pollution: crypt
char *crypt(const char *, const char *); 

pollution: gethostid
long gethostid(void); 

pollution: lockf
int lockf(int, int, off_t) __asm("_" "lockf" ); 

pollution: nice
int nice(int) __asm("_" "nice" ); 

pollution: setpgrp
pid_t setpgrp(void) __asm("_" "setpgrp" ); 

pollution: setregid
int setregid(gid_t, gid_t) __asm("_" "setregid" ); 

pollution: setreuid
int setreuid(uid_t, uid_t) __asm("_" "setreuid" ); 

pollution: swab
void swab(const void * restrict, void * restrict, ssize_t); 

pollution: sync
void sync(void); 

pollution: ualarm
useconds_t ualarm(useconds_t, useconds_t); 

pollution: usleep
int usleep(useconds_t) __asm("_" "usleep" ); 

pollution: vfork
pid_t vfork(void) __attribute__((availability(watchos,unavailable))) __attribute__((availability(tvos,unavailable)));