 ^
../inst/include/stb/stb_image.h:1372:13: warning: unused function 'stbi_is_hdr_from_memory' [-Wunused-function]
STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:1386:18: warning: unused function 'stbi_is_hdr' [-Wunused-function]
STBIDEF int      stbi_is_hdr          (char const *filename)
                 ^
../inst/include/stb/stb_image.h:7293:13: warning: unused function 'stbi_info_from_memory' [-Wunused-function]
STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7300:13: warning: unused function 'stbi_info_from_callbacks' [-Wunused-function]
STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7307:13: warning: unused function 'stbi_is_16_bit_from_memory' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:7314:13: warning: unused function 'stbi_is_16_bit_from_callbacks' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *c, void *user)
            ^
../inst/include/stb/stb_image.h:7250:13: warning: unused function 'stbi_info' [-Wunused-function]
STBIDEF int stbi_info(char const *filename, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7271:13: warning: unused function 'stbi_is_16_bit' [-Wunused-function]
STBIDEF int stbi_is_16_bit(char const *filename)
            ^
../inst/include/stb/stb_image.h:4742:14: warning: unused function 'stbi_set_unpremultiply_on_load' [-Wunused-function]
STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply)
             ^
../inst/include/stb/stb_image.h:4747:14: warning: unused function 'stbi_convert_iphone_png_to_rgb' [-Wunused-function]
STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert)
             ^
../inst/include/stb/stb_image.h:999:14: warning: unused function 'stbi_set_flip_vertically_on_load' [-Wunused-function]
STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip)
             ^
../inst/include/stb/stb_image.h:4260:15: warning: unused function 'stbi_zlib_decode_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4281:13: warning: unused function 'stbi_zlib_decode_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, char const *ibuffer, int ilen)
            ^
../inst/include/stb/stb_image.h:4292:15: warning: unused function 'stbi_zlib_decode_noheader_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_noheader_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4308:13: warning: unused function 'stbi_zlib_decode_noheader_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen)
            ^
In file included from hmm_train.cpp:9:
In file included from ../inst/include/mlpack/methods/hmm/hmm_train_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:32:
In file included from ../inst/include/mlpack/core/data/save.hpp:24:
In file included from ../inst/include/mlpack/core/data/save_image.hpp:26:
../inst/include/stb/stb_image_write.h:1182:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/stb/stb_image_write.h:482:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:580:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:754:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/stb/stb_image_write.h:1514:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/stb/stb_image_write.h:266:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
35 warnings generated.
clang++ -arch arm64 -std=gnu++17 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppEnsmallen/include' -I/opt/R/arm64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2  -c hmm_viterbi.cpp -o hmm_viterbi.o
In file included from hmm_viterbi.cpp:9:
In file included from ../inst/include/mlpack/methods/hmm/hmm_viterbi_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:31:
In file included from ../inst/include/mlpack/core/data/load.hpp:26:
In file included from ../inst/include/mlpack/core/data/load_image.hpp:29:
../inst/include/stb/stb_image.h:1284:18: warning: unused function 'stbi_load_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1291:18: warning: unused function 'stbi_load_from_callbacks' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1299:18: warning: unused function 'stbi_load_gif_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1270:18: warning: unused function 'stbi_load_16_from_memory' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1277:18: warning: unused function 'stbi_load_16_from_callbacks' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1257:18: warning: unused function 'stbi_load_16' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16(char const *filename, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1333:16: warning: unused function 'stbi_loadf_from_memory' [-Wunused-function]
STBIDEF float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1340:16: warning: unused function 'stbi_loadf_from_callbacks' [-Wunused-function]
STBIDEF float *stbi_loadf_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1348:16: warning: unused function 'stbi_loadf' [-Wunused-function]
STBIDEF float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1436:16: warning: unused function 'stbi_hdr_to_ldr_gamma' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1/gamma; }
               ^
../inst/include/stb/stb_image.h:1437:16: warning: unused function 'stbi_hdr_to_ldr_scale' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1/scale; }
               ^
../inst/include/stb/stb_image.h:1430:16: warning: unused function 'stbi_ldr_to_hdr_gamma' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; }
               ^
../inst/include/stb/stb_image.h:1431:16: warning: unused function 'stbi_ldr_to_hdr_scale' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; }
               ^
../inst/include/stb/stb_image.h:1414:18: warning: unused function 'stbi_is_hdr_from_callbacks' [-Wunused-function]
STBIDEF int      stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user)
                 ^
../inst/include/stb/stb_image.h:1372:13: warning: unused function 'stbi_is_hdr_from_memory' [-Wunused-function]
STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:1386:18: warning: unused function 'stbi_is_hdr' [-Wunused-function]
STBIDEF int      stbi_is_hdr          (char const *filename)
                 ^
../inst/include/stb/stb_image.h:7293:13: warning: unused function 'stbi_info_from_memory' [-Wunused-function]
STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7300:13: warning: unused function 'stbi_info_from_callbacks' [-Wunused-function]
STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7307:13: warning: unused function 'stbi_is_16_bit_from_memory' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:7314:13: warning: unused function 'stbi_is_16_bit_from_callbacks' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *c, void *user)
            ^
../inst/include/stb/stb_image.h:7250:13: warning: unused function 'stbi_info' [-Wunused-function]
STBIDEF int stbi_info(char const *filename, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7271:13: warning: unused function 'stbi_is_16_bit' [-Wunused-function]
STBIDEF int stbi_is_16_bit(char const *filename)
            ^
../inst/include/stb/stb_image.h:4742:14: warning: unused function 'stbi_set_unpremultiply_on_load' [-Wunused-function]
STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply)
             ^
../inst/include/stb/stb_image.h:4747:14: warning: unused function 'stbi_convert_iphone_png_to_rgb' [-Wunused-function]
STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert)
             ^
../inst/include/stb/stb_image.h:999:14: warning: unused function 'stbi_set_flip_vertically_on_load' [-Wunused-function]
STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip)
             ^
../inst/include/stb/stb_image.h:4260:15: warning: unused function 'stbi_zlib_decode_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4281:13: warning: unused function 'stbi_zlib_decode_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, char const *ibuffer, int ilen)
            ^
../inst/include/stb/stb_image.h:4292:15: warning: unused function 'stbi_zlib_decode_noheader_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_noheader_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4308:13: warning: unused function 'stbi_zlib_decode_noheader_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen)
            ^
In file included from hmm_viterbi.cpp:9:
In file included from ../inst/include/mlpack/methods/hmm/hmm_viterbi_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:32:
In file included from ../inst/include/mlpack/core/data/save.hpp:24:
In file included from ../inst/include/mlpack/core/data/save_image.hpp:26:
../inst/include/stb/stb_image_write.h:1182:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/stb/stb_image_write.h:482:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:580:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:754:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/stb/stb_image_write.h:1514:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/stb/stb_image_write.h:266:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
35 warnings generated.
clang++ -arch arm64 -std=gnu++17 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppEnsmallen/include' -I/opt/R/arm64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2  -c hoeffding_tree.cpp -o hoeffding_tree.o
In file included from hoeffding_tree.cpp:9:
In file included from ../inst/include/mlpack/methods/hoeffding_trees/hoeffding_tree_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:31:
In file included from ../inst/include/mlpack/core/data/load.hpp:26:
In file included from ../inst/include/mlpack/core/data/load_image.hpp:29:
../inst/include/stb/stb_image.h:1284:18: warning: unused function 'stbi_load_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1291:18: warning: unused function 'stbi_load_from_callbacks' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1299:18: warning: unused function 'stbi_load_gif_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1270:18: warning: unused function 'stbi_load_16_from_memory' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1277:18: warning: unused function 'stbi_load_16_from_callbacks' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1257:18: warning: unused function 'stbi_load_16' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16(char const *filename, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1333:16: warning: unused function 'stbi_loadf_from_memory' [-Wunused-function]
STBIDEF float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1340:16: warning: unused function 'stbi_loadf_from_callbacks' [-Wunused-function]
STBIDEF float *stbi_loadf_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1348:16: warning: unused function 'stbi_loadf' [-Wunused-function]
STBIDEF float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1436:16: warning: unused function 'stbi_hdr_to_ldr_gamma' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1/gamma; }
               ^
../inst/include/stb/stb_image.h:1437:16: warning: unused function 'stbi_hdr_to_ldr_scale' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1/scale; }
               ^
../inst/include/stb/stb_image.h:1430:16: warning: unused function 'stbi_ldr_to_hdr_gamma' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; }
               ^
../inst/include/stb/stb_image.h:1431:16: warning: unused function 'stbi_ldr_to_hdr_scale' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; }
               ^
../inst/include/stb/stb_image.h:1414:18: warning: unused function 'stbi_is_hdr_from_callbacks' [-Wunused-function]
STBIDEF int      stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user)
                 ^
../inst/include/stb/stb_image.h:1372:13: warning: unused function 'stbi_is_hdr_from_memory' [-Wunused-function]
STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:1386:18: warning: unused function 'stbi_is_hdr' [-Wunused-function]
STBIDEF int      stbi_is_hdr          (char const *filename)
                 ^
../inst/include/stb/stb_image.h:7293:13: warning: unused function 'stbi_info_from_memory' [-Wunused-function]
STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7300:13: warning: unused function 'stbi_info_from_callbacks' [-Wunused-function]
STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7307:13: warning: unused function 'stbi_is_16_bit_from_memory' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:7314:13: warning: unused function 'stbi_is_16_bit_from_callbacks' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *c, void *user)
            ^
../inst/include/stb/stb_image.h:7250:13: warning: unused function 'stbi_info' [-Wunused-function]
STBIDEF int stbi_info(char const *filename, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7271:13: warning: unused function 'stbi_is_16_bit' [-Wunused-function]
STBIDEF int stbi_is_16_bit(char const *filename)
            ^
../inst/include/stb/stb_image.h:4742:14: warning: unused function 'stbi_set_unpremultiply_on_load' [-Wunused-function]
STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply)
             ^
../inst/include/stb/stb_image.h:4747:14: warning: unused function 'stbi_convert_iphone_png_to_rgb' [-Wunused-function]
STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert)
             ^
../inst/include/stb/stb_image.h:999:14: warning: unused function 'stbi_set_flip_vertically_on_load' [-Wunused-function]
STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip)
             ^
../inst/include/stb/stb_image.h:4260:15: warning: unused function 'stbi_zlib_decode_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4281:13: warning: unused function 'stbi_zlib_decode_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, char const *ibuffer, int ilen)
            ^
../inst/include/stb/stb_image.h:4292:15: warning: unused function 'stbi_zlib_decode_noheader_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_noheader_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4308:13: warning: unused function 'stbi_zlib_decode_noheader_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen)
            ^
In file included from hoeffding_tree.cpp:9:
In file included from ../inst/include/mlpack/methods/hoeffding_trees/hoeffding_tree_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:32:
In file included from ../inst/include/mlpack/core/data/save.hpp:24:
In file included from ../inst/include/mlpack/core/data/save_image.hpp:26:
../inst/include/stb/stb_image_write.h:1182:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/stb/stb_image_write.h:482:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:580:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:754:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/stb/stb_image_write.h:1514:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/stb/stb_image_write.h:266:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
35 warnings generated.
clang++ -arch arm64 -std=gnu++17 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppEnsmallen/include' -I/opt/R/arm64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2  -c image_converter.cpp -o image_converter.o
In file included from image_converter.cpp:9:
In file included from ../inst/include/mlpack/methods/preprocess/image_converter_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:31:
In file included from ../inst/include/mlpack/core/data/load.hpp:26:
In file included from ../inst/include/mlpack/core/data/load_image.hpp:29:
../inst/include/stb/stb_image.h:1284:18: warning: unused function 'stbi_load_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1291:18: warning: unused function 'stbi_load_from_callbacks' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1299:18: warning: unused function 'stbi_load_gif_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1270:18: warning: unused function 'stbi_load_16_from_memory' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1277:18: warning: unused function 'stbi_load_16_from_callbacks' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1257:18: warning: unused function 'stbi_load_16' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16(char const *filename, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1333:16: warning: unused function 'stbi_loadf_from_memory' [-Wunused-function]
STBIDEF float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1340:16: warning: unused function 'stbi_loadf_from_callbacks' [-Wunused-function]
STBIDEF float *stbi_loadf_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1348:16: warning: unused function 'stbi_loadf' [-Wunused-function]
STBIDEF float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1436:16: warning: unused function 'stbi_hdr_to_ldr_gamma' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1/gamma; }
               ^
../inst/include/stb/stb_image.h:1437:16: warning: unused function 'stbi_hdr_to_ldr_scale' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1/scale; }
               ^
../inst/include/stb/stb_image.h:1430:16: warning: unused function 'stbi_ldr_to_hdr_gamma' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; }
               ^
../inst/include/stb/stb_image.h:1431:16: warning: unused function 'stbi_ldr_to_hdr_scale' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; }
               ^
../inst/include/stb/stb_image.h:1414:18: warning: unused function 'stbi_is_hdr_from_callbacks' [-Wunused-function]
STBIDEF int      stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user)
                 ^
../inst/include/stb/stb_image.h:1372:13: warning: unused function 'stbi_is_hdr_from_memory' [-Wunused-function]
STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:1386:18: warning: unused function 'stbi_is_hdr' [-Wunused-function]
STBIDEF int      stbi_is_hdr          (char const *filename)
                 ^
../inst/include/stb/stb_image.h:7293:13: warning: unused function 'stbi_info_from_memory' [-Wunused-function]
STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7300:13: warning: unused function 'stbi_info_from_callbacks' [-Wunused-function]
STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7307:13: warning: unused function 'stbi_is_16_bit_from_memory' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:7314:13: warning: unused function 'stbi_is_16_bit_from_callbacks' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *c, void *user)
            ^
../inst/include/stb/stb_image.h:7250:13: warning: unused function 'stbi_info' [-Wunused-function]
STBIDEF int stbi_info(char const *filename, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7271:13: warning: unused function 'stbi_is_16_bit' [-Wunused-function]
STBIDEF int stbi_is_16_bit(char const *filename)
            ^
../inst/include/stb/stb_image.h:4742:14: warning: unused function 'stbi_set_unpremultiply_on_load' [-Wunused-function]
STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply)
             ^
../inst/include/stb/stb_image.h:4747:14: warning: unused function 'stbi_convert_iphone_png_to_rgb' [-Wunused-function]
STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert)
             ^
../inst/include/stb/stb_image.h:999:14: warning: unused function 'stbi_set_flip_vertically_on_load' [-Wunused-function]
STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip)
             ^
../inst/include/stb/stb_image.h:4260:15: warning: unused function 'stbi_zlib_decode_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4281:13: warning: unused function 'stbi_zlib_decode_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, char const *ibuffer, int ilen)
            ^
../inst/include/stb/stb_image.h:4292:15: warning: unused function 'stbi_zlib_decode_noheader_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_noheader_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4308:13: warning: unused function 'stbi_zlib_decode_noheader_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen)
            ^
In file included from image_converter.cpp:9:
In file included from ../inst/include/mlpack/methods/preprocess/image_converter_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:32:
In file included from ../inst/include/mlpack/core/data/save.hpp:24:
In file included from ../inst/include/mlpack/core/data/save_image.hpp:26:
../inst/include/stb/stb_image_write.h:1182:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/stb/stb_image_write.h:482:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:580:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:754:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/stb/stb_image_write.h:1514:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/stb/stb_image_write.h:266:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
35 warnings generated.
clang++ -arch arm64 -std=gnu++17 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppEnsmallen/include' -I/opt/R/arm64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2  -c kde.cpp -o kde.o
In file included from kde.cpp:9:
In file included from ../inst/include/mlpack/methods/kde/kde_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:31:
In file included from ../inst/include/mlpack/core/data/load.hpp:26:
In file included from ../inst/include/mlpack/core/data/load_image.hpp:29:
../inst/include/stb/stb_image.h:1284:18: warning: unused function 'stbi_load_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1291:18: warning: unused function 'stbi_load_from_callbacks' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1299:18: warning: unused function 'stbi_load_gif_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1270:18: warning: unused function 'stbi_load_16_from_memory' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1277:18: warning: unused function 'stbi_load_16_from_callbacks' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1257:18: warning: unused function 'stbi_load_16' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16(char const *filename, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1333:16: warning: unused function 'stbi_loadf_from_memory' [-Wunused-function]
STBIDEF float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1340:16: warning: unused function 'stbi_loadf_from_callbacks' [-Wunused-function]
STBIDEF float *stbi_loadf_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1348:16: warning: unused function 'stbi_loadf' [-Wunused-function]
STBIDEF float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1436:16: warning: unused function 'stbi_hdr_to_ldr_gamma' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1/gamma; }
               ^
../inst/include/stb/stb_image.h:1437:16: warning: unused function 'stbi_hdr_to_ldr_scale' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1/scale; }
               ^
../inst/include/stb/stb_image.h:1430:16: warning: unused function 'stbi_ldr_to_hdr_gamma' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; }
               ^
../inst/include/stb/stb_image.h:1431:16: warning: unused function 'stbi_ldr_to_hdr_scale' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; }
               ^
../inst/include/stb/stb_image.h:1414:18: warning: unused function 'stbi_is_hdr_from_callbacks' [-Wunused-function]
STBIDEF int      stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user)
                 ^
../inst/include/stb/stb_image.h:1372:13: warning: unused function 'stbi_is_hdr_from_memory' [-Wunused-function]
STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:1386:18: warning: unused function 'stbi_is_hdr' [-Wunused-function]
STBIDEF int      stbi_is_hdr          (char const *filename)
                 ^
../inst/include/stb/stb_image.h:7293:13: warning: unused function 'stbi_info_from_memory' [-Wunused-function]
STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7300:13: warning: unused function 'stbi_info_from_callbacks' [-Wunused-function]
STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7307:13: warning: unused function 'stbi_is_16_bit_from_memory' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:7314:13: warning: unused function 'stbi_is_16_bit_from_callbacks' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *c, void *user)
            ^
../inst/include/stb/stb_image.h:7250:13: warning: unused function 'stbi_info' [-Wunused-function]
STBIDEF int stbi_info(char const *filename, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7271:13: warning: unused function 'stbi_is_16_bit' [-Wunused-function]
STBIDEF int stbi_is_16_bit(char const *filename)
            ^
../inst/include/stb/stb_image.h:4742:14: warning: unused function 'stbi_set_unpremultiply_on_load' [-Wunused-function]
STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply)
             ^
../inst/include/stb/stb_image.h:4747:14: warning: unused function 'stbi_convert_iphone_png_to_rgb' [-Wunused-function]
STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert)
             ^
../inst/include/stb/stb_image.h:999:14: warning: unused function 'stbi_set_flip_vertically_on_load' [-Wunused-function]
STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip)
             ^
../inst/include/stb/stb_image.h:4260:15: warning: unused function 'stbi_zlib_decode_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4281:13: warning: unused function 'stbi_zlib_decode_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, char const *ibuffer, int ilen)
            ^
../inst/include/stb/stb_image.h:4292:15: warning: unused function 'stbi_zlib_decode_noheader_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_noheader_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4308:13: warning: unused function 'stbi_zlib_decode_noheader_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen)
            ^
In file included from kde.cpp:9:
In file included from ../inst/include/mlpack/methods/kde/kde_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:32:
In file included from ../inst/include/mlpack/core/data/save.hpp:24:
In file included from ../inst/include/mlpack/core/data/save_image.hpp:26:
../inst/include/stb/stb_image_write.h:1182:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/stb/stb_image_write.h:482:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:580:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:754:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/stb/stb_image_write.h:1514:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/stb/stb_image_write.h:266:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
35 warnings generated.
