Found the following significant warnings:
  SoDA_init.c:5:23: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  crc32.c:161:23: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  crc32.c:204:21: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  crc32.c:244:21: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  digest_C.c:180:21: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
See '/home/hornik/tmp/R.check/r-devel-clang/Work/PKGS/SoDA.Rcheck/00install.out' for details.
Found the following significant warnings:
  SoDA_init.c:5:1: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  crc32.c:161:23: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  digest_C.c:180:7: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
See ‘/home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/SoDA.Rcheck/00install.out’ for details.
Found the following significant warnings:
  SoDA_init.c:5:23: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  crc32.c:161:23: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  crc32.c:204:21: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  crc32.c:244:21: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  digest_C.c:180:21: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
See ‘/data/gannet/ripley/R/packages/tests-clang/SoDA.Rcheck/00install.out’ for details.
File ‘SoDA/libs/SoDA.so’:
  Found no call to: ‘R_useDynamicSymbols’

It is good practice to register native routines and to disable symbol
search.

See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual.
Found the following significant warnings:
  SoDA_init.c:5:1: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  crc32.c:161:23: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  digest_C.c:180:7: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
See ‘/data/gannet/ripley/R/packages/tests-devel/SoDA.Rcheck/00install.out’ for details.
File ‘SoDA/libs/SoDA.so’:
  Found no call to: ‘R_useDynamicSymbols’

It is good practice to register native routines and to disable symbol
search.

See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual.