ref: 4fc7dfcc3f4ca59064142c3c830b2720914b5e8c
dir: /lib/c/src/strcmp.c/
#include <string.h>
#undef strcmp
int
strcmp(const char *s1, const char *s2)
{
while (*s1 && *s2 && *s1 == *s2)
++s1, ++s2;
return *(unsigned char *)s1 - *(unsigned char *)s2;
}