clang++ -arch arm64 -std=gnu++17 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppEnsmallen/include' -I/opt/R/arm64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2  -c kernel_pca.cpp -o kernel_pca.o
In file included from kernel_pca.cpp:9:
In file included from ../inst/include/mlpack/methods/kernel_pca/kernel_pca_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:31:
In file included from ../inst/include/mlpack/core/data/load.hpp:26:
In file included from ../inst/include/mlpack/core/data/load_image.hpp:29:
../inst/include/stb/stb_image.h:1284:18: warning: unused function 'stbi_load_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1291:18: warning: unused function 'stbi_load_from_callbacks' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1299:18: warning: unused function 'stbi_load_gif_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1270:18: warning: unused function 'stbi_load_16_from_memory' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1277:18: warning: unused function 'stbi_load_16_from_callbacks' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1257:18: warning: unused function 'stbi_load_16' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16(char const *filename, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1333:16: warning: unused function 'stbi_loadf_from_memory' [-Wunused-function]
STBIDEF float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1340:16: warning: unused function 'stbi_loadf_from_callbacks' [-Wunused-function]
STBIDEF float *stbi_loadf_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1348:16: warning: unused function 'stbi_loadf' [-Wunused-function]
STBIDEF float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1436:16: warning: unused function 'stbi_hdr_to_ldr_gamma' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1/gamma; }
               ^
../inst/include/stb/stb_image.h:1437:16: warning: unused function 'stbi_hdr_to_ldr_scale' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1/scale; }
               ^
../inst/include/stb/stb_image.h:1430:16: warning: unused function 'stbi_ldr_to_hdr_gamma' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; }
               ^
../inst/include/stb/stb_image.h:1431:16: warning: unused function 'stbi_ldr_to_hdr_scale' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; }
               ^
../inst/include/stb/stb_image.h:1414:18: warning: unused function 'stbi_is_hdr_from_callbacks' [-Wunused-function]
STBIDEF int      stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user)
                 ^
../inst/include/stb/stb_image.h:1372:13: warning: unused function 'stbi_is_hdr_from_memory' [-Wunused-function]
STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:1386:18: warning: unused function 'stbi_is_hdr' [-Wunused-function]
STBIDEF int      stbi_is_hdr          (char const *filename)
                 ^
../inst/include/stb/stb_image.h:7293:13: warning: unused function 'stbi_info_from_memory' [-Wunused-function]
STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7300:13: warning: unused function 'stbi_info_from_callbacks' [-Wunused-function]
STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7307:13: warning: unused function 'stbi_is_16_bit_from_memory' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:7314:13: warning: unused function 'stbi_is_16_bit_from_callbacks' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *c, void *user)
            ^
../inst/include/stb/stb_image.h:7250:13: warning: unused function 'stbi_info' [-Wunused-function]
STBIDEF int stbi_info(char const *filename, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7271:13: warning: unused function 'stbi_is_16_bit' [-Wunused-function]
STBIDEF int stbi_is_16_bit(char const *filename)
            ^
../inst/include/stb/stb_image.h:4742:14: warning: unused function 'stbi_set_unpremultiply_on_load' [-Wunused-function]
STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply)
             ^
../inst/include/stb/stb_image.h:4747:14: warning: unused function 'stbi_convert_iphone_png_to_rgb' [-Wunused-function]
STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert)
             ^
../inst/include/stb/stb_image.h:999:14: warning: unused function 'stbi_set_flip_vertically_on_load' [-Wunused-function]
STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip)
             ^
../inst/include/stb/stb_image.h:4260:15: warning: unused function 'stbi_zlib_decode_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4281:13: warning: unused function 'stbi_zlib_decode_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, char const *ibuffer, int ilen)
            ^
../inst/include/stb/stb_image.h:4292:15: warning: unused function 'stbi_zlib_decode_noheader_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_noheader_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4308:13: warning: unused function 'stbi_zlib_decode_noheader_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen)
            ^
In file included from kernel_pca.cpp:9:
In file included from ../inst/include/mlpack/methods/kernel_pca/kernel_pca_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:32:
In file included from ../inst/include/mlpack/core/data/save.hpp:24:
In file included from ../inst/include/mlpack/core/data/save_image.hpp:26:
../inst/include/stb/stb_image_write.h:1182:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/stb/stb_image_write.h:482:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:580:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:754:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/stb/stb_image_write.h:1514:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/stb/stb_image_write.h:266:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
35 warnings generated.
clang++ -arch arm64 -std=gnu++17 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppEnsmallen/include' -I/opt/R/arm64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2  -c kfn.cpp -o kfn.o
In file included from kfn.cpp:9:
In file included from ../inst/include/mlpack/methods/neighbor_search/kfn_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:31:
In file included from ../inst/include/mlpack/core/data/load.hpp:26:
In file included from ../inst/include/mlpack/core/data/load_image.hpp:29:
../inst/include/stb/stb_image.h:1284:18: warning: unused function 'stbi_load_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1291:18: warning: unused function 'stbi_load_from_callbacks' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1299:18: warning: unused function 'stbi_load_gif_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1270:18: warning: unused function 'stbi_load_16_from_memory' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1277:18: warning: unused function 'stbi_load_16_from_callbacks' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1257:18: warning: unused function 'stbi_load_16' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16(char const *filename, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1333:16: warning: unused function 'stbi_loadf_from_memory' [-Wunused-function]
STBIDEF float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1340:16: warning: unused function 'stbi_loadf_from_callbacks' [-Wunused-function]
STBIDEF float *stbi_loadf_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1348:16: warning: unused function 'stbi_loadf' [-Wunused-function]
STBIDEF float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1436:16: warning: unused function 'stbi_hdr_to_ldr_gamma' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1/gamma; }
               ^
../inst/include/stb/stb_image.h:1437:16: warning: unused function 'stbi_hdr_to_ldr_scale' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1/scale; }
               ^
../inst/include/stb/stb_image.h:1430:16: warning: unused function 'stbi_ldr_to_hdr_gamma' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; }
               ^
../inst/include/stb/stb_image.h:1431:16: warning: unused function 'stbi_ldr_to_hdr_scale' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; }
               ^
../inst/include/stb/stb_image.h:1414:18: warning: unused function 'stbi_is_hdr_from_callbacks' [-Wunused-function]
STBIDEF int      stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user)
                 ^
../inst/include/stb/stb_image.h:1372:13: warning: unused function 'stbi_is_hdr_from_memory' [-Wunused-function]
STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:1386:18: warning: unused function 'stbi_is_hdr' [-Wunused-function]
STBIDEF int      stbi_is_hdr          (char const *filename)
                 ^
../inst/include/stb/stb_image.h:7293:13: warning: unused function 'stbi_info_from_memory' [-Wunused-function]
STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7300:13: warning: unused function 'stbi_info_from_callbacks' [-Wunused-function]
STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7307:13: warning: unused function 'stbi_is_16_bit_from_memory' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:7314:13: warning: unused function 'stbi_is_16_bit_from_callbacks' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *c, void *user)
            ^
../inst/include/stb/stb_image.h:7250:13: warning: unused function 'stbi_info' [-Wunused-function]
STBIDEF int stbi_info(char const *filename, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7271:13: warning: unused function 'stbi_is_16_bit' [-Wunused-function]
STBIDEF int stbi_is_16_bit(char const *filename)
            ^
../inst/include/stb/stb_image.h:4742:14: warning: unused function 'stbi_set_unpremultiply_on_load' [-Wunused-function]
STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply)
             ^
../inst/include/stb/stb_image.h:4747:14: warning: unused function 'stbi_convert_iphone_png_to_rgb' [-Wunused-function]
STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert)
             ^
../inst/include/stb/stb_image.h:999:14: warning: unused function 'stbi_set_flip_vertically_on_load' [-Wunused-function]
STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip)
             ^
../inst/include/stb/stb_image.h:4260:15: warning: unused function 'stbi_zlib_decode_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4281:13: warning: unused function 'stbi_zlib_decode_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, char const *ibuffer, int ilen)
            ^
../inst/include/stb/stb_image.h:4292:15: warning: unused function 'stbi_zlib_decode_noheader_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_noheader_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4308:13: warning: unused function 'stbi_zlib_decode_noheader_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen)
            ^
In file included from kfn.cpp:9:
In file included from ../inst/include/mlpack/methods/neighbor_search/kfn_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:32:
In file included from ../inst/include/mlpack/core/data/save.hpp:24:
In file included from ../inst/include/mlpack/core/data/save_image.hpp:26:
../inst/include/stb/stb_image_write.h:1182:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/stb/stb_image_write.h:482:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:580:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:754:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/stb/stb_image_write.h:1514:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/stb/stb_image_write.h:266:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
35 warnings generated.
clang++ -arch arm64 -std=gnu++17 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppEnsmallen/include' -I/opt/R/arm64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2  -c kmeans.cpp -o kmeans.o
In file included from kmeans.cpp:9:
In file included from ../inst/include/mlpack/methods/kmeans/kmeans_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:31:
In file included from ../inst/include/mlpack/core/data/load.hpp:26:
In file included from ../inst/include/mlpack/core/data/load_image.hpp:29:
../inst/include/stb/stb_image.h:1284:18: warning: unused function 'stbi_load_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1291:18: warning: unused function 'stbi_load_from_callbacks' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1299:18: warning: unused function 'stbi_load_gif_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1270:18: warning: unused function 'stbi_load_16_from_memory' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1277:18: warning: unused function 'stbi_load_16_from_callbacks' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1257:18: warning: unused function 'stbi_load_16' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16(char const *filename, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1333:16: warning: unused function 'stbi_loadf_from_memory' [-Wunused-function]
STBIDEF float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1340:16: warning: unused function 'stbi_loadf_from_callbacks' [-Wunused-function]
STBIDEF float *stbi_loadf_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1348:16: warning: unused function 'stbi_loadf' [-Wunused-function]
STBIDEF float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1436:16: warning: unused function 'stbi_hdr_to_ldr_gamma' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1/gamma; }
               ^
../inst/include/stb/stb_image.h:1437:16: warning: unused function 'stbi_hdr_to_ldr_scale' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1/scale; }
               ^
../inst/include/stb/stb_image.h:1430:16: warning: unused function 'stbi_ldr_to_hdr_gamma' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; }
               ^
../inst/include/stb/stb_image.h:1431:16: warning: unused function 'stbi_ldr_to_hdr_scale' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; }
               ^
../inst/include/stb/stb_image.h:1414:18: warning: unused function 'stbi_is_hdr_from_callbacks' [-Wunused-function]
STBIDEF int      stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user)
                 ^
../inst/include/stb/stb_image.h:1372:13: warning: unused function 'stbi_is_hdr_from_memory' [-Wunused-function]
STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:1386:18: warning: unused function 'stbi_is_hdr' [-Wunused-function]
STBIDEF int      stbi_is_hdr          (char const *filename)
                 ^
../inst/include/stb/stb_image.h:7293:13: warning: unused function 'stbi_info_from_memory' [-Wunused-function]
STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7300:13: warning: unused function 'stbi_info_from_callbacks' [-Wunused-function]
STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7307:13: warning: unused function 'stbi_is_16_bit_from_memory' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:7314:13: warning: unused function 'stbi_is_16_bit_from_callbacks' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *c, void *user)
            ^
../inst/include/stb/stb_image.h:7250:13: warning: unused function 'stbi_info' [-Wunused-function]
STBIDEF int stbi_info(char const *filename, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7271:13: warning: unused function 'stbi_is_16_bit' [-Wunused-function]
STBIDEF int stbi_is_16_bit(char const *filename)
            ^
../inst/include/stb/stb_image.h:4742:14: warning: unused function 'stbi_set_unpremultiply_on_load' [-Wunused-function]
STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply)
             ^
../inst/include/stb/stb_image.h:4747:14: warning: unused function 'stbi_convert_iphone_png_to_rgb' [-Wunused-function]
STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert)
             ^
../inst/include/stb/stb_image.h:999:14: warning: unused function 'stbi_set_flip_vertically_on_load' [-Wunused-function]
STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip)
             ^
../inst/include/stb/stb_image.h:4260:15: warning: unused function 'stbi_zlib_decode_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4281:13: warning: unused function 'stbi_zlib_decode_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, char const *ibuffer, int ilen)
            ^
../inst/include/stb/stb_image.h:4292:15: warning: unused function 'stbi_zlib_decode_noheader_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_noheader_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4308:13: warning: unused function 'stbi_zlib_decode_noheader_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen)
            ^
In file included from kmeans.cpp:9:
In file included from ../inst/include/mlpack/methods/kmeans/kmeans_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:32:
In file included from ../inst/include/mlpack/core/data/save.hpp:24:
In file included from ../inst/include/mlpack/core/data/save_image.hpp:26:
../inst/include/stb/stb_image_write.h:1182:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/stb/stb_image_write.h:482:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:580:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:754:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/stb/stb_image_write.h:1514:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/stb/stb_image_write.h:266:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
35 warnings generated.
clang++ -arch arm64 -std=gnu++17 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppEnsmallen/include' -I/opt/R/arm64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2  -c knn.cpp -o knn.o
In file included from knn.cpp:9:
In file included from ../inst/include/mlpack/methods/neighbor_search/knn_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:31:
In file included from ../inst/include/mlpack/core/data/load.hpp:26:
In file included from ../inst/include/mlpack/core/data/load_image.hpp:29:
../inst/include/stb/stb_image.h:1284:18: warning: unused function 'stbi_load_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1291:18: warning: unused function 'stbi_load_from_callbacks' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1299:18: warning: unused function 'stbi_load_gif_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1270:18: warning: unused function 'stbi_load_16_from_memory' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1277:18: warning: unused function 'stbi_load_16_from_callbacks' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1257:18: warning: unused function 'stbi_load_16' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16(char const *filename, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1333:16: warning: unused function 'stbi_loadf_from_memory' [-Wunused-function]
STBIDEF float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1340:16: warning: unused function 'stbi_loadf_from_callbacks' [-Wunused-function]
STBIDEF float *stbi_loadf_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1348:16: warning: unused function 'stbi_loadf' [-Wunused-function]
STBIDEF float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1436:16: warning: unused function 'stbi_hdr_to_ldr_gamma' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1/gamma; }
               ^
../inst/include/stb/stb_image.h:1437:16: warning: unused function 'stbi_hdr_to_ldr_scale' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1/scale; }
               ^
../inst/include/stb/stb_image.h:1430:16: warning: unused function 'stbi_ldr_to_hdr_gamma' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; }
               ^
../inst/include/stb/stb_image.h:1431:16: warning: unused function 'stbi_ldr_to_hdr_scale' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; }
               ^
../inst/include/stb/stb_image.h:1414:18: warning: unused function 'stbi_is_hdr_from_callbacks' [-Wunused-function]
STBIDEF int      stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user)
                 ^
../inst/include/stb/stb_image.h:1372:13: warning: unused function 'stbi_is_hdr_from_memory' [-Wunused-function]
STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:1386:18: warning: unused function 'stbi_is_hdr' [-Wunused-function]
STBIDEF int      stbi_is_hdr          (char const *filename)
                 ^
../inst/include/stb/stb_image.h:7293:13: warning: unused function 'stbi_info_from_memory' [-Wunused-function]
STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7300:13: warning: unused function 'stbi_info_from_callbacks' [-Wunused-function]
STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7307:13: warning: unused function 'stbi_is_16_bit_from_memory' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:7314:13: warning: unused function 'stbi_is_16_bit_from_callbacks' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *c, void *user)
            ^
../inst/include/stb/stb_image.h:7250:13: warning: unused function 'stbi_info' [-Wunused-function]
STBIDEF int stbi_info(char const *filename, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7271:13: warning: unused function 'stbi_is_16_bit' [-Wunused-function]
STBIDEF int stbi_is_16_bit(char const *filename)
            ^
../inst/include/stb/stb_image.h:4742:14: warning: unused function 'stbi_set_unpremultiply_on_load' [-Wunused-function]
STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply)
             ^
../inst/include/stb/stb_image.h:4747:14: warning: unused function 'stbi_convert_iphone_png_to_rgb' [-Wunused-function]
STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert)
             ^
../inst/include/stb/stb_image.h:999:14: warning: unused function 'stbi_set_flip_vertically_on_load' [-Wunused-function]
STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip)
             ^
../inst/include/stb/stb_image.h:4260:15: warning: unused function 'stbi_zlib_decode_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4281:13: warning: unused function 'stbi_zlib_decode_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, char const *ibuffer, int ilen)
            ^
../inst/include/stb/stb_image.h:4292:15: warning: unused function 'stbi_zlib_decode_noheader_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_noheader_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4308:13: warning: unused function 'stbi_zlib_decode_noheader_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen)
            ^
In file included from knn.cpp:9:
In file included from ../inst/include/mlpack/methods/neighbor_search/knn_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:32:
In file included from ../inst/include/mlpack/core/data/save.hpp:24:
In file included from ../inst/include/mlpack/core/data/save_image.hpp:26:
../inst/include/stb/stb_image_write.h:1182:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/stb/stb_image_write.h:482:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:580:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:754:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/stb/stb_image_write.h:1514:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/stb/stb_image_write.h:266:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
35 warnings generated.
