cc -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations inttypes/wcstoumax.c -o inttypes/wcstoumax -D_POSIX_C_SOURCE=202405L -lm -lpthread -lrt -lcrypt -latomic
inttypes/wcstoumax.c:5:24: error: unknown type name ‘wchar_t’
    5 | uintmax_t (*foo)(const wchar_t *restrict, wchar_t **restrict, int) = wcstoumax;
      |                        ^~~~~~~
inttypes/wcstoumax.c:2:1: note: ‘wchar_t’ is defined in header ‘<stddef.h>’; this is probably fixable by adding ‘#include <stddef.h>’
    1 | #include <inttypes.h>
  +++ |+#include <stddef.h>
    2 | #ifdef wcstoumax
inttypes/wcstoumax.c:5:43: error: unknown type name ‘wchar_t’
    5 | uintmax_t (*foo)(const wchar_t *restrict, wchar_t **restrict, int) = wcstoumax;
      |                                           ^~~~~~~
inttypes/wcstoumax.c:5:43: note: ‘wchar_t’ is defined in header ‘<stddef.h>’; this is probably fixable by adding ‘#include <stddef.h>’