src.c:3:26: error: call to undeclared function '_strnicmp'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
    3 |   int main(void) { (void)_strnicmp("", "", 0); return 0; }
      |                          ^
src.c:3:26: note: did you mean 'strncmp'?
/usr/include/string.h:140:12: note: 'strncmp' declared here
  140 | extern int strncmp (const char *__s1, const char *__s2, size_t __n)
      |            ^
1 error generated.