clang++ -arch arm64 -std=gnu++17 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppEnsmallen/include' -I/opt/R/arm64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2  -c krann.cpp -o krann.o
In file included from krann.cpp:9:
In file included from ../inst/include/mlpack/methods/rann/krann_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:31:
In file included from ../inst/include/mlpack/core/data/load.hpp:26:
In file included from ../inst/include/mlpack/core/data/load_image.hpp:29:
../inst/include/stb/stb_image.h:1284:18: warning: unused function 'stbi_load_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1291:18: warning: unused function 'stbi_load_from_callbacks' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1299:18: warning: unused function 'stbi_load_gif_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1270:18: warning: unused function 'stbi_load_16_from_memory' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1277:18: warning: unused function 'stbi_load_16_from_callbacks' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1257:18: warning: unused function 'stbi_load_16' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16(char const *filename, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1333:16: warning: unused function 'stbi_loadf_from_memory' [-Wunused-function]
STBIDEF float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1340:16: warning: unused function 'stbi_loadf_from_callbacks' [-Wunused-function]
STBIDEF float *stbi_loadf_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1348:16: warning: unused function 'stbi_loadf' [-Wunused-function]
STBIDEF float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1436:16: warning: unused function 'stbi_hdr_to_ldr_gamma' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1/gamma; }
               ^
../inst/include/stb/stb_image.h:1437:16: warning: unused function 'stbi_hdr_to_ldr_scale' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1/scale; }
               ^
../inst/include/stb/stb_image.h:1430:16: warning: unused function 'stbi_ldr_to_hdr_gamma' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; }
               ^
../inst/include/stb/stb_image.h:1431:16: warning: unused function 'stbi_ldr_to_hdr_scale' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; }
               ^
../inst/include/stb/stb_image.h:1414:18: warning: unused function 'stbi_is_hdr_from_callbacks' [-Wunused-function]
STBIDEF int      stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user)
                 ^
../inst/include/stb/stb_image.h:1372:13: warning: unused function 'stbi_is_hdr_from_memory' [-Wunused-function]
STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:1386:18: warning: unused function 'stbi_is_hdr' [-Wunused-function]
STBIDEF int      stbi_is_hdr          (char const *filename)
                 ^
../inst/include/stb/stb_image.h:7293:13: warning: unused function 'stbi_info_from_memory' [-Wunused-function]
STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7300:13: warning: unused function 'stbi_info_from_callbacks' [-Wunused-function]
STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7307:13: warning: unused function 'stbi_is_16_bit_from_memory' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:7314:13: warning: unused function 'stbi_is_16_bit_from_callbacks' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *c, void *user)
            ^
../inst/include/stb/stb_image.h:7250:13: warning: unused function 'stbi_info' [-Wunused-function]
STBIDEF int stbi_info(char const *filename, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7271:13: warning: unused function 'stbi_is_16_bit' [-Wunused-function]
STBIDEF int stbi_is_16_bit(char const *filename)
            ^
../inst/include/stb/stb_image.h:4742:14: warning: unused function 'stbi_set_unpremultiply_on_load' [-Wunused-function]
STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply)
             ^
../inst/include/stb/stb_image.h:4747:14: warning: unused function 'stbi_convert_iphone_png_to_rgb' [-Wunused-function]
STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert)
             ^
../inst/include/stb/stb_image.h:999:14: warning: unused function 'stbi_set_flip_vertically_on_load' [-Wunused-function]
STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip)
             ^
../inst/include/stb/stb_image.h:4260:15: warning: unused function 'stbi_zlib_decode_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4281:13: warning: unused function 'stbi_zlib_decode_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, char const *ibuffer, int ilen)
            ^
../inst/include/stb/stb_image.h:4292:15: warning: unused function 'stbi_zlib_decode_noheader_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_noheader_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4308:13: warning: unused function 'stbi_zlib_decode_noheader_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen)
            ^
In file included from krann.cpp:9:
In file included from ../inst/include/mlpack/methods/rann/krann_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:32:
In file included from ../inst/include/mlpack/core/data/save.hpp:24:
In file included from ../inst/include/mlpack/core/data/save_image.hpp:26:
../inst/include/stb/stb_image_write.h:1182:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/stb/stb_image_write.h:482:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:580:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:754:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/stb/stb_image_write.h:1514:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/stb/stb_image_write.h:266:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
35 warnings generated.
clang++ -arch arm64 -std=gnu++17 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppEnsmallen/include' -I/opt/R/arm64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2  -c lars.cpp -o lars.o
In file included from lars.cpp:9:
In file included from ../inst/include/mlpack/methods/lars/lars_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:31:
In file included from ../inst/include/mlpack/core/data/load.hpp:26:
In file included from ../inst/include/mlpack/core/data/load_image.hpp:29:
../inst/include/stb/stb_image.h:1284:18: warning: unused function 'stbi_load_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1291:18: warning: unused function 'stbi_load_from_callbacks' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1299:18: warning: unused function 'stbi_load_gif_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1270:18: warning: unused function 'stbi_load_16_from_memory' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1277:18: warning: unused function 'stbi_load_16_from_callbacks' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1257:18: warning: unused function 'stbi_load_16' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16(char const *filename, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1333:16: warning: unused function 'stbi_loadf_from_memory' [-Wunused-function]
STBIDEF float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1340:16: warning: unused function 'stbi_loadf_from_callbacks' [-Wunused-function]
STBIDEF float *stbi_loadf_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1348:16: warning: unused function 'stbi_loadf' [-Wunused-function]
STBIDEF float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1436:16: warning: unused function 'stbi_hdr_to_ldr_gamma' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1/gamma; }
               ^
../inst/include/stb/stb_image.h:1437:16: warning: unused function 'stbi_hdr_to_ldr_scale' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1/scale; }
               ^
../inst/include/stb/stb_image.h:1430:16: warning: unused function 'stbi_ldr_to_hdr_gamma' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; }
               ^
../inst/include/stb/stb_image.h:1431:16: warning: unused function 'stbi_ldr_to_hdr_scale' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; }
               ^
../inst/include/stb/stb_image.h:1414:18: warning: unused function 'stbi_is_hdr_from_callbacks' [-Wunused-function]
STBIDEF int      stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user)
                 ^
../inst/include/stb/stb_image.h:1372:13: warning: unused function 'stbi_is_hdr_from_memory' [-Wunused-function]
STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:1386:18: warning: unused function 'stbi_is_hdr' [-Wunused-function]
STBIDEF int      stbi_is_hdr          (char const *filename)
                 ^
../inst/include/stb/stb_image.h:7293:13: warning: unused function 'stbi_info_from_memory' [-Wunused-function]
STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7300:13: warning: unused function 'stbi_info_from_callbacks' [-Wunused-function]
STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7307:13: warning: unused function 'stbi_is_16_bit_from_memory' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:7314:13: warning: unused function 'stbi_is_16_bit_from_callbacks' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *c, void *user)
            ^
../inst/include/stb/stb_image.h:7250:13: warning: unused function 'stbi_info' [-Wunused-function]
STBIDEF int stbi_info(char const *filename, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7271:13: warning: unused function 'stbi_is_16_bit' [-Wunused-function]
STBIDEF int stbi_is_16_bit(char const *filename)
            ^
../inst/include/stb/stb_image.h:4742:14: warning: unused function 'stbi_set_unpremultiply_on_load' [-Wunused-function]
STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply)
             ^
../inst/include/stb/stb_image.h:4747:14: warning: unused function 'stbi_convert_iphone_png_to_rgb' [-Wunused-function]
STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert)
             ^
../inst/include/stb/stb_image.h:999:14: warning: unused function 'stbi_set_flip_vertically_on_load' [-Wunused-function]
STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip)
             ^
../inst/include/stb/stb_image.h:4260:15: warning: unused function 'stbi_zlib_decode_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4281:13: warning: unused function 'stbi_zlib_decode_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, char const *ibuffer, int ilen)
            ^
../inst/include/stb/stb_image.h:4292:15: warning: unused function 'stbi_zlib_decode_noheader_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_noheader_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4308:13: warning: unused function 'stbi_zlib_decode_noheader_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen)
            ^
In file included from lars.cpp:9:
In file included from ../inst/include/mlpack/methods/lars/lars_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:32:
In file included from ../inst/include/mlpack/core/data/save.hpp:24:
In file included from ../inst/include/mlpack/core/data/save_image.hpp:26:
../inst/include/stb/stb_image_write.h:1182:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/stb/stb_image_write.h:482:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:580:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:754:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/stb/stb_image_write.h:1514:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/stb/stb_image_write.h:266:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
35 warnings generated.
clang++ -arch arm64 -std=gnu++17 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppEnsmallen/include' -I/opt/R/arm64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2  -c linear_regression.cpp -o linear_regression.o
In file included from linear_regression.cpp:9:
In file included from ../inst/include/mlpack/methods/linear_regression/linear_regression_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:31:
In file included from ../inst/include/mlpack/core/data/load.hpp:26:
In file included from ../inst/include/mlpack/core/data/load_image.hpp:29:
../inst/include/stb/stb_image.h:1284:18: warning: unused function 'stbi_load_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1291:18: warning: unused function 'stbi_load_from_callbacks' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1299:18: warning: unused function 'stbi_load_gif_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1270:18: warning: unused function 'stbi_load_16_from_memory' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1277:18: warning: unused function 'stbi_load_16_from_callbacks' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1257:18: warning: unused function 'stbi_load_16' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16(char const *filename, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1333:16: warning: unused function 'stbi_loadf_from_memory' [-Wunused-function]
STBIDEF float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1340:16: warning: unused function 'stbi_loadf_from_callbacks' [-Wunused-function]
STBIDEF float *stbi_loadf_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1348:16: warning: unused function 'stbi_loadf' [-Wunused-function]
STBIDEF float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1436:16: warning: unused function 'stbi_hdr_to_ldr_gamma' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1/gamma; }
               ^
../inst/include/stb/stb_image.h:1437:16: warning: unused function 'stbi_hdr_to_ldr_scale' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1/scale; }
               ^
../inst/include/stb/stb_image.h:1430:16: warning: unused function 'stbi_ldr_to_hdr_gamma' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; }
               ^
../inst/include/stb/stb_image.h:1431:16: warning: unused function 'stbi_ldr_to_hdr_scale' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; }
               ^
../inst/include/stb/stb_image.h:1414:18: warning: unused function 'stbi_is_hdr_from_callbacks' [-Wunused-function]
STBIDEF int      stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user)
                 ^
../inst/include/stb/stb_image.h:1372:13: warning: unused function 'stbi_is_hdr_from_memory' [-Wunused-function]
STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:1386:18: warning: unused function 'stbi_is_hdr' [-Wunused-function]
STBIDEF int      stbi_is_hdr          (char const *filename)
                 ^
../inst/include/stb/stb_image.h:7293:13: warning: unused function 'stbi_info_from_memory' [-Wunused-function]
STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7300:13: warning: unused function 'stbi_info_from_callbacks' [-Wunused-function]
STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7307:13: warning: unused function 'stbi_is_16_bit_from_memory' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:7314:13: warning: unused function 'stbi_is_16_bit_from_callbacks' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *c, void *user)
            ^
../inst/include/stb/stb_image.h:7250:13: warning: unused function 'stbi_info' [-Wunused-function]
STBIDEF int stbi_info(char const *filename, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7271:13: warning: unused function 'stbi_is_16_bit' [-Wunused-function]
STBIDEF int stbi_is_16_bit(char const *filename)
            ^
../inst/include/stb/stb_image.h:4742:14: warning: unused function 'stbi_set_unpremultiply_on_load' [-Wunused-function]
STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply)
             ^
../inst/include/stb/stb_image.h:4747:14: warning: unused function 'stbi_convert_iphone_png_to_rgb' [-Wunused-function]
STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert)
             ^
../inst/include/stb/stb_image.h:999:14: warning: unused function 'stbi_set_flip_vertically_on_load' [-Wunused-function]
STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip)
             ^
../inst/include/stb/stb_image.h:4260:15: warning: unused function 'stbi_zlib_decode_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4281:13: warning: unused function 'stbi_zlib_decode_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, char const *ibuffer, int ilen)
            ^
../inst/include/stb/stb_image.h:4292:15: warning: unused function 'stbi_zlib_decode_noheader_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_noheader_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4308:13: warning: unused function 'stbi_zlib_decode_noheader_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen)
            ^
In file included from linear_regression.cpp:9:
In file included from ../inst/include/mlpack/methods/linear_regression/linear_regression_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:32:
In file included from ../inst/include/mlpack/core/data/save.hpp:24:
In file included from ../inst/include/mlpack/core/data/save_image.hpp:26:
../inst/include/stb/stb_image_write.h:1182:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/stb/stb_image_write.h:482:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:580:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:754:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/stb/stb_image_write.h:1514:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/stb/stb_image_write.h:266:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
35 warnings generated.
clang++ -arch arm64 -std=gnu++17 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppEnsmallen/include' -I/opt/R/arm64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2  -c linear_svm.cpp -o linear_svm.o
In file included from linear_svm.cpp:9:
In file included from ../inst/include/mlpack/methods/linear_svm/linear_svm_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:31:
In file included from ../inst/include/mlpack/core/data/load.hpp:26:
In file included from ../inst/include/mlpack/core/data/load_image.hpp:29:
../inst/include/stb/stb_image.h:1284:18: warning: unused function 'stbi_load_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1291:18: warning: unused function 'stbi_load_from_callbacks' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1299:18: warning: unused function 'stbi_load_gif_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1270:18: warning: unused function 'stbi_load_16_from_memory' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1277:18: warning: unused function 'stbi_load_16_from_callbacks' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1257:18: warning: unused function 'stbi_load_16' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16(char const *filename, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1333:16: warning: unused function 'stbi_loadf_from_memory' [-Wunused-function]
STBIDEF float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1340:16: warning: unused function 'stbi_loadf_from_callbacks' [-Wunused-function]
STBIDEF float *stbi_loadf_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1348:16: warning: unused function 'stbi_loadf' [-Wunused-function]
STBIDEF float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1436:16: warning: unused function 'stbi_hdr_to_ldr_gamma' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1/gamma; }
               ^
../inst/include/stb/stb_image.h:1437:16: warning: unused function 'stbi_hdr_to_ldr_scale' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1/scale; }
               ^
../inst/include/stb/stb_image.h:1430:16: warning: unused function 'stbi_ldr_to_hdr_gamma' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; }
               ^
../inst/include/stb/stb_image.h:1431:16: warning: unused function 'stbi_ldr_to_hdr_scale' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; }
               ^
../inst/include/stb/stb_image.h:1414:18: warning: unused function 'stbi_is_hdr_from_callbacks' [-Wunused-function]
STBIDEF int      stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user)
                 ^
../inst/include/stb/stb_image.h:1372:13: warning: unused function 'stbi_is_hdr_from_memory' [-Wunused-function]
STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:1386:18: warning: unused function 'stbi_is_hdr' [-Wunused-function]
STBIDEF int      stbi_is_hdr          (char const *filename)
                 ^
../inst/include/stb/stb_image.h:7293:13: warning: unused function 'stbi_info_from_memory' [-Wunused-function]
STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7300:13: warning: unused function 'stbi_info_from_callbacks' [-Wunused-function]
STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7307:13: warning: unused function 'stbi_is_16_bit_from_memory' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:7314:13: warning: unused function 'stbi_is_16_bit_from_callbacks' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *c, void *user)
            ^
../inst/include/stb/stb_image.h:7250:13: warning: unused function 'stbi_info' [-Wunused-function]
STBIDEF int stbi_info(char const *filename, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7271:13: warning: unused function 'stbi_is_16_bit' [-Wunused-function]
STBIDEF int stbi_is_16_bit(char const *filename)
            ^
../inst/include/stb/stb_image.h:4742:14: warning: unused function 'stbi_set_unpremultiply_on_load' [-Wunused-function]
STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply)
             ^
../inst/include/stb/stb_image.h:4747:14: warning: unused function 'stbi_convert_iphone_png_to_rgb' [-Wunused-function]
STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert)
             ^
../inst/include/stb/stb_image.h:999:14: warning: unused function 'stbi_set_flip_vertically_on_load' [-Wunused-function]
STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip)
             ^
../inst/include/stb/stb_image.h:4260:15: warning: unused function 'stbi_zlib_decode_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4281:13: warning: unused function 'stbi_zlib_decode_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, char const *ibuffer, int ilen)
            ^
../inst/include/stb/stb_image.h:4292:15: warning: unused function 'stbi_zlib_decode_noheader_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_noheader_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4308:13: warning: unused function 'stbi_zlib_decode_noheader_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen)
            ^
In file included from linear_svm.cpp:9:
In file included from ../inst/include/mlpack/methods/linear_svm/linear_svm_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:32:
In file included from ../inst/include/mlpack/core/data/save.hpp:24:
In file included from ../inst/include/mlpack/core/data/save_image.hpp:26:
../inst/include/stb/stb_image_write.h:1182:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/stb/stb_image_write.h:482:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:580:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:754:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/stb/stb_image_write.h:1514:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/stb/stb_image_write.h:266:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
35 warnings generated.
