* installing *source* package ‘wcc’ ...
** this is package ‘wcc’ version ‘0.2’
** using staged installation
** libs
using C compiler: ‘Debian clang version 21.1.8 (3+b1)’
clang-21 -std=gnu23 -I"/home/hornik/tmp/R-d-clang-21/include" -DNDEBUG   -I/usr/local/include -DUSE_TYPE_CHECKING_STRICT -D_FORTIFY_SOURCE=3   -fpic  -g -O3 -Wall -pedantic -c cmdLineParse.c -o cmdLineParse.o
cmdLineParse.c:46:7: error: call to undeclared library function 'strcmp' with type 'int (const char *, const char *)'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
   46 |                 if (strcmp(*argv, "-o") == 0) { /* output file name */
      |                     ^
cmdLineParse.c:46:7: note: include the header <string.h> or explicitly provide a declaration for 'strcmp'
cmdLineParse.c:56:8: error: call to undeclared library function 'strlen' with type 'unsigned long (const char *)'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
   56 |                         if (strlen(fileNameStr) > MAXFILENAMELEN) {
      |                             ^
cmdLineParse.c:56:8: note: include the header <string.h> or explicitly provide a declaration for 'strlen'
cmdLineParse.c:60:4: error: call to undeclared library function 'strcpy' with type 'char *(char *, const char *)'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
   60 |                         strcpy(outputFile, *argv);
      |                         ^
cmdLineParse.c:60:4: note: include the header <string.h> or explicitly provide a declaration for 'strcpy'
cmdLineParse.c:197:22: error: call to undeclared library function 'strdup' with type 'char *(const char *)'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
  197 |         cmdRet->inputFile = strdup(inputFile);
      |                             ^
cmdLineParse.c:197:22: note: include the header <string.h> or explicitly provide a declaration for 'strdup'
4 errors generated.
make: *** [/home/hornik/tmp/R-d-clang-21/etc/Makeconf:190: cmdLineParse.o] Error 1
ERROR: compilation failed for package ‘wcc’
* removing ‘/srv/hornik/tmp/CRAN_pretest/wcc.Rcheck/wcc’