Found the following significant warnings:
  ./criteria.h:45:33: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  ./criteria.h:48:33: 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/clusterCrit.Rcheck/00install.out’ for details.
* used C compiler: ‘Debian clang version 15.0.6’
* used Fortran compiler: ‘GNU Fortran (Debian 12.2.0-14) 12.2.0’
File ‘clusterCrit/libs/clusterCrit.so’:
  Found ‘__sprintf_chk’, possibly from ‘sprintf’ (C)
    Object: ‘criteria.o’

Compiled code should not call entry points which might terminate R nor
write to stdout/stderr instead of to the console, nor use Fortran I/O
nor system RNGs nor [v]sprintf.

See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual.
Found the following significant warnings:
  criteria.h:45:1: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  criteria.h:48:1: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
See ‘/home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/clusterCrit.Rcheck/00install.out’ for details.
* used C compiler: ‘gcc-12 (Debian 12.2.0-14) 12.2.0’
* used Fortran compiler: ‘GNU Fortran (Debian 12.2.0-14) 12.2.0’
File ‘clusterCrit/libs/clusterCrit.so’:
  Found ‘__sprintf_chk’, possibly from ‘sprintf’ (C)
    Object: ‘criteria.o’

Compiled code should not call entry points which might terminate R nor
write to stdout/stderr instead of to the console, nor use Fortran I/O
nor system RNGs nor [v]sprintf.

See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual.
Found the following significant warnings:
  ./criteria.h:45:33: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  ./criteria.h:48:33: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
See ‘/data/gannet/ripley/R/packages/tests-clang/clusterCrit.Rcheck/00install.out’ for details.
* used C compiler: ‘clang version 16.0.0’
* used Fortran compiler: ‘GNU Fortran (GCC) 12.2.1 20221121 (Red Hat 12.2.1-4)’
possible bashism in cleanup line 15 (brace expansion):
  rm -f src/*.{o,so,mod}
  possible bashism in cleanup line 17 (brace expansion):
  rm -f config.{log,status}
  possible bashism in cleanup line 22 (brace expansion):
  rm -f vignettes/*.{tex,aux,bbl,blg,log,toc,idx,ind,ilg,out,synctex.gz}
File ‘clusterCrit/libs/clusterCrit.so’:
  Found ‘sprintf’, possibly from ‘sprintf’ (C)
    Object: ‘criteria.o’

Compiled code should not call entry points which might terminate R nor
write to stdout/stderr instead of to the console, nor use Fortran I/O
nor system RNGs nor [v]sprintf.

See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual.
Found the following significant warnings:
  criteria.h:45:1: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  criteria.h:48:1: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
See ‘/data/gannet/ripley/R/packages/tests-devel/clusterCrit.Rcheck/00install.out’ for details.
* used C compiler: ‘gcc (GCC) 12.2.1 20221121 (Red Hat 12.2.1-4)’
* used Fortran compiler: ‘GNU Fortran (GCC) 12.2.1 20221121 (Red Hat 12.2.1-4)’
possible bashism in cleanup line 15 (brace expansion):
  rm -f src/*.{o,so,mod}
  possible bashism in cleanup line 17 (brace expansion):
  rm -f config.{log,status}
  possible bashism in cleanup line 22 (brace expansion):
  rm -f vignettes/*.{tex,aux,bbl,blg,log,toc,idx,ind,ilg,out,synctex.gz}
File ‘clusterCrit/libs/clusterCrit.so’:
  Found ‘__sprintf_chk’, possibly from ‘sprintf’ (C)
    Object: ‘criteria.o’

Compiled code should not call entry points which might terminate R nor
write to stdout/stderr instead of to the console, nor use Fortran I/O
nor system RNGs nor [v]sprintf.

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