clang++ -arch arm64 -std=gnu++17 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppEnsmallen/include' -I/opt/R/arm64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2  -c lmnn.cpp -o lmnn.o
In file included from lmnn.cpp:9:
In file included from ../inst/include/mlpack/methods/lmnn/lmnn_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:31:
In file included from ../inst/include/mlpack/core/data/load.hpp:26:
In file included from ../inst/include/mlpack/core/data/load_image.hpp:29:
../inst/include/stb/stb_image.h:1284:18: warning: unused function 'stbi_load_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1291:18: warning: unused function 'stbi_load_from_callbacks' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1299:18: warning: unused function 'stbi_load_gif_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1270:18: warning: unused function 'stbi_load_16_from_memory' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1277:18: warning: unused function 'stbi_load_16_from_callbacks' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1257:18: warning: unused function 'stbi_load_16' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16(char const *filename, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1333:16: warning: unused function 'stbi_loadf_from_memory' [-Wunused-function]
STBIDEF float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1340:16: warning: unused function 'stbi_loadf_from_callbacks' [-Wunused-function]
STBIDEF float *stbi_loadf_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1348:16: warning: unused function 'stbi_loadf' [-Wunused-function]
STBIDEF float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1436:16: warning: unused function 'stbi_hdr_to_ldr_gamma' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1/gamma; }
               ^
../inst/include/stb/stb_image.h:1437:16: warning: unused function 'stbi_hdr_to_ldr_scale' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1/scale; }
               ^
../inst/include/stb/stb_image.h:1430:16: warning: unused function 'stbi_ldr_to_hdr_gamma' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; }
               ^
../inst/include/stb/stb_image.h:1431:16: warning: unused function 'stbi_ldr_to_hdr_scale' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; }
               ^
../inst/include/stb/stb_image.h:1414:18: warning: unused function 'stbi_is_hdr_from_callbacks' [-Wunused-function]
STBIDEF int      stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user)
                 ^
../inst/include/stb/stb_image.h:1372:13: warning: unused function 'stbi_is_hdr_from_memory' [-Wunused-function]
STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:1386:18: warning: unused function 'stbi_is_hdr' [-Wunused-function]
STBIDEF int      stbi_is_hdr          (char const *filename)
                 ^
../inst/include/stb/stb_image.h:7293:13: warning: unused function 'stbi_info_from_memory' [-Wunused-function]
STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7300:13: warning: unused function 'stbi_info_from_callbacks' [-Wunused-function]
STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7307:13: warning: unused function 'stbi_is_16_bit_from_memory' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:7314:13: warning: unused function 'stbi_is_16_bit_from_callbacks' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *c, void *user)
            ^
../inst/include/stb/stb_image.h:7250:13: warning: unused function 'stbi_info' [-Wunused-function]
STBIDEF int stbi_info(char const *filename, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7271:13: warning: unused function 'stbi_is_16_bit' [-Wunused-function]
STBIDEF int stbi_is_16_bit(char const *filename)
            ^
../inst/include/stb/stb_image.h:4742:14: warning: unused function 'stbi_set_unpremultiply_on_load' [-Wunused-function]
STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply)
             ^
../inst/include/stb/stb_image.h:4747:14: warning: unused function 'stbi_convert_iphone_png_to_rgb' [-Wunused-function]
STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert)
             ^
../inst/include/stb/stb_image.h:999:14: warning: unused function 'stbi_set_flip_vertically_on_load' [-Wunused-function]
STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip)
             ^
../inst/include/stb/stb_image.h:4260:15: warning: unused function 'stbi_zlib_decode_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4281:13: warning: unused function 'stbi_zlib_decode_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, char const *ibuffer, int ilen)
            ^
../inst/include/stb/stb_image.h:4292:15: warning: unused function 'stbi_zlib_decode_noheader_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_noheader_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4308:13: warning: unused function 'stbi_zlib_decode_noheader_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen)
            ^
In file included from lmnn.cpp:9:
In file included from ../inst/include/mlpack/methods/lmnn/lmnn_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:32:
In file included from ../inst/include/mlpack/core/data/save.hpp:24:
In file included from ../inst/include/mlpack/core/data/save_image.hpp:26:
../inst/include/stb/stb_image_write.h:1182:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/stb/stb_image_write.h:482:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:580:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:754:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/stb/stb_image_write.h:1514:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/stb/stb_image_write.h:266:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
35 warnings generated.
clang++ -arch arm64 -std=gnu++17 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppEnsmallen/include' -I/opt/R/arm64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2  -c local_coordinate_coding.cpp -o local_coordinate_coding.o
In file included from local_coordinate_coding.cpp:9:
In file included from ../inst/include/mlpack/methods/local_coordinate_coding/local_coordinate_coding_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:31:
In file included from ../inst/include/mlpack/core/data/load.hpp:26:
In file included from ../inst/include/mlpack/core/data/load_image.hpp:29:
../inst/include/stb/stb_image.h:1284:18: warning: unused function 'stbi_load_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1291:18: warning: unused function 'stbi_load_from_callbacks' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1299:18: warning: unused function 'stbi_load_gif_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1270:18: warning: unused function 'stbi_load_16_from_memory' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1277:18: warning: unused function 'stbi_load_16_from_callbacks' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1257:18: warning: unused function 'stbi_load_16' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16(char const *filename, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1333:16: warning: unused function 'stbi_loadf_from_memory' [-Wunused-function]
STBIDEF float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1340:16: warning: unused function 'stbi_loadf_from_callbacks' [-Wunused-function]
STBIDEF float *stbi_loadf_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1348:16: warning: unused function 'stbi_loadf' [-Wunused-function]
STBIDEF float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1436:16: warning: unused function 'stbi_hdr_to_ldr_gamma' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1/gamma; }
               ^
../inst/include/stb/stb_image.h:1437:16: warning: unused function 'stbi_hdr_to_ldr_scale' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1/scale; }
               ^
../inst/include/stb/stb_image.h:1430:16: warning: unused function 'stbi_ldr_to_hdr_gamma' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; }
               ^
../inst/include/stb/stb_image.h:1431:16: warning: unused function 'stbi_ldr_to_hdr_scale' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; }
               ^
../inst/include/stb/stb_image.h:1414:18: warning: unused function 'stbi_is_hdr_from_callbacks' [-Wunused-function]
STBIDEF int      stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user)
                 ^
../inst/include/stb/stb_image.h:1372:13: warning: unused function 'stbi_is_hdr_from_memory' [-Wunused-function]
STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:1386:18: warning: unused function 'stbi_is_hdr' [-Wunused-function]
STBIDEF int      stbi_is_hdr          (char const *filename)
                 ^
../inst/include/stb/stb_image.h:7293:13: warning: unused function 'stbi_info_from_memory' [-Wunused-function]
STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7300:13: warning: unused function 'stbi_info_from_callbacks' [-Wunused-function]
STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7307:13: warning: unused function 'stbi_is_16_bit_from_memory' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:7314:13: warning: unused function 'stbi_is_16_bit_from_callbacks' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *c, void *user)
            ^
../inst/include/stb/stb_image.h:7250:13: warning: unused function 'stbi_info' [-Wunused-function]
STBIDEF int stbi_info(char const *filename, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7271:13: warning: unused function 'stbi_is_16_bit' [-Wunused-function]
STBIDEF int stbi_is_16_bit(char const *filename)
            ^
../inst/include/stb/stb_image.h:4742:14: warning: unused function 'stbi_set_unpremultiply_on_load' [-Wunused-function]
STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply)
             ^
../inst/include/stb/stb_image.h:4747:14: warning: unused function 'stbi_convert_iphone_png_to_rgb' [-Wunused-function]
STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert)
             ^
../inst/include/stb/stb_image.h:999:14: warning: unused function 'stbi_set_flip_vertically_on_load' [-Wunused-function]
STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip)
             ^
../inst/include/stb/stb_image.h:4260:15: warning: unused function 'stbi_zlib_decode_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4281:13: warning: unused function 'stbi_zlib_decode_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, char const *ibuffer, int ilen)
            ^
../inst/include/stb/stb_image.h:4292:15: warning: unused function 'stbi_zlib_decode_noheader_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_noheader_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4308:13: warning: unused function 'stbi_zlib_decode_noheader_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen)
            ^
In file included from local_coordinate_coding.cpp:9:
In file included from ../inst/include/mlpack/methods/local_coordinate_coding/local_coordinate_coding_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:32:
In file included from ../inst/include/mlpack/core/data/save.hpp:24:
In file included from ../inst/include/mlpack/core/data/save_image.hpp:26:
../inst/include/stb/stb_image_write.h:1182:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/stb/stb_image_write.h:482:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:580:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:754:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/stb/stb_image_write.h:1514:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/stb/stb_image_write.h:266:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
35 warnings generated.
clang++ -arch arm64 -std=gnu++17 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppEnsmallen/include' -I/opt/R/arm64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2  -c logistic_regression.cpp -o logistic_regression.o
In file included from logistic_regression.cpp:9:
In file included from ../inst/include/mlpack/methods/logistic_regression/logistic_regression_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:31:
In file included from ../inst/include/mlpack/core/data/load.hpp:26:
In file included from ../inst/include/mlpack/core/data/load_image.hpp:29:
../inst/include/stb/stb_image.h:1284:18: warning: unused function 'stbi_load_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1291:18: warning: unused function 'stbi_load_from_callbacks' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1299:18: warning: unused function 'stbi_load_gif_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1270:18: warning: unused function 'stbi_load_16_from_memory' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1277:18: warning: unused function 'stbi_load_16_from_callbacks' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1257:18: warning: unused function 'stbi_load_16' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16(char const *filename, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1333:16: warning: unused function 'stbi_loadf_from_memory' [-Wunused-function]
STBIDEF float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1340:16: warning: unused function 'stbi_loadf_from_callbacks' [-Wunused-function]
STBIDEF float *stbi_loadf_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1348:16: warning: unused function 'stbi_loadf' [-Wunused-function]
STBIDEF float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1436:16: warning: unused function 'stbi_hdr_to_ldr_gamma' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1/gamma; }
               ^
../inst/include/stb/stb_image.h:1437:16: warning: unused function 'stbi_hdr_to_ldr_scale' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1/scale; }
               ^
../inst/include/stb/stb_image.h:1430:16: warning: unused function 'stbi_ldr_to_hdr_gamma' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; }
               ^
../inst/include/stb/stb_image.h:1431:16: warning: unused function 'stbi_ldr_to_hdr_scale' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; }
               ^
../inst/include/stb/stb_image.h:1414:18: warning: unused function 'stbi_is_hdr_from_callbacks' [-Wunused-function]
STBIDEF int      stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user)
                 ^
../inst/include/stb/stb_image.h:1372:13: warning: unused function 'stbi_is_hdr_from_memory' [-Wunused-function]
STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:1386:18: warning: unused function 'stbi_is_hdr' [-Wunused-function]
STBIDEF int      stbi_is_hdr          (char const *filename)
                 ^
../inst/include/stb/stb_image.h:7293:13: warning: unused function 'stbi_info_from_memory' [-Wunused-function]
STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7300:13: warning: unused function 'stbi_info_from_callbacks' [-Wunused-function]
STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7307:13: warning: unused function 'stbi_is_16_bit_from_memory' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:7314:13: warning: unused function 'stbi_is_16_bit_from_callbacks' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *c, void *user)
            ^
../inst/include/stb/stb_image.h:7250:13: warning: unused function 'stbi_info' [-Wunused-function]
STBIDEF int stbi_info(char const *filename, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7271:13: warning: unused function 'stbi_is_16_bit' [-Wunused-function]
STBIDEF int stbi_is_16_bit(char const *filename)
            ^
../inst/include/stb/stb_image.h:4742:14: warning: unused function 'stbi_set_unpremultiply_on_load' [-Wunused-function]
STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply)
             ^
../inst/include/stb/stb_image.h:4747:14: warning: unused function 'stbi_convert_iphone_png_to_rgb' [-Wunused-function]
STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert)
             ^
../inst/include/stb/stb_image.h:999:14: warning: unused function 'stbi_set_flip_vertically_on_load' [-Wunused-function]
STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip)
             ^
../inst/include/stb/stb_image.h:4260:15: warning: unused function 'stbi_zlib_decode_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4281:13: warning: unused function 'stbi_zlib_decode_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, char const *ibuffer, int ilen)
            ^
../inst/include/stb/stb_image.h:4292:15: warning: unused function 'stbi_zlib_decode_noheader_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_noheader_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4308:13: warning: unused function 'stbi_zlib_decode_noheader_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen)
            ^
In file included from logistic_regression.cpp:9:
In file included from ../inst/include/mlpack/methods/logistic_regression/logistic_regression_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:32:
In file included from ../inst/include/mlpack/core/data/save.hpp:24:
In file included from ../inst/include/mlpack/core/data/save_image.hpp:26:
../inst/include/stb/stb_image_write.h:1182:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/stb/stb_image_write.h:482:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:580:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:754:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/stb/stb_image_write.h:1514:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/stb/stb_image_write.h:266:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
35 warnings generated.
clang++ -arch arm64 -std=gnu++17 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppEnsmallen/include' -I/opt/R/arm64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2  -c lsh.cpp -o lsh.o
In file included from lsh.cpp:9:
In file included from ../inst/include/mlpack/methods/lsh/lsh_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:31:
In file included from ../inst/include/mlpack/core/data/load.hpp:26:
In file included from ../inst/include/mlpack/core/data/load_image.hpp:29:
../inst/include/stb/stb_image.h:1284:18: warning: unused function 'stbi_load_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1291:18: warning: unused function 'stbi_load_from_callbacks' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1299:18: warning: unused function 'stbi_load_gif_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1270:18: warning: unused function 'stbi_load_16_from_memory' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1277:18: warning: unused function 'stbi_load_16_from_callbacks' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1257:18: warning: unused function 'stbi_load_16' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16(char const *filename, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1333:16: warning: unused function 'stbi_loadf_from_memory' [-Wunused-function]
STBIDEF float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1340:16: warning: unused function 'stbi_loadf_from_callbacks' [-Wunused-function]
STBIDEF float *stbi_loadf_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1348:16: warning: unused function 'stbi_loadf' [-Wunused-function]
STBIDEF float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1436:16: warning: unused function 'stbi_hdr_to_ldr_gamma' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1/gamma; }
               ^
../inst/include/stb/stb_image.h:1437:16: warning: unused function 'stbi_hdr_to_ldr_scale' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1/scale; }
               ^
../inst/include/stb/stb_image.h:1430:16: warning: unused function 'stbi_ldr_to_hdr_gamma' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; }
               ^
../inst/include/stb/stb_image.h:1431:16: warning: unused function 'stbi_ldr_to_hdr_scale' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; }
               ^
../inst/include/stb/stb_image.h:1414:18: warning: unused function 'stbi_is_hdr_from_callbacks' [-Wunused-function]
STBIDEF int      stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user)
                 ^
../inst/include/stb/stb_image.h:1372:13: warning: unused function 'stbi_is_hdr_from_memory' [-Wunused-function]
STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:1386:18: warning: unused function 'stbi_is_hdr' [-Wunused-function]
STBIDEF int      stbi_is_hdr          (char const *filename)
                 ^
../inst/include/stb/stb_image.h:7293:13: warning: unused function 'stbi_info_from_memory' [-Wunused-function]
STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7300:13: warning: unused function 'stbi_info_from_callbacks' [-Wunused-function]
STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7307:13: warning: unused function 'stbi_is_16_bit_from_memory' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:7314:13: warning: unused function 'stbi_is_16_bit_from_callbacks' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *c, void *user)
            ^
../inst/include/stb/stb_image.h:7250:13: warning: unused function 'stbi_info' [-Wunused-function]
STBIDEF int stbi_info(char const *filename, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7271:13: warning: unused function 'stbi_is_16_bit' [-Wunused-function]
STBIDEF int stbi_is_16_bit(char const *filename)
            ^
../inst/include/stb/stb_image.h:4742:14: warning: unused function 'stbi_set_unpremultiply_on_load' [-Wunused-function]
STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply)
             ^
../inst/include/stb/stb_image.h:4747:14: warning: unused function 'stbi_convert_iphone_png_to_rgb' [-Wunused-function]
STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert)
             ^
../inst/include/stb/stb_image.h:999:14: warning: unused function 'stbi_set_flip_vertically_on_load' [-Wunused-function]
STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip)
             ^
../inst/include/stb/stb_image.h:4260:15: warning: unused function 'stbi_zlib_decode_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4281:13: warning: unused function 'stbi_zlib_decode_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, char const *ibuffer, int ilen)
            ^
../inst/include/stb/stb_image.h:4292:15: warning: unused function 'stbi_zlib_decode_noheader_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_noheader_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4308:13: warning: unused function 'stbi_zlib_decode_noheader_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen)
            ^
In file included from lsh.cpp:9:
In file included from ../inst/include/mlpack/methods/lsh/lsh_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:32:
In file included from ../inst/include/mlpack/core/data/save.hpp:24:
In file included from ../inst/include/mlpack/core/data/save_image.hpp:26:
../inst/include/stb/stb_image_write.h:1182:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/stb/stb_image_write.h:482:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:580:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:754:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/stb/stb_image_write.h:1514:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/stb/stb_image_write.h:266:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
35 warnings generated.
clang++ -arch arm64 -std=gnu++17 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppEnsmallen/include' -I/opt/R/arm64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2  -c mean_shift.cpp -o mean_shift.o
In file included from mean_shift.cpp:9:
In file included from ../inst/include/mlpack/methods/mean_shift/mean_shift_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:31:
In file included from ../inst/include/mlpack/core/data/load.hpp:26:
In file included from ../inst/include/mlpack/core/data/load_image.hpp:29:
../inst/include/stb/stb_image.h:1284:18: warning: unused function 'stbi_load_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1291:18: warning: unused function 'stbi_load_from_callbacks' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1299:18: warning: unused function 'stbi_load_gif_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1270:18: warning: unused function 'stbi_load_16_from_memory' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1277:18: warning: unused function 'stbi_load_16_from_callbacks' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1257:18: warning: unused function 'stbi_load_16' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16(char const *filename, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1333:16: warning: unused function 'stbi_loadf_from_memory' [-Wunused-function]
STBIDEF float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1340:16: warning: unused function 'stbi_loadf_from_callbacks' [-Wunused-function]
STBIDEF float *stbi_loadf_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1348:16: warning: unused function 'stbi_loadf' [-Wunused-function]
STBIDEF float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1436:16: warning: unused function 'stbi_hdr_to_ldr_gamma' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1/gamma; }
               ^
../inst/include/stb/stb_image.h:1437:16: warning: unused function 'stbi_hdr_to_ldr_scale' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1/scale; }
               ^
../inst/include/stb/stb_image.h:1430:16: warning: unused function 'stbi_ldr_to_hdr_gamma' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; }
               ^
../inst/include/stb/stb_image.h:1431:16: warning: unused function 'stbi_ldr_to_hdr_scale' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; }
               ^
../inst/include/stb/stb_image.h:1414:18: warning: unused function 'stbi_is_hdr_from_callbacks' [-Wunused-function]
STBIDEF int      stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user)
                 ^
../inst/include/stb/stb_image.h:1372:13: warning: unused function 'stbi_is_hdr_from_memory' [-Wunused-function]
STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:1386:18: warning: unused function 'stbi_is_hdr' [-Wunused-function]
STBIDEF int      stbi_is_hdr          (char const *filename)
                 ^
../inst/include/stb/stb_image.h:7293:13: warning: unused function 'stbi_info_from_memory' [-Wunused-function]
STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7300:13: warning: unused function 'stbi_info_from_callbacks' [-Wunused-function]
STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7307:13: warning: unused function 'stbi_is_16_bit_from_memory' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:7314:13: warning: unused function 'stbi_is_16_bit_from_callbacks' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *c, void *user)
            ^
../inst/include/stb/stb_image.h:7250:13: warning: unused function 'stbi_info' [-Wunused-function]
STBIDEF int stbi_info(char const *filename, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7271:13: warning: unused function 'stbi_is_16_bit' [-Wunused-function]
STBIDEF int stbi_is_16_bit(char const *filename)
            ^
../inst/include/stb/stb_image.h:4742:14: warning: unused function 'stbi_set_unpremultiply_on_load' [-Wunused-function]
STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply)
             ^
../inst/include/stb/stb_image.h:4747:14: warning: unused function 'stbi_convert_iphone_png_to_rgb' [-Wunused-function]
STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert)
             ^
../inst/include/stb/stb_image.h:999:14: warning: unused function 'stbi_set_flip_vertically_on_load' [-Wunused-function]
STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip)
             ^
../inst/include/stb/stb_image.h:4260:15: warning: unused function 'stbi_zlib_decode_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4281:13: warning: unused function 'stbi_zlib_decode_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, char const *ibuffer, int ilen)
            ^
../inst/include/stb/stb_image.h:4292:15: warning: unused function 'stbi_zlib_decode_noheader_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_noheader_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4308:13: warning: unused function 'stbi_zlib_decode_noheader_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen)
            ^
In file included from mean_shift.cpp:9:
In file included from ../inst/include/mlpack/methods/mean_shift/mean_shift_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:32:
In file included from ../inst/include/mlpack/core/data/save.hpp:24:
In file included from ../inst/include/mlpack/core/data/save_image.hpp:26:
../inst/include/stb/stb_image_write.h:1182:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/stb/stb_image_write.h:482:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:580:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:754:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/stb/stb_image_write.h:1514:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/stb/stb_image_write.h:266:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
35 warnings generated.
