#ifndef _STRINGS_H #define _STRINGS_H 1 // https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/strings.h.html #include <sys/cdefs.h> __BEGIN_DECLS #include <bits/types/locale_t.h> #define __need_size_t #include <sys/types.h> int ffs(int i); int strcasecmp(const char* s1, const char* s2); int strcasecmp_l(const char* s1, const char* s2, locale_t locale); int strncasecmp(const char* s1, const char* s2, size_t n); int strncasecmp_l(const char* s1, const char* s2, size_t n, locale_t locale); __END_DECLS #endif