pollution: index
char *index (const char *__s, int __c); 

pollution: rindex
char *rindex(const char *__s, int __c); 

pollution: ffs
int ffs(int __word); 

pollution: bcmp
int bcmp(const void *__s1, const void *__s2, size_t __n); 

pollution: bcopy
void bcopy(const void *__s1, void *__s2, size_t __n); 

pollution: bzero
void bzero(void *__s, size_t __n); 

pollution: explicit_bzero
void explicit_bzero(void *__s, size_t __len);