clang++ -arch arm64 -std=gnu++17 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppEnsmallen/include' -I/opt/R/arm64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2  -c nbc.cpp -o nbc.o
In file included from nbc.cpp:9:
In file included from ../inst/include/mlpack/methods/naive_bayes/nbc_main.cpp:15:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:31:
In file included from ../inst/include/mlpack/core/data/load.hpp:26:
In file included from ../inst/include/mlpack/core/data/load_image.hpp:29:
../inst/include/stb/stb_image.h:1284:18: warning: unused function 'stbi_load_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1291:18: warning: unused function 'stbi_load_from_callbacks' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1299:18: warning: unused function 'stbi_load_gif_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1270:18: warning: unused function 'stbi_load_16_from_memory' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1277:18: warning: unused function 'stbi_load_16_from_callbacks' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1257:18: warning: unused function 'stbi_load_16' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16(char const *filename, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1333:16: warning: unused function 'stbi_loadf_from_memory' [-Wunused-function]
STBIDEF float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1340:16: warning: unused function 'stbi_loadf_from_callbacks' [-Wunused-function]
STBIDEF float *stbi_loadf_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1348:16: warning: unused function 'stbi_loadf' [-Wunused-function]
STBIDEF float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1436:16: warning: unused function 'stbi_hdr_to_ldr_gamma' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1/gamma; }
               ^
../inst/include/stb/stb_image.h:1437:16: warning: unused function 'stbi_hdr_to_ldr_scale' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1/scale; }
               ^
../inst/include/stb/stb_image.h:1430:16: warning: unused function 'stbi_ldr_to_hdr_gamma' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; }
               ^
../inst/include/stb/stb_image.h:1431:16: warning: unused function 'stbi_ldr_to_hdr_scale' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; }
               ^
../inst/include/stb/stb_image.h:1414:18: warning: unused function 'stbi_is_hdr_from_callbacks' [-Wunused-function]
STBIDEF int      stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user)
                 ^
../inst/include/stb/stb_image.h:1372:13: warning: unused function 'stbi_is_hdr_from_memory' [-Wunused-function]
STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:1386:18: warning: unused function 'stbi_is_hdr' [-Wunused-function]
STBIDEF int      stbi_is_hdr          (char const *filename)
                 ^
../inst/include/stb/stb_image.h:7293:13: warning: unused function 'stbi_info_from_memory' [-Wunused-function]
STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7300:13: warning: unused function 'stbi_info_from_callbacks' [-Wunused-function]
STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7307:13: warning: unused function 'stbi_is_16_bit_from_memory' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:7314:13: warning: unused function 'stbi_is_16_bit_from_callbacks' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *c, void *user)
            ^
../inst/include/stb/stb_image.h:7250:13: warning: unused function 'stbi_info' [-Wunused-function]
STBIDEF int stbi_info(char const *filename, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7271:13: warning: unused function 'stbi_is_16_bit' [-Wunused-function]
STBIDEF int stbi_is_16_bit(char const *filename)
            ^
../inst/include/stb/stb_image.h:4742:14: warning: unused function 'stbi_set_unpremultiply_on_load' [-Wunused-function]
STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply)
             ^
../inst/include/stb/stb_image.h:4747:14: warning: unused function 'stbi_convert_iphone_png_to_rgb' [-Wunused-function]
STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert)
             ^
../inst/include/stb/stb_image.h:999:14: warning: unused function 'stbi_set_flip_vertically_on_load' [-Wunused-function]
STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip)
             ^
../inst/include/stb/stb_image.h:4260:15: warning: unused function 'stbi_zlib_decode_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4281:13: warning: unused function 'stbi_zlib_decode_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, char const *ibuffer, int ilen)
            ^
../inst/include/stb/stb_image.h:4292:15: warning: unused function 'stbi_zlib_decode_noheader_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_noheader_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4308:13: warning: unused function 'stbi_zlib_decode_noheader_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen)
            ^
In file included from nbc.cpp:9:
In file included from ../inst/include/mlpack/methods/naive_bayes/nbc_main.cpp:15:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:32:
In file included from ../inst/include/mlpack/core/data/save.hpp:24:
In file included from ../inst/include/mlpack/core/data/save_image.hpp:26:
../inst/include/stb/stb_image_write.h:1182:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/stb/stb_image_write.h:482:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:580:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:754:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/stb/stb_image_write.h:1514:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/stb/stb_image_write.h:266:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
35 warnings generated.
clang++ -arch arm64 -std=gnu++17 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppEnsmallen/include' -I/opt/R/arm64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2  -c nca.cpp -o nca.o
In file included from nca.cpp:9:
In file included from ../inst/include/mlpack/methods/nca/nca_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:31:
In file included from ../inst/include/mlpack/core/data/load.hpp:26:
In file included from ../inst/include/mlpack/core/data/load_image.hpp:29:
../inst/include/stb/stb_image.h:1284:18: warning: unused function 'stbi_load_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1291:18: warning: unused function 'stbi_load_from_callbacks' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1299:18: warning: unused function 'stbi_load_gif_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1270:18: warning: unused function 'stbi_load_16_from_memory' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1277:18: warning: unused function 'stbi_load_16_from_callbacks' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1257:18: warning: unused function 'stbi_load_16' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16(char const *filename, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1333:16: warning: unused function 'stbi_loadf_from_memory' [-Wunused-function]
STBIDEF float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1340:16: warning: unused function 'stbi_loadf_from_callbacks' [-Wunused-function]
STBIDEF float *stbi_loadf_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1348:16: warning: unused function 'stbi_loadf' [-Wunused-function]
STBIDEF float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1436:16: warning: unused function 'stbi_hdr_to_ldr_gamma' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1/gamma; }
               ^
../inst/include/stb/stb_image.h:1437:16: warning: unused function 'stbi_hdr_to_ldr_scale' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1/scale; }
               ^
../inst/include/stb/stb_image.h:1430:16: warning: unused function 'stbi_ldr_to_hdr_gamma' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; }
               ^
../inst/include/stb/stb_image.h:1431:16: warning: unused function 'stbi_ldr_to_hdr_scale' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; }
               ^
../inst/include/stb/stb_image.h:1414:18: warning: unused function 'stbi_is_hdr_from_callbacks' [-Wunused-function]
STBIDEF int      stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user)
                 ^
../inst/include/stb/stb_image.h:1372:13: warning: unused function 'stbi_is_hdr_from_memory' [-Wunused-function]
STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:1386:18: warning: unused function 'stbi_is_hdr' [-Wunused-function]
STBIDEF int      stbi_is_hdr          (char const *filename)
                 ^
../inst/include/stb/stb_image.h:7293:13: warning: unused function 'stbi_info_from_memory' [-Wunused-function]
STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7300:13: warning: unused function 'stbi_info_from_callbacks' [-Wunused-function]
STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7307:13: warning: unused function 'stbi_is_16_bit_from_memory' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:7314:13: warning: unused function 'stbi_is_16_bit_from_callbacks' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *c, void *user)
            ^
../inst/include/stb/stb_image.h:7250:13: warning: unused function 'stbi_info' [-Wunused-function]
STBIDEF int stbi_info(char const *filename, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7271:13: warning: unused function 'stbi_is_16_bit' [-Wunused-function]
STBIDEF int stbi_is_16_bit(char const *filename)
            ^
../inst/include/stb/stb_image.h:4742:14: warning: unused function 'stbi_set_unpremultiply_on_load' [-Wunused-function]
STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply)
             ^
../inst/include/stb/stb_image.h:4747:14: warning: unused function 'stbi_convert_iphone_png_to_rgb' [-Wunused-function]
STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert)
             ^
../inst/include/stb/stb_image.h:999:14: warning: unused function 'stbi_set_flip_vertically_on_load' [-Wunused-function]
STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip)
             ^
../inst/include/stb/stb_image.h:4260:15: warning: unused function 'stbi_zlib_decode_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4281:13: warning: unused function 'stbi_zlib_decode_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, char const *ibuffer, int ilen)
            ^
../inst/include/stb/stb_image.h:4292:15: warning: unused function 'stbi_zlib_decode_noheader_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_noheader_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4308:13: warning: unused function 'stbi_zlib_decode_noheader_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen)
            ^
In file included from nca.cpp:9:
In file included from ../inst/include/mlpack/methods/nca/nca_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:32:
In file included from ../inst/include/mlpack/core/data/save.hpp:24:
In file included from ../inst/include/mlpack/core/data/save_image.hpp:26:
../inst/include/stb/stb_image_write.h:1182:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/stb/stb_image_write.h:482:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:580:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:754:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/stb/stb_image_write.h:1514:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/stb/stb_image_write.h:266:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
35 warnings generated.
clang++ -arch arm64 -std=gnu++17 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppEnsmallen/include' -I/opt/R/arm64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2  -c nmf.cpp -o nmf.o
In file included from nmf.cpp:9:
In file included from ../inst/include/mlpack/methods/nmf/nmf_main.cpp:19:
In file included from ../inst/include/mlpack/methods/amf/amf.hpp:23:
In file included from ../inst/include/mlpack/methods/amf/update_rules/update_rules.hpp:18:
../inst/include/mlpack/methods/amf/update_rules/svd_batch_learning.hpp:210:16: warning: unused variable 'm' [-Wunused-variable]
  const size_t m = (size_t) V.n_cols;
               ^
../inst/include/mlpack/methods/amf/update_rules/svd_batch_learning.hpp:264:16: warning: unused variable 'n' [-Wunused-variable]
  const size_t n = (size_t) V.n_rows;
               ^
In file included from nmf.cpp:9:
In file included from ../inst/include/mlpack/methods/nmf/nmf_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:31:
In file included from ../inst/include/mlpack/core/data/load.hpp:26:
In file included from ../inst/include/mlpack/core/data/load_image.hpp:29:
../inst/include/stb/stb_image.h:1284:18: warning: unused function 'stbi_load_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1291:18: warning: unused function 'stbi_load_from_callbacks' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1299:18: warning: unused function 'stbi_load_gif_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1270:18: warning: unused function 'stbi_load_16_from_memory' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1277:18: warning: unused function 'stbi_load_16_from_callbacks' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1257:18: warning: unused function 'stbi_load_16' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16(char const *filename, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1333:16: warning: unused function 'stbi_loadf_from_memory' [-Wunused-function]
STBIDEF float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1340:16: warning: unused function 'stbi_loadf_from_callbacks' [-Wunused-function]
STBIDEF float *stbi_loadf_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1348:16: warning: unused function 'stbi_loadf' [-Wunused-function]
STBIDEF float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1436:16: warning: unused function 'stbi_hdr_to_ldr_gamma' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1/gamma; }
               ^
../inst/include/stb/stb_image.h:1437:16: warning: unused function 'stbi_hdr_to_ldr_scale' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1/scale; }
               ^
../inst/include/stb/stb_image.h:1430:16: warning: unused function 'stbi_ldr_to_hdr_gamma' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; }
               ^
../inst/include/stb/stb_image.h:1431:16: warning: unused function 'stbi_ldr_to_hdr_scale' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; }
               ^
../inst/include/stb/stb_image.h:1414:18: warning: unused function 'stbi_is_hdr_from_callbacks' [-Wunused-function]
STBIDEF int      stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user)
                 ^
../inst/include/stb/stb_image.h:1372:13: warning: unused function 'stbi_is_hdr_from_memory' [-Wunused-function]
STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:1386:18: warning: unused function 'stbi_is_hdr' [-Wunused-function]
STBIDEF int      stbi_is_hdr          (char const *filename)
                 ^
../inst/include/stb/stb_image.h:7293:13: warning: unused function 'stbi_info_from_memory' [-Wunused-function]
STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7300:13: warning: unused function 'stbi_info_from_callbacks' [-Wunused-function]
STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7307:13: warning: unused function 'stbi_is_16_bit_from_memory' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:7314:13: warning: unused function 'stbi_is_16_bit_from_callbacks' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *c, void *user)
            ^
../inst/include/stb/stb_image.h:7250:13: warning: unused function 'stbi_info' [-Wunused-function]
STBIDEF int stbi_info(char const *filename, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7271:13: warning: unused function 'stbi_is_16_bit' [-Wunused-function]
STBIDEF int stbi_is_16_bit(char const *filename)
            ^
../inst/include/stb/stb_image.h:4742:14: warning: unused function 'stbi_set_unpremultiply_on_load' [-Wunused-function]
STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply)
             ^
../inst/include/stb/stb_image.h:4747:14: warning: unused function 'stbi_convert_iphone_png_to_rgb' [-Wunused-function]
STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert)
             ^
../inst/include/stb/stb_image.h:999:14: warning: unused function 'stbi_set_flip_vertically_on_load' [-Wunused-function]
STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip)
             ^
../inst/include/stb/stb_image.h:4260:15: warning: unused function 'stbi_zlib_decode_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4281:13: warning: unused function 'stbi_zlib_decode_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, char const *ibuffer, int ilen)
            ^
../inst/include/stb/stb_image.h:4292:15: warning: unused function 'stbi_zlib_decode_noheader_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_noheader_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4308:13: warning: unused function 'stbi_zlib_decode_noheader_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen)
            ^
In file included from nmf.cpp:9:
In file included from ../inst/include/mlpack/methods/nmf/nmf_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:32:
In file included from ../inst/include/mlpack/core/data/save.hpp:24:
In file included from ../inst/include/mlpack/core/data/save_image.hpp:26:
../inst/include/stb/stb_image_write.h:1182:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/stb/stb_image_write.h:482:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:580:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:754:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/stb/stb_image_write.h:1514:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/stb/stb_image_write.h:266:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
37 warnings generated.
clang++ -arch arm64 -std=gnu++17 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppEnsmallen/include' -I/opt/R/arm64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2  -c pca.cpp -o pca.o
In file included from pca.cpp:9:
In file included from ../inst/include/mlpack/methods/pca/pca_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:31:
In file included from ../inst/include/mlpack/core/data/load.hpp:26:
In file included from ../inst/include/mlpack/core/data/load_image.hpp:29:
../inst/include/stb/stb_image.h:1284:18: warning: unused function 'stbi_load_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1291:18: warning: unused function 'stbi_load_from_callbacks' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1299:18: warning: unused function 'stbi_load_gif_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1270:18: warning: unused function 'stbi_load_16_from_memory' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1277:18: warning: unused function 'stbi_load_16_from_callbacks' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1257:18: warning: unused function 'stbi_load_16' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16(char const *filename, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1333:16: warning: unused function 'stbi_loadf_from_memory' [-Wunused-function]
STBIDEF float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1340:16: warning: unused function 'stbi_loadf_from_callbacks' [-Wunused-function]
STBIDEF float *stbi_loadf_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1348:16: warning: unused function 'stbi_loadf' [-Wunused-function]
STBIDEF float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1436:16: warning: unused function 'stbi_hdr_to_ldr_gamma' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1/gamma; }
               ^
../inst/include/stb/stb_image.h:1437:16: warning: unused function 'stbi_hdr_to_ldr_scale' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1/scale; }
               ^
../inst/include/stb/stb_image.h:1430:16: warning: unused function 'stbi_ldr_to_hdr_gamma' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; }
               ^
../inst/include/stb/stb_image.h:1431:16: warning: unused function 'stbi_ldr_to_hdr_scale' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; }
               ^
../inst/include/stb/stb_image.h:1414:18: warning: unused function 'stbi_is_hdr_from_callbacks' [-Wunused-function]
STBIDEF int      stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user)
                 ^
../inst/include/stb/stb_image.h:1372:13: warning: unused function 'stbi_is_hdr_from_memory' [-Wunused-function]
STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:1386:18: warning: unused function 'stbi_is_hdr' [-Wunused-function]
STBIDEF int      stbi_is_hdr          (char const *filename)
                 ^
../inst/include/stb/stb_image.h:7293:13: warning: unused function 'stbi_info_from_memory' [-Wunused-function]
STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7300:13: warning: unused function 'stbi_info_from_callbacks' [-Wunused-function]
STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7307:13: warning: unused function 'stbi_is_16_bit_from_memory' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:7314:13: warning: unused function 'stbi_is_16_bit_from_callbacks' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *c, void *user)
            ^
../inst/include/stb/stb_image.h:7250:13: warning: unused function 'stbi_info' [-Wunused-function]
STBIDEF int stbi_info(char const *filename, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7271:13: warning: unused function 'stbi_is_16_bit' [-Wunused-function]
STBIDEF int stbi_is_16_bit(char const *filename)
            ^
../inst/include/stb/stb_image.h:4742:14: warning: unused function 'stbi_set_unpremultiply_on_load' [-Wunused-function]
STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply)
             ^
../inst/include/stb/stb_image.h:4747:14: warning: unused function 'stbi_convert_iphone_png_to_rgb' [-Wunused-function]
STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert)
             ^
../inst/include/stb/stb_image.h:999:14: warning: unused function 'stbi_set_flip_vertically_on_load' [-Wunused-function]
STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip)
             ^
../inst/include/stb/stb_image.h:4260:15: warning: unused function 'stbi_zlib_decode_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4281:13: warning: unused function 'stbi_zlib_decode_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, char const *ibuffer, int ilen)
            ^
../inst/include/stb/stb_image.h:4292:15: warning: unused function 'stbi_zlib_decode_noheader_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_noheader_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4308:13: warning: unused function 'stbi_zlib_decode_noheader_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen)
            ^
In file included from pca.cpp:9:
In file included from ../inst/include/mlpack/methods/pca/pca_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:32:
In file included from ../inst/include/mlpack/core/data/save.hpp:24:
In file included from ../inst/include/mlpack/core/data/save_image.hpp:26:
../inst/include/stb/stb_image_write.h:1182:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/stb/stb_image_write.h:482:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:580:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:754:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/stb/stb_image_write.h:1514:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/stb/stb_image_write.h:266:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
35 warnings generated.
clang++ -arch arm64 -std=gnu++17 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppEnsmallen/include' -I/opt/R/arm64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2  -c perceptron.cpp -o perceptron.o
In file included from perceptron.cpp:9:
In file included from ../inst/include/mlpack/methods/perceptron/perceptron_main.cpp:15:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:31:
In file included from ../inst/include/mlpack/core/data/load.hpp:26:
In file included from ../inst/include/mlpack/core/data/load_image.hpp:29:
../inst/include/stb/stb_image.h:1284:18: warning: unused function 'stbi_load_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1291:18: warning: unused function 'stbi_load_from_callbacks' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1299:18: warning: unused function 'stbi_load_gif_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1270:18: warning: unused function 'stbi_load_16_from_memory' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1277:18: warning: unused function 'stbi_load_16_from_callbacks' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1257:18: warning: unused function 'stbi_load_16' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16(char const *filename, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1333:16: warning: unused function 'stbi_loadf_from_memory' [-Wunused-function]
STBIDEF float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1340:16: warning: unused function 'stbi_loadf_from_callbacks' [-Wunused-function]
STBIDEF float *stbi_loadf_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1348:16: warning: unused function 'stbi_loadf' [-Wunused-function]
STBIDEF float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1436:16: warning: unused function 'stbi_hdr_to_ldr_gamma' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1/gamma; }
               ^
../inst/include/stb/stb_image.h:1437:16: warning: unused function 'stbi_hdr_to_ldr_scale' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1/scale; }
               ^
../inst/include/stb/stb_image.h:1430:16: warning: unused function 'stbi_ldr_to_hdr_gamma' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; }
               ^
../inst/include/stb/stb_image.h:1431:16: warning: unused function 'stbi_ldr_to_hdr_scale' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; }
               ^
../inst/include/stb/stb_image.h:1414:18: warning: unused function 'stbi_is_hdr_from_callbacks' [-Wunused-function]
STBIDEF int      stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user)
                 ^
../inst/include/stb/stb_image.h:1372:13: warning: unused function 'stbi_is_hdr_from_memory' [-Wunused-function]
STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:1386:18: warning: unused function 'stbi_is_hdr' [-Wunused-function]
STBIDEF int      stbi_is_hdr          (char const *filename)
                 ^
../inst/include/stb/stb_image.h:7293:13: warning: unused function 'stbi_info_from_memory' [-Wunused-function]
STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7300:13: warning: unused function 'stbi_info_from_callbacks' [-Wunused-function]
STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7307:13: warning: unused function 'stbi_is_16_bit_from_memory' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:7314:13: warning: unused function 'stbi_is_16_bit_from_callbacks' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *c, void *user)
            ^
../inst/include/stb/stb_image.h:7250:13: warning: unused function 'stbi_info' [-Wunused-function]
STBIDEF int stbi_info(char const *filename, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7271:13: warning: unused function 'stbi_is_16_bit' [-Wunused-function]
STBIDEF int stbi_is_16_bit(char const *filename)
            ^
../inst/include/stb/stb_image.h:4742:14: warning: unused function 'stbi_set_unpremultiply_on_load' [-Wunused-function]
STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply)
             ^
../inst/include/stb/stb_image.h:4747:14: warning: unused function 'stbi_convert_iphone_png_to_rgb' [-Wunused-function]
STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert)
             ^
../inst/include/stb/stb_image.h:999:14: warning: unused function 'stbi_set_flip_vertically_on_load' [-Wunused-function]
STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip)
             ^
../inst/include/stb/stb_image.h:4260:15: warning: unused function 'stbi_zlib_decode_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4281:13: warning: unused function 'stbi_zlib_decode_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, char const *ibuffer, int ilen)
            ^
../inst/include/stb/stb_image.h:4292:15: warning: unused function 'stbi_zlib_decode_noheader_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_noheader_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4308:13: warning: unused function 'stbi_zlib_decode_noheader_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen)
            ^
In file included from perceptron.cpp:9:
In file included from ../inst/include/mlpack/methods/perceptron/perceptron_main.cpp:15:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:32:
In file included from ../inst/include/mlpack/core/data/save.hpp:24:
In file included from ../inst/include/mlpack/core/data/save_image.hpp:26:
../inst/include/stb/stb_image_write.h:1182:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/stb/stb_image_write.h:482:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:580:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:754:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/stb/stb_image_write.h:1514:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/stb/stb_image_write.h:266:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
35 warnings generated.
clang++ -arch arm64 -std=gnu++17 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppEnsmallen/include' -I/opt/R/arm64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2  -c preprocess_binarize.cpp -o preprocess_binarize.o
In file included from preprocess_binarize.cpp:9:
In file included from ../inst/include/mlpack/methods/preprocess/preprocess_binarize_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:31:
In file included from ../inst/include/mlpack/core/data/load.hpp:26:
In file included from ../inst/include/mlpack/core/data/load_image.hpp:29:
../inst/include/stb/stb_image.h:1284:18: warning: unused function 'stbi_load_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1291:18: warning: unused function 'stbi_load_from_callbacks' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1299:18: warning: unused function 'stbi_load_gif_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1270:18: warning: unused function 'stbi_load_16_from_memory' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1277:18: warning: unused function 'stbi_load_16_from_callbacks' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1257:18: warning: unused function 'stbi_load_16' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16(char const *filename, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1333:16: warning: unused function 'stbi_loadf_from_memory' [-Wunused-function]
STBIDEF float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1340:16: warning: unused function 'stbi_loadf_from_callbacks' [-Wunused-function]
STBIDEF float *stbi_loadf_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1348:16: warning: unused function 'stbi_loadf' [-Wunused-function]
STBIDEF float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1436:16: warning: unused function 'stbi_hdr_to_ldr_gamma' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1/gamma; }
               ^
../inst/include/stb/stb_image.h:1437:16: warning: unused function 'stbi_hdr_to_ldr_scale' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1/scale; }
               ^
../inst/include/stb/stb_image.h:1430:16: warning: unused function 'stbi_ldr_to_hdr_gamma' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; }
               ^
../inst/include/stb/stb_image.h:1431:16: warning: unused function 'stbi_ldr_to_hdr_scale' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; }
               ^
../inst/include/stb/stb_image.h:1414:18: warning: unused function 'stbi_is_hdr_from_callbacks' [-Wunused-function]
STBIDEF int      stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user)
                 ^
../inst/include/stb/stb_image.h:1372:13: warning: unused function 'stbi_is_hdr_from_memory' [-Wunused-function]
STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:1386:18: warning: unused function 'stbi_is_hdr' [-Wunused-function]
STBIDEF int      stbi_is_hdr          (char const *filename)
                 ^
../inst/include/stb/stb_image.h:7293:13: warning: unused function 'stbi_info_from_memory' [-Wunused-function]
STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7300:13: warning: unused function 'stbi_info_from_callbacks' [-Wunused-function]
STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7307:13: warning: unused function 'stbi_is_16_bit_from_memory' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:7314:13: warning: unused function 'stbi_is_16_bit_from_callbacks' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *c, void *user)
            ^
../inst/include/stb/stb_image.h:7250:13: warning: unused function 'stbi_info' [-Wunused-function]
STBIDEF int stbi_info(char const *filename, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7271:13: warning: unused function 'stbi_is_16_bit' [-Wunused-function]
STBIDEF int stbi_is_16_bit(char const *filename)
            ^
../inst/include/stb/stb_image.h:4742:14: warning: unused function 'stbi_set_unpremultiply_on_load' [-Wunused-function]
STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply)
             ^
../inst/include/stb/stb_image.h:4747:14: warning: unused function 'stbi_convert_iphone_png_to_rgb' [-Wunused-function]
STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert)
             ^
../inst/include/stb/stb_image.h:999:14: warning: unused function 'stbi_set_flip_vertically_on_load' [-Wunused-function]
STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip)
             ^
../inst/include/stb/stb_image.h:4260:15: warning: unused function 'stbi_zlib_decode_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4281:13: warning: unused function 'stbi_zlib_decode_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, char const *ibuffer, int ilen)
            ^
../inst/include/stb/stb_image.h:4292:15: warning: unused function 'stbi_zlib_decode_noheader_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_noheader_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4308:13: warning: unused function 'stbi_zlib_decode_noheader_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen)
            ^
In file included from preprocess_binarize.cpp:9:
In file included from ../inst/include/mlpack/methods/preprocess/preprocess_binarize_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:32:
In file included from ../inst/include/mlpack/core/data/save.hpp:24:
In file included from ../inst/include/mlpack/core/data/save_image.hpp:26:
../inst/include/stb/stb_image_write.h:1182:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/stb/stb_image_write.h:482:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:580:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:754:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/stb/stb_image_write.h:1514:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/stb/stb_image_write.h:266:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
35 warnings generated.
clang++ -arch arm64 -std=gnu++17 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppEnsmallen/include' -I/opt/R/arm64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2  -c preprocess_describe.cpp -o preprocess_describe.o
In file included from preprocess_describe.cpp:9:
In file included from ../inst/include/mlpack/methods/preprocess/preprocess_describe_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:31:
In file included from ../inst/include/mlpack/core/data/load.hpp:26:
In file included from ../inst/include/mlpack/core/data/load_image.hpp:29:
../inst/include/stb/stb_image.h:1284:18: warning: unused function 'stbi_load_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1291:18: warning: unused function 'stbi_load_from_callbacks' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1299:18: warning: unused function 'stbi_load_gif_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1270:18: warning: unused function 'stbi_load_16_from_memory' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1277:18: warning: unused function 'stbi_load_16_from_callbacks' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1257:18: warning: unused function 'stbi_load_16' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16(char const *filename, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1333:16: warning: unused function 'stbi_loadf_from_memory' [-Wunused-function]
STBIDEF float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1340:16: warning: unused function 'stbi_loadf_from_callbacks' [-Wunused-function]
STBIDEF float *stbi_loadf_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1348:16: warning: unused function 'stbi_loadf' [-Wunused-function]
STBIDEF float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1436:16: warning: unused function 'stbi_hdr_to_ldr_gamma' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1/gamma; }
               ^
../inst/include/stb/stb_image.h:1437:16: warning: unused function 'stbi_hdr_to_ldr_scale' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1/scale; }
               ^
../inst/include/stb/stb_image.h:1430:16: warning: unused function 'stbi_ldr_to_hdr_gamma' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; }
               ^
../inst/include/stb/stb_image.h:1431:16: warning: unused function 'stbi_ldr_to_hdr_scale' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; }
               ^
../inst/include/stb/stb_image.h:1414:18: warning: unused function 'stbi_is_hdr_from_callbacks' [-Wunused-function]
STBIDEF int      stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user)
                 ^
../inst/include/stb/stb_image.h:1372:13: warning: unused function 'stbi_is_hdr_from_memory' [-Wunused-function]
STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:1386:18: warning: unused function 'stbi_is_hdr' [-Wunused-function]
STBIDEF int      stbi_is_hdr          (char const *filename)
                 ^
../inst/include/stb/stb_image.h:7293:13: warning: unused function 'stbi_info_from_memory' [-Wunused-function]
STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7300:13: warning: unused function 'stbi_info_from_callbacks' [-Wunused-function]
STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7307:13: warning: unused function 'stbi_is_16_bit_from_memory' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:7314:13: warning: unused function 'stbi_is_16_bit_from_callbacks' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *c, void *user)
            ^
../inst/include/stb/stb_image.h:7250:13: warning: unused function 'stbi_info' [-Wunused-function]
STBIDEF int stbi_info(char const *filename, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7271:13: warning: unused function 'stbi_is_16_bit' [-Wunused-function]
STBIDEF int stbi_is_16_bit(char const *filename)
            ^
../inst/include/stb/stb_image.h:4742:14: warning: unused function 'stbi_set_unpremultiply_on_load' [-Wunused-function]
STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply)
             ^
../inst/include/stb/stb_image.h:4747:14: warning: unused function 'stbi_convert_iphone_png_to_rgb' [-Wunused-function]
STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert)
             ^
../inst/include/stb/stb_image.h:999:14: warning: unused function 'stbi_set_flip_vertically_on_load' [-Wunused-function]
STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip)
             ^
../inst/include/stb/stb_image.h:4260:15: warning: unused function 'stbi_zlib_decode_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4281:13: warning: unused function 'stbi_zlib_decode_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, char const *ibuffer, int ilen)
            ^
../inst/include/stb/stb_image.h:4292:15: warning: unused function 'stbi_zlib_decode_noheader_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_noheader_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4308:13: warning: unused function 'stbi_zlib_decode_noheader_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen)
            ^
In file included from preprocess_describe.cpp:9:
In file included from ../inst/include/mlpack/methods/preprocess/preprocess_describe_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:32:
In file included from ../inst/include/mlpack/core/data/save.hpp:24:
In file included from ../inst/include/mlpack/core/data/save_image.hpp:26:
../inst/include/stb/stb_image_write.h:1182:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/stb/stb_image_write.h:482:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:580:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:754:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/stb/stb_image_write.h:1514:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/stb/stb_image_write.h:266:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
35 warnings generated.
clang++ -arch arm64 -std=gnu++17 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppEnsmallen/include' -I/opt/R/arm64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2  -c preprocess_one_hot_encoding.cpp -o preprocess_one_hot_encoding.o
In file included from preprocess_one_hot_encoding.cpp:9:
In file included from ../inst/include/mlpack/methods/preprocess/preprocess_one_hot_encoding_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:31:
In file included from ../inst/include/mlpack/core/data/load.hpp:26:
In file included from ../inst/include/mlpack/core/data/load_image.hpp:29:
../inst/include/stb/stb_image.h:1284:18: warning: unused function 'stbi_load_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1291:18: warning: unused function 'stbi_load_from_callbacks' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1299:18: warning: unused function 'stbi_load_gif_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1270:18: warning: unused function 'stbi_load_16_from_memory' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1277:18: warning: unused function 'stbi_load_16_from_callbacks' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1257:18: warning: unused function 'stbi_load_16' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16(char const *filename, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1333:16: warning: unused function 'stbi_loadf_from_memory' [-Wunused-function]
STBIDEF float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1340:16: warning: unused function 'stbi_loadf_from_callbacks' [-Wunused-function]
STBIDEF float *stbi_loadf_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1348:16: warning: unused function 'stbi_loadf' [-Wunused-function]
STBIDEF float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1436:16: warning: unused function 'stbi_hdr_to_ldr_gamma' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1/gamma; }
               ^
../inst/include/stb/stb_image.h:1437:16: warning: unused function 'stbi_hdr_to_ldr_scale' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1/scale; }
               ^
../inst/include/stb/stb_image.h:1430:16: warning: unused function 'stbi_ldr_to_hdr_gamma' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; }
               ^
../inst/include/stb/stb_image.h:1431:16: warning: unused function 'stbi_ldr_to_hdr_scale' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; }
               ^
../inst/include/stb/stb_image.h:1414:18: warning: unused function 'stbi_is_hdr_from_callbacks' [-Wunused-function]
STBIDEF int      stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user)
                 ^
../inst/include/stb/stb_image.h:1372:13: warning: unused function 'stbi_is_hdr_from_memory' [-Wunused-function]
STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:1386:18: warning: unused function 'stbi_is_hdr' [-Wunused-function]
STBIDEF int      stbi_is_hdr          (char const *filename)
                 ^
../inst/include/stb/stb_image.h:7293:13: warning: unused function 'stbi_info_from_memory' [-Wunused-function]
STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7300:13: warning: unused function 'stbi_info_from_callbacks' [-Wunused-function]
STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7307:13: warning: unused function 'stbi_is_16_bit_from_memory' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:7314:13: warning: unused function 'stbi_is_16_bit_from_callbacks' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *c, void *user)
            ^
../inst/include/stb/stb_image.h:7250:13: warning: unused function 'stbi_info' [-Wunused-function]
STBIDEF int stbi_info(char const *filename, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7271:13: warning: unused function 'stbi_is_16_bit' [-Wunused-function]
STBIDEF int stbi_is_16_bit(char const *filename)
            ^
../inst/include/stb/stb_image.h:4742:14: warning: unused function 'stbi_set_unpremultiply_on_load' [-Wunused-function]
STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply)
             ^
../inst/include/stb/stb_image.h:4747:14: warning: unused function 'stbi_convert_iphone_png_to_rgb' [-Wunused-function]
STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert)
             ^
../inst/include/stb/stb_image.h:999:14: warning: unused function 'stbi_set_flip_vertically_on_load' [-Wunused-function]
STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip)
             ^
../inst/include/stb/stb_image.h:4260:15: warning: unused function 'stbi_zlib_decode_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4281:13: warning: unused function 'stbi_zlib_decode_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, char const *ibuffer, int ilen)
            ^
../inst/include/stb/stb_image.h:4292:15: warning: unused function 'stbi_zlib_decode_noheader_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_noheader_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4308:13: warning: unused function 'stbi_zlib_decode_noheader_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen)
            ^
In file included from preprocess_one_hot_encoding.cpp:9:
In file included from ../inst/include/mlpack/methods/preprocess/preprocess_one_hot_encoding_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:32:
In file included from ../inst/include/mlpack/core/data/save.hpp:24:
In file included from ../inst/include/mlpack/core/data/save_image.hpp:26:
../inst/include/stb/stb_image_write.h:1182:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/stb/stb_image_write.h:482:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:580:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:754:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/stb/stb_image_write.h:1514:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/stb/stb_image_write.h:266:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
35 warnings generated.
clang++ -arch arm64 -std=gnu++17 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppEnsmallen/include' -I/opt/R/arm64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2  -c preprocess_scale.cpp -o preprocess_scale.o
In file included from preprocess_scale.cpp:9:
In file included from ../inst/include/mlpack/methods/preprocess/preprocess_scale_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:31:
In file included from ../inst/include/mlpack/core/data/load.hpp:26:
In file included from ../inst/include/mlpack/core/data/load_image.hpp:29:
../inst/include/stb/stb_image.h:1284:18: warning: unused function 'stbi_load_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1291:18: warning: unused function 'stbi_load_from_callbacks' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1299:18: warning: unused function 'stbi_load_gif_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1270:18: warning: unused function 'stbi_load_16_from_memory' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1277:18: warning: unused function 'stbi_load_16_from_callbacks' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1257:18: warning: unused function 'stbi_load_16' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16(char const *filename, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1333:16: warning: unused function 'stbi_loadf_from_memory' [-Wunused-function]
STBIDEF float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1340:16: warning: unused function 'stbi_loadf_from_callbacks' [-Wunused-function]
STBIDEF float *stbi_loadf_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1348:16: warning: unused function 'stbi_loadf' [-Wunused-function]
STBIDEF float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1436:16: warning: unused function 'stbi_hdr_to_ldr_gamma' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1/gamma; }
               ^
../inst/include/stb/stb_image.h:1437:16: warning: unused function 'stbi_hdr_to_ldr_scale' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1/scale; }
               ^
../inst/include/stb/stb_image.h:1430:16: warning: unused function 'stbi_ldr_to_hdr_gamma' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; }
               ^
../inst/include/stb/stb_image.h:1431:16: warning: unused function 'stbi_ldr_to_hdr_scale' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; }
               ^
../inst/include/stb/stb_image.h:1414:18: warning: unused function 'stbi_is_hdr_from_callbacks' [-Wunused-function]
STBIDEF int      stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user)
                 ^
../inst/include/stb/stb_image.h:1372:13: warning: unused function 'stbi_is_hdr_from_memory' [-Wunused-function]
STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:1386:18: warning: unused function 'stbi_is_hdr' [-Wunused-function]
STBIDEF int      stbi_is_hdr          (char const *filename)
                 ^
../inst/include/stb/stb_image.h:7293:13: warning: unused function 'stbi_info_from_memory' [-Wunused-function]
STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7300:13: warning: unused function 'stbi_info_from_callbacks' [-Wunused-function]
STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7307:13: warning: unused function 'stbi_is_16_bit_from_memory' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:7314:13: warning: unused function 'stbi_is_16_bit_from_callbacks' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *c, void *user)
            ^
../inst/include/stb/stb_image.h:7250:13: warning: unused function 'stbi_info' [-Wunused-function]
STBIDEF int stbi_info(char const *filename, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7271:13: warning: unused function 'stbi_is_16_bit' [-Wunused-function]
STBIDEF int stbi_is_16_bit(char const *filename)
            ^
../inst/include/stb/stb_image.h:4742:14: warning: unused function 'stbi_set_unpremultiply_on_load' [-Wunused-function]
STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply)
             ^
../inst/include/stb/stb_image.h:4747:14: warning: unused function 'stbi_convert_iphone_png_to_rgb' [-Wunused-function]
STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert)
             ^
../inst/include/stb/stb_image.h:999:14: warning: unused function 'stbi_set_flip_vertically_on_load' [-Wunused-function]
STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip)
             ^
../inst/include/stb/stb_image.h:4260:15: warning: unused function 'stbi_zlib_decode_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4281:13: warning: unused function 'stbi_zlib_decode_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, char const *ibuffer, int ilen)
            ^
../inst/include/stb/stb_image.h:4292:15: warning: unused function 'stbi_zlib_decode_noheader_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_noheader_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4308:13: warning: unused function 'stbi_zlib_decode_noheader_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen)
            ^
In file included from preprocess_scale.cpp:9:
In file included from ../inst/include/mlpack/methods/preprocess/preprocess_scale_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:32:
In file included from ../inst/include/mlpack/core/data/save.hpp:24:
In file included from ../inst/include/mlpack/core/data/save_image.hpp:26:
../inst/include/stb/stb_image_write.h:1182:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/stb/stb_image_write.h:482:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:580:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:754:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/stb/stb_image_write.h:1514:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/stb/stb_image_write.h:266:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
35 warnings generated.
clang++ -arch arm64 -std=gnu++17 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppEnsmallen/include' -I/opt/R/arm64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2  -c preprocess_split.cpp -o preprocess_split.o
In file included from preprocess_split.cpp:9:
In file included from ../inst/include/mlpack/methods/preprocess/preprocess_split_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:31:
In file included from ../inst/include/mlpack/core/data/load.hpp:26:
In file included from ../inst/include/mlpack/core/data/load_image.hpp:29:
../inst/include/stb/stb_image.h:1284:18: warning: unused function 'stbi_load_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1291:18: warning: unused function 'stbi_load_from_callbacks' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1299:18: warning: unused function 'stbi_load_gif_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1270:18: warning: unused function 'stbi_load_16_from_memory' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1277:18: warning: unused function 'stbi_load_16_from_callbacks' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1257:18: warning: unused function 'stbi_load_16' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16(char const *filename, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1333:16: warning: unused function 'stbi_loadf_from_memory' [-Wunused-function]
STBIDEF float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1340:16: warning: unused function 'stbi_loadf_from_callbacks' [-Wunused-function]
STBIDEF float *stbi_loadf_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1348:16: warning: unused function 'stbi_loadf' [-Wunused-function]
STBIDEF float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1436:16: warning: unused function 'stbi_hdr_to_ldr_gamma' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1/gamma; }
               ^
../inst/include/stb/stb_image.h:1437:16: warning: unused function 'stbi_hdr_to_ldr_scale' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1/scale; }
               ^
../inst/include/stb/stb_image.h:1430:16: warning: unused function 'stbi_ldr_to_hdr_gamma' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; }
               ^
../inst/include/stb/stb_image.h:1431:16: warning: unused function 'stbi_ldr_to_hdr_scale' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; }
               ^
../inst/include/stb/stb_image.h:1414:18: warning: unused function 'stbi_is_hdr_from_callbacks' [-Wunused-function]
STBIDEF int      stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user)
                 ^
../inst/include/stb/stb_image.h:1372:13: warning: unused function 'stbi_is_hdr_from_memory' [-Wunused-function]
STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:1386:18: warning: unused function 'stbi_is_hdr' [-Wunused-function]
STBIDEF int      stbi_is_hdr          (char const *filename)
                 ^
../inst/include/stb/stb_image.h:7293:13: warning: unused function 'stbi_info_from_memory' [-Wunused-function]
STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7300:13: warning: unused function 'stbi_info_from_callbacks' [-Wunused-function]
STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7307:13: warning: unused function 'stbi_is_16_bit_from_memory' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:7314:13: warning: unused function 'stbi_is_16_bit_from_callbacks' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *c, void *user)
            ^
../inst/include/stb/stb_image.h:7250:13: warning: unused function 'stbi_info' [-Wunused-function]
STBIDEF int stbi_info(char const *filename, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7271:13: warning: unused function 'stbi_is_16_bit' [-Wunused-function]
STBIDEF int stbi_is_16_bit(char const *filename)
            ^
../inst/include/stb/stb_image.h:4742:14: warning: unused function 'stbi_set_unpremultiply_on_load' [-Wunused-function]
STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply)
             ^
../inst/include/stb/stb_image.h:4747:14: warning: unused function 'stbi_convert_iphone_png_to_rgb' [-Wunused-function]
STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert)
             ^
../inst/include/stb/stb_image.h:999:14: warning: unused function 'stbi_set_flip_vertically_on_load' [-Wunused-function]
STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip)
             ^
../inst/include/stb/stb_image.h:4260:15: warning: unused function 'stbi_zlib_decode_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4281:13: warning: unused function 'stbi_zlib_decode_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, char const *ibuffer, int ilen)
            ^
../inst/include/stb/stb_image.h:4292:15: warning: unused function 'stbi_zlib_decode_noheader_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_noheader_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4308:13: warning: unused function 'stbi_zlib_decode_noheader_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen)
            ^
In file included from preprocess_split.cpp:9:
In file included from ../inst/include/mlpack/methods/preprocess/preprocess_split_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:32:
In file included from ../inst/include/mlpack/core/data/save.hpp:24:
In file included from ../inst/include/mlpack/core/data/save_image.hpp:26:
../inst/include/stb/stb_image_write.h:1182:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/stb/stb_image_write.h:482:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:580:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:754:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/stb/stb_image_write.h:1514:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/stb/stb_image_write.h:266:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
35 warnings generated.
clang++ -arch arm64 -std=gnu++17 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppEnsmallen/include' -I/opt/R/arm64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2  -c r_util.cpp -o r_util.o
In file included from r_util.cpp:14:
In file included from ../inst/include/mlpack/core/util/io.hpp:31:
In file included from ../inst/include/mlpack/core/data/load.hpp:26:
In file included from ../inst/include/mlpack/core/data/load_image.hpp:29:
../inst/include/stb/stb_image.h:1284:18: warning: unused function 'stbi_load_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1291:18: warning: unused function 'stbi_load_from_callbacks' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1299:18: warning: unused function 'stbi_load_gif_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1270:18: warning: unused function 'stbi_load_16_from_memory' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1277:18: warning: unused function 'stbi_load_16_from_callbacks' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1257:18: warning: unused function 'stbi_load_16' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16(char const *filename, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1333:16: warning: unused function 'stbi_loadf_from_memory' [-Wunused-function]
STBIDEF float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1340:16: warning: unused function 'stbi_loadf_from_callbacks' [-Wunused-function]
STBIDEF float *stbi_loadf_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1348:16: warning: unused function 'stbi_loadf' [-Wunused-function]
STBIDEF float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1436:16: warning: unused function 'stbi_hdr_to_ldr_gamma' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1/gamma; }
               ^
../inst/include/stb/stb_image.h:1437:16: warning: unused function 'stbi_hdr_to_ldr_scale' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1/scale; }
               ^
../inst/include/stb/stb_image.h:1430:16: warning: unused function 'stbi_ldr_to_hdr_gamma' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; }
               ^
../inst/include/stb/stb_image.h:1431:16: warning: unused function 'stbi_ldr_to_hdr_scale' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; }
               ^
../inst/include/stb/stb_image.h:1414:18: warning: unused function 'stbi_is_hdr_from_callbacks' [-Wunused-function]
STBIDEF int      stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user)
                 ^
../inst/include/stb/stb_image.h:1372:13: warning: unused function 'stbi_is_hdr_from_memory' [-Wunused-function]
STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:1386:18: warning: unused function 'stbi_is_hdr' [-Wunused-function]
STBIDEF int      stbi_is_hdr          (char const *filename)
                 ^
../inst/include/stb/stb_image.h:7293:13: warning: unused function 'stbi_info_from_memory' [-Wunused-function]
STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7300:13: warning: unused function 'stbi_info_from_callbacks' [-Wunused-function]
STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7307:13: warning: unused function 'stbi_is_16_bit_from_memory' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:7314:13: warning: unused function 'stbi_is_16_bit_from_callbacks' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *c, void *user)
            ^
../inst/include/stb/stb_image.h:7250:13: warning: unused function 'stbi_info' [-Wunused-function]
STBIDEF int stbi_info(char const *filename, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7271:13: warning: unused function 'stbi_is_16_bit' [-Wunused-function]
STBIDEF int stbi_is_16_bit(char const *filename)
            ^
../inst/include/stb/stb_image.h:4742:14: warning: unused function 'stbi_set_unpremultiply_on_load' [-Wunused-function]
STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply)
             ^
../inst/include/stb/stb_image.h:4747:14: warning: unused function 'stbi_convert_iphone_png_to_rgb' [-Wunused-function]
STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert)
             ^
../inst/include/stb/stb_image.h:999:14: warning: unused function 'stbi_set_flip_vertically_on_load' [-Wunused-function]
STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip)
             ^
../inst/include/stb/stb_image.h:4260:15: warning: unused function 'stbi_zlib_decode_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4281:13: warning: unused function 'stbi_zlib_decode_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, char const *ibuffer, int ilen)
            ^
../inst/include/stb/stb_image.h:4292:15: warning: unused function 'stbi_zlib_decode_noheader_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_noheader_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4308:13: warning: unused function 'stbi_zlib_decode_noheader_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen)
            ^
In file included from r_util.cpp:14:
In file included from ../inst/include/mlpack/core/util/io.hpp:32:
In file included from ../inst/include/mlpack/core/data/save.hpp:24:
In file included from ../inst/include/mlpack/core/data/save_image.hpp:26:
../inst/include/stb/stb_image_write.h:1182:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/stb/stb_image_write.h:482:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:580:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:754:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/stb/stb_image_write.h:1514:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/stb/stb_image_write.h:266:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
35 warnings generated.
clang++ -arch arm64 -std=gnu++17 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppEnsmallen/include' -I/opt/R/arm64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2  -c radical.cpp -o radical.o
In file included from radical.cpp:9:
In file included from ../inst/include/mlpack/methods/radical/radical_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:31:
In file included from ../inst/include/mlpack/core/data/load.hpp:26:
In file included from ../inst/include/mlpack/core/data/load_image.hpp:29:
../inst/include/stb/stb_image.h:1284:18: warning: unused function 'stbi_load_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1291:18: warning: unused function 'stbi_load_from_callbacks' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1299:18: warning: unused function 'stbi_load_gif_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1270:18: warning: unused function 'stbi_load_16_from_memory' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1277:18: warning: unused function 'stbi_load_16_from_callbacks' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1257:18: warning: unused function 'stbi_load_16' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16(char const *filename, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1333:16: warning: unused function 'stbi_loadf_from_memory' [-Wunused-function]
STBIDEF float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1340:16: warning: unused function 'stbi_loadf_from_callbacks' [-Wunused-function]
STBIDEF float *stbi_loadf_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1348:16: warning: unused function 'stbi_loadf' [-Wunused-function]
STBIDEF float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1436:16: warning: unused function 'stbi_hdr_to_ldr_gamma' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1/gamma; }
               ^
../inst/include/stb/stb_image.h:1437:16: warning: unused function 'stbi_hdr_to_ldr_scale' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1/scale; }
               ^
../inst/include/stb/stb_image.h:1430:16: warning: unused function 'stbi_ldr_to_hdr_gamma' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; }
               ^
../inst/include/stb/stb_image.h:1431:16: warning: unused function 'stbi_ldr_to_hdr_scale' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; }
               ^
../inst/include/stb/stb_image.h:1414:18: warning: unused function 'stbi_is_hdr_from_callbacks' [-Wunused-function]
STBIDEF int      stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user)
                 ^
../inst/include/stb/stb_image.h:1372:13: warning: unused function 'stbi_is_hdr_from_memory' [-Wunused-function]
STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:1386:18: warning: unused function 'stbi_is_hdr' [-Wunused-function]
STBIDEF int      stbi_is_hdr          (char const *filename)
                 ^
../inst/include/stb/stb_image.h:7293:13: warning: unused function 'stbi_info_from_memory' [-Wunused-function]
STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7300:13: warning: unused function 'stbi_info_from_callbacks' [-Wunused-function]
STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7307:13: warning: unused function 'stbi_is_16_bit_from_memory' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:7314:13: warning: unused function 'stbi_is_16_bit_from_callbacks' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *c, void *user)
            ^
../inst/include/stb/stb_image.h:7250:13: warning: unused function 'stbi_info' [-Wunused-function]
STBIDEF int stbi_info(char const *filename, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7271:13: warning: unused function 'stbi_is_16_bit' [-Wunused-function]
STBIDEF int stbi_is_16_bit(char const *filename)
            ^
../inst/include/stb/stb_image.h:4742:14: warning: unused function 'stbi_set_unpremultiply_on_load' [-Wunused-function]
STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply)
             ^
../inst/include/stb/stb_image.h:4747:14: warning: unused function 'stbi_convert_iphone_png_to_rgb' [-Wunused-function]
STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert)
             ^
../inst/include/stb/stb_image.h:999:14: warning: unused function 'stbi_set_flip_vertically_on_load' [-Wunused-function]
STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip)
             ^
../inst/include/stb/stb_image.h:4260:15: warning: unused function 'stbi_zlib_decode_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4281:13: warning: unused function 'stbi_zlib_decode_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, char const *ibuffer, int ilen)
            ^
../inst/include/stb/stb_image.h:4292:15: warning: unused function 'stbi_zlib_decode_noheader_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_noheader_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4308:13: warning: unused function 'stbi_zlib_decode_noheader_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen)
            ^
In file included from radical.cpp:9:
In file included from ../inst/include/mlpack/methods/radical/radical_main.cpp:13:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:32:
In file included from ../inst/include/mlpack/core/data/save.hpp:24:
In file included from ../inst/include/mlpack/core/data/save_image.hpp:26:
../inst/include/stb/stb_image_write.h:1182:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/stb/stb_image_write.h:482:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:580:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:754:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/stb/stb_image_write.h:1514:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/stb/stb_image_write.h:266:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
35 warnings generated.
clang++ -arch arm64 -std=gnu++17 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppEnsmallen/include' -I/opt/R/arm64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2  -c random_forest.cpp -o random_forest.o
In file included from random_forest.cpp:9:
In file included from ../inst/include/mlpack/methods/random_forest/random_forest_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:31:
In file included from ../inst/include/mlpack/core/data/load.hpp:26:
In file included from ../inst/include/mlpack/core/data/load_image.hpp:29:
../inst/include/stb/stb_image.h:1284:18: warning: unused function 'stbi_load_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1291:18: warning: unused function 'stbi_load_from_callbacks' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1299:18: warning: unused function 'stbi_load_gif_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1270:18: warning: unused function 'stbi_load_16_from_memory' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1277:18: warning: unused function 'stbi_load_16_from_callbacks' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1257:18: warning: unused function 'stbi_load_16' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16(char const *filename, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1333:16: warning: unused function 'stbi_loadf_from_memory' [-Wunused-function]
STBIDEF float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1340:16: warning: unused function 'stbi_loadf_from_callbacks' [-Wunused-function]
STBIDEF float *stbi_loadf_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1348:16: warning: unused function 'stbi_loadf' [-Wunused-function]
STBIDEF float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1436:16: warning: unused function 'stbi_hdr_to_ldr_gamma' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1/gamma; }
               ^
../inst/include/stb/stb_image.h:1437:16: warning: unused function 'stbi_hdr_to_ldr_scale' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1/scale; }
               ^
../inst/include/stb/stb_image.h:1430:16: warning: unused function 'stbi_ldr_to_hdr_gamma' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; }
               ^
../inst/include/stb/stb_image.h:1431:16: warning: unused function 'stbi_ldr_to_hdr_scale' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; }
               ^
../inst/include/stb/stb_image.h:1414:18: warning: unused function 'stbi_is_hdr_from_callbacks' [-Wunused-function]
STBIDEF int      stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user)
                 ^
../inst/include/stb/stb_image.h:1372:13: warning: unused function 'stbi_is_hdr_from_memory' [-Wunused-function]
STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:1386:18: warning: unused function 'stbi_is_hdr' [-Wunused-function]
STBIDEF int      stbi_is_hdr          (char const *filename)
                 ^
../inst/include/stb/stb_image.h:7293:13: warning: unused function 'stbi_info_from_memory' [-Wunused-function]
STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7300:13: warning: unused function 'stbi_info_from_callbacks' [-Wunused-function]
STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7307:13: warning: unused function 'stbi_is_16_bit_from_memory' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:7314:13: warning: unused function 'stbi_is_16_bit_from_callbacks' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *c, void *user)
            ^
../inst/include/stb/stb_image.h:7250:13: warning: unused function 'stbi_info' [-Wunused-function]
STBIDEF int stbi_info(char const *filename, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7271:13: warning: unused function 'stbi_is_16_bit' [-Wunused-function]
STBIDEF int stbi_is_16_bit(char const *filename)
            ^
../inst/include/stb/stb_image.h:4742:14: warning: unused function 'stbi_set_unpremultiply_on_load' [-Wunused-function]
STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply)
             ^
../inst/include/stb/stb_image.h:4747:14: warning: unused function 'stbi_convert_iphone_png_to_rgb' [-Wunused-function]
STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert)
             ^
../inst/include/stb/stb_image.h:999:14: warning: unused function 'stbi_set_flip_vertically_on_load' [-Wunused-function]
STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip)
             ^
../inst/include/stb/stb_image.h:4260:15: warning: unused function 'stbi_zlib_decode_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4281:13: warning: unused function 'stbi_zlib_decode_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, char const *ibuffer, int ilen)
            ^
../inst/include/stb/stb_image.h:4292:15: warning: unused function 'stbi_zlib_decode_noheader_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_noheader_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4308:13: warning: unused function 'stbi_zlib_decode_noheader_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen)
            ^
In file included from random_forest.cpp:9:
In file included from ../inst/include/mlpack/methods/random_forest/random_forest_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:32:
In file included from ../inst/include/mlpack/core/data/save.hpp:24:
In file included from ../inst/include/mlpack/core/data/save_image.hpp:26:
../inst/include/stb/stb_image_write.h:1182:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/stb/stb_image_write.h:482:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:580:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:754:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/stb/stb_image_write.h:1514:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/stb/stb_image_write.h:266:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
35 warnings generated.
clang++ -arch arm64 -std=gnu++17 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppEnsmallen/include' -I/opt/R/arm64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2  -c softmax_regression.cpp -o softmax_regression.o
In file included from softmax_regression.cpp:9:
In file included from ../inst/include/mlpack/methods/softmax_regression/softmax_regression_main.cpp:11:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:31:
In file included from ../inst/include/mlpack/core/data/load.hpp:26:
In file included from ../inst/include/mlpack/core/data/load_image.hpp:29:
../inst/include/stb/stb_image.h:1284:18: warning: unused function 'stbi_load_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1291:18: warning: unused function 'stbi_load_from_callbacks' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1299:18: warning: unused function 'stbi_load_gif_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1270:18: warning: unused function 'stbi_load_16_from_memory' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1277:18: warning: unused function 'stbi_load_16_from_callbacks' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1257:18: warning: unused function 'stbi_load_16' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16(char const *filename, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1333:16: warning: unused function 'stbi_loadf_from_memory' [-Wunused-function]
STBIDEF float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1340:16: warning: unused function 'stbi_loadf_from_callbacks' [-Wunused-function]
STBIDEF float *stbi_loadf_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1348:16: warning: unused function 'stbi_loadf' [-Wunused-function]
STBIDEF float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1436:16: warning: unused function 'stbi_hdr_to_ldr_gamma' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1/gamma; }
               ^
../inst/include/stb/stb_image.h:1437:16: warning: unused function 'stbi_hdr_to_ldr_scale' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1/scale; }
               ^
../inst/include/stb/stb_image.h:1430:16: warning: unused function 'stbi_ldr_to_hdr_gamma' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; }
               ^
../inst/include/stb/stb_image.h:1431:16: warning: unused function 'stbi_ldr_to_hdr_scale' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; }
               ^
../inst/include/stb/stb_image.h:1414:18: warning: unused function 'stbi_is_hdr_from_callbacks' [-Wunused-function]
STBIDEF int      stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user)
                 ^
../inst/include/stb/stb_image.h:1372:13: warning: unused function 'stbi_is_hdr_from_memory' [-Wunused-function]
STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:1386:18: warning: unused function 'stbi_is_hdr' [-Wunused-function]
STBIDEF int      stbi_is_hdr          (char const *filename)
                 ^
../inst/include/stb/stb_image.h:7293:13: warning: unused function 'stbi_info_from_memory' [-Wunused-function]
STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7300:13: warning: unused function 'stbi_info_from_callbacks' [-Wunused-function]
STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7307:13: warning: unused function 'stbi_is_16_bit_from_memory' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:7314:13: warning: unused function 'stbi_is_16_bit_from_callbacks' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *c, void *user)
            ^
../inst/include/stb/stb_image.h:7250:13: warning: unused function 'stbi_info' [-Wunused-function]
STBIDEF int stbi_info(char const *filename, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7271:13: warning: unused function 'stbi_is_16_bit' [-Wunused-function]
STBIDEF int stbi_is_16_bit(char const *filename)
            ^
../inst/include/stb/stb_image.h:4742:14: warning: unused function 'stbi_set_unpremultiply_on_load' [-Wunused-function]
STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply)
             ^
../inst/include/stb/stb_image.h:4747:14: warning: unused function 'stbi_convert_iphone_png_to_rgb' [-Wunused-function]
STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert)
             ^
../inst/include/stb/stb_image.h:999:14: warning: unused function 'stbi_set_flip_vertically_on_load' [-Wunused-function]
STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip)
             ^
../inst/include/stb/stb_image.h:4260:15: warning: unused function 'stbi_zlib_decode_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4281:13: warning: unused function 'stbi_zlib_decode_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, char const *ibuffer, int ilen)
            ^
../inst/include/stb/stb_image.h:4292:15: warning: unused function 'stbi_zlib_decode_noheader_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_noheader_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4308:13: warning: unused function 'stbi_zlib_decode_noheader_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen)
            ^
In file included from softmax_regression.cpp:9:
In file included from ../inst/include/mlpack/methods/softmax_regression/softmax_regression_main.cpp:11:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:32:
In file included from ../inst/include/mlpack/core/data/save.hpp:24:
In file included from ../inst/include/mlpack/core/data/save_image.hpp:26:
../inst/include/stb/stb_image_write.h:1182:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/stb/stb_image_write.h:482:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:580:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:754:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/stb/stb_image_write.h:1514:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/stb/stb_image_write.h:266:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
35 warnings generated.
clang++ -arch arm64 -std=gnu++17 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppEnsmallen/include' -I/opt/R/arm64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2  -c sparse_coding.cpp -o sparse_coding.o
In file included from sparse_coding.cpp:9:
In file included from ../inst/include/mlpack/methods/sparse_coding/sparse_coding_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:31:
In file included from ../inst/include/mlpack/core/data/load.hpp:26:
In file included from ../inst/include/mlpack/core/data/load_image.hpp:29:
../inst/include/stb/stb_image.h:1284:18: warning: unused function 'stbi_load_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1291:18: warning: unused function 'stbi_load_from_callbacks' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1299:18: warning: unused function 'stbi_load_gif_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1270:18: warning: unused function 'stbi_load_16_from_memory' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1277:18: warning: unused function 'stbi_load_16_from_callbacks' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1257:18: warning: unused function 'stbi_load_16' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16(char const *filename, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1333:16: warning: unused function 'stbi_loadf_from_memory' [-Wunused-function]
STBIDEF float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1340:16: warning: unused function 'stbi_loadf_from_callbacks' [-Wunused-function]
STBIDEF float *stbi_loadf_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1348:16: warning: unused function 'stbi_loadf' [-Wunused-function]
STBIDEF float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1436:16: warning: unused function 'stbi_hdr_to_ldr_gamma' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1/gamma; }
               ^
../inst/include/stb/stb_image.h:1437:16: warning: unused function 'stbi_hdr_to_ldr_scale' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1/scale; }
               ^
../inst/include/stb/stb_image.h:1430:16: warning: unused function 'stbi_ldr_to_hdr_gamma' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; }
               ^
../inst/include/stb/stb_image.h:1431:16: warning: unused function 'stbi_ldr_to_hdr_scale' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; }
               ^
../inst/include/stb/stb_image.h:1414:18: warning: unused function 'stbi_is_hdr_from_callbacks' [-Wunused-function]
STBIDEF int      stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user)
                 ^
../inst/include/stb/stb_image.h:1372:13: warning: unused function 'stbi_is_hdr_from_memory' [-Wunused-function]
STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:1386:18: warning: unused function 'stbi_is_hdr' [-Wunused-function]
STBIDEF int      stbi_is_hdr          (char const *filename)
                 ^
../inst/include/stb/stb_image.h:7293:13: warning: unused function 'stbi_info_from_memory' [-Wunused-function]
STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7300:13: warning: unused function 'stbi_info_from_callbacks' [-Wunused-function]
STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7307:13: warning: unused function 'stbi_is_16_bit_from_memory' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:7314:13: warning: unused function 'stbi_is_16_bit_from_callbacks' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *c, void *user)
            ^
../inst/include/stb/stb_image.h:7250:13: warning: unused function 'stbi_info' [-Wunused-function]
STBIDEF int stbi_info(char const *filename, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7271:13: warning: unused function 'stbi_is_16_bit' [-Wunused-function]
STBIDEF int stbi_is_16_bit(char const *filename)
            ^
../inst/include/stb/stb_image.h:4742:14: warning: unused function 'stbi_set_unpremultiply_on_load' [-Wunused-function]
STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply)
             ^
../inst/include/stb/stb_image.h:4747:14: warning: unused function 'stbi_convert_iphone_png_to_rgb' [-Wunused-function]
STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert)
             ^
../inst/include/stb/stb_image.h:999:14: warning: unused function 'stbi_set_flip_vertically_on_load' [-Wunused-function]
STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip)
             ^
../inst/include/stb/stb_image.h:4260:15: warning: unused function 'stbi_zlib_decode_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4281:13: warning: unused function 'stbi_zlib_decode_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, char const *ibuffer, int ilen)
            ^
../inst/include/stb/stb_image.h:4292:15: warning: unused function 'stbi_zlib_decode_noheader_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_noheader_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4308:13: warning: unused function 'stbi_zlib_decode_noheader_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen)
            ^
In file included from sparse_coding.cpp:9:
In file included from ../inst/include/mlpack/methods/sparse_coding/sparse_coding_main.cpp:12:
In file included from ../inst/include/mlpack/core.hpp:44:
In file included from ../inst/include/mlpack/core/util/io.hpp:32:
In file included from ../inst/include/mlpack/core/data/save.hpp:24:
In file included from ../inst/include/mlpack/core/data/save_image.hpp:26:
../inst/include/stb/stb_image_write.h:1182:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/stb/stb_image_write.h:482:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:580:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:754:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/stb/stb_image_write.h:1514:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/stb/stb_image_write.h:266:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
35 warnings generated.
clang++ -arch arm64 -std=gnu++17 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/Rcpp/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppArmadillo/include' -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.3/RcppEnsmallen/include' -I/opt/R/arm64/include   -I. -I../inst/include  -fPIC  -falign-functions=64 -Wall -g -O2  -c test_r_binding.cpp -o test_r_binding.o
In file included from test_r_binding.cpp:9:
In file included from ./mlpack/bindings/R/tests//test_r_binding_main.cpp:13:
In file included from ../inst/include/mlpack/core/util/io.hpp:31:
In file included from ../inst/include/mlpack/core/data/load.hpp:26:
In file included from ../inst/include/mlpack/core/data/load_image.hpp:29:
../inst/include/stb/stb_image.h:1284:18: warning: unused function 'stbi_load_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1291:18: warning: unused function 'stbi_load_from_callbacks' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1299:18: warning: unused function 'stbi_load_gif_from_memory' [-Wunused-function]
STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1270:18: warning: unused function 'stbi_load_16_from_memory' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1277:18: warning: unused function 'stbi_load_16_from_callbacks' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels)
                 ^
../inst/include/stb/stb_image.h:1257:18: warning: unused function 'stbi_load_16' [-Wunused-function]
STBIDEF stbi_us *stbi_load_16(char const *filename, int *x, int *y, int *comp, int req_comp)
                 ^
../inst/include/stb/stb_image.h:1333:16: warning: unused function 'stbi_loadf_from_memory' [-Wunused-function]
STBIDEF float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1340:16: warning: unused function 'stbi_loadf_from_callbacks' [-Wunused-function]
STBIDEF float *stbi_loadf_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1348:16: warning: unused function 'stbi_loadf' [-Wunused-function]
STBIDEF float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp)
               ^
../inst/include/stb/stb_image.h:1436:16: warning: unused function 'stbi_hdr_to_ldr_gamma' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1/gamma; }
               ^
../inst/include/stb/stb_image.h:1437:16: warning: unused function 'stbi_hdr_to_ldr_scale' [-Wunused-function]
STBIDEF void   stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1/scale; }
               ^
../inst/include/stb/stb_image.h:1430:16: warning: unused function 'stbi_ldr_to_hdr_gamma' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; }
               ^
../inst/include/stb/stb_image.h:1431:16: warning: unused function 'stbi_ldr_to_hdr_scale' [-Wunused-function]
STBIDEF void   stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; }
               ^
../inst/include/stb/stb_image.h:1414:18: warning: unused function 'stbi_is_hdr_from_callbacks' [-Wunused-function]
STBIDEF int      stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user)
                 ^
../inst/include/stb/stb_image.h:1372:13: warning: unused function 'stbi_is_hdr_from_memory' [-Wunused-function]
STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:1386:18: warning: unused function 'stbi_is_hdr' [-Wunused-function]
STBIDEF int      stbi_is_hdr          (char const *filename)
                 ^
../inst/include/stb/stb_image.h:7293:13: warning: unused function 'stbi_info_from_memory' [-Wunused-function]
STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7300:13: warning: unused function 'stbi_info_from_callbacks' [-Wunused-function]
STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7307:13: warning: unused function 'stbi_is_16_bit_from_memory' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len)
            ^
../inst/include/stb/stb_image.h:7314:13: warning: unused function 'stbi_is_16_bit_from_callbacks' [-Wunused-function]
STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *c, void *user)
            ^
../inst/include/stb/stb_image.h:7250:13: warning: unused function 'stbi_info' [-Wunused-function]
STBIDEF int stbi_info(char const *filename, int *x, int *y, int *comp)
            ^
../inst/include/stb/stb_image.h:7271:13: warning: unused function 'stbi_is_16_bit' [-Wunused-function]
STBIDEF int stbi_is_16_bit(char const *filename)
            ^
../inst/include/stb/stb_image.h:4742:14: warning: unused function 'stbi_set_unpremultiply_on_load' [-Wunused-function]
STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply)
             ^
../inst/include/stb/stb_image.h:4747:14: warning: unused function 'stbi_convert_iphone_png_to_rgb' [-Wunused-function]
STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert)
             ^
../inst/include/stb/stb_image.h:999:14: warning: unused function 'stbi_set_flip_vertically_on_load' [-Wunused-function]
STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip)
             ^
../inst/include/stb/stb_image.h:4260:15: warning: unused function 'stbi_zlib_decode_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4281:13: warning: unused function 'stbi_zlib_decode_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, char const *ibuffer, int ilen)
            ^
../inst/include/stb/stb_image.h:4292:15: warning: unused function 'stbi_zlib_decode_noheader_malloc' [-Wunused-function]
STBIDEF char *stbi_zlib_decode_noheader_malloc(char const *buffer, int len, int *outlen)
              ^
../inst/include/stb/stb_image.h:4308:13: warning: unused function 'stbi_zlib_decode_noheader_buffer' [-Wunused-function]
STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen)
            ^
In file included from test_r_binding.cpp:9:
In file included from ./mlpack/bindings/R/tests//test_r_binding_main.cpp:13:
In file included from ../inst/include/mlpack/core/util/io.hpp:32:
In file included from ../inst/include/mlpack/core/data/save.hpp:24:
In file included from ../inst/include/mlpack/core/data/save_image.hpp:26:
../inst/include/stb/stb_image_write.h:1182:14: warning: unused function 'stbi_write_png_to_func' [-Wunused-function]
STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
             ^
../inst/include/stb/stb_image_write.h:482:14: warning: unused function 'stbi_write_bmp_to_func' [-Wunused-function]
STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:580:14: warning: unused function 'stbi_write_tga_to_func' [-Wunused-function]
STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
             ^
../inst/include/stb/stb_image_write.h:754:14: warning: unused function 'stbi_write_hdr_to_func' [-Wunused-function]
STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
             ^
../inst/include/stb/stb_image_write.h:1514:14: warning: unused function 'stbi_write_jpg_to_func' [-Wunused-function]
STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
             ^
../inst/include/stb/stb_image_write.h:266:15: warning: unused function 'stbi_flip_vertically_on_write' [-Wunused-function]
STBIWDEF void stbi_flip_vertically_on_write(int flag)
              ^
35 warnings generated.
clang++ -arch arm64 -std=gnu++17 -dynamiclib -Wl,-headerpad_max_install_names -undefined dynamic_lookup -L/Library/Frameworks/R.framework/Resources/lib -L/opt/R/arm64/lib -o mlpack.so RcppExports.o adaboost.o approx_kfn.o bayesian_linear_regression.o cf.o dbscan.o decision_tree.o det.o emst.o fastmks.o gmm_generate.o gmm_probability.o gmm_train.o hmm_generate.o hmm_loglik.o hmm_train.o hmm_viterbi.o hoeffding_tree.o image_converter.o kde.o kernel_pca.o kfn.o kmeans.o knn.o krann.o lars.o linear_regression.o linear_svm.o lmnn.o local_coordinate_coding.o logistic_regression.o lsh.o mean_shift.o nbc.o nca.o nmf.o pca.o perceptron.o preprocess_binarize.o preprocess_describe.o preprocess_one_hot_encoding.o preprocess_scale.o preprocess_split.o r_util.o radical.o random_forest.o softmax_regression.o sparse_coding.o test_r_binding.o -L/Library/Frameworks/R.framework/Resources/lib -lRlapack -L/Library/Frameworks/R.framework/Resources/lib -lRblas -L/opt/gfortran/lib/gcc/aarch64-apple-darwin20.0/12.2.0 -L/opt/gfortran/lib -lgfortran -lemutls_w -lquadmath -F/Library/Frameworks/R.framework/.. -framework R -Wl,-framework -Wl,CoreFoundation
ld: warning: could not create compact unwind for ___emutls_get_address: registers 23 and 24 not saved contiguously in frame
installing to /Volumes/Builds/packages/big-sur-arm64/results/4.3/mlpack.Rcheck/00LOCK-mlpack/00new/mlpack/libs
** generating debug symbols (dSYM)
** R
** inst
** byte-compile and prepare package for lazy loading
** help
*** installing help indices
** building package indices
** testing if installed package can be loaded from temporary location
** checking absolute paths in shared objects and dynamic libraries
** testing if installed package can be loaded from final location
** testing if installed package keeps a record of temporary installation path
* DONE (mlpack)