pollution: sigstack
struct sigstack { char *ss_sp; int ss_onstack; }; 

pollution: bsd_signal
void (* _Nullable bsd_signal(int, void (* _Nullable)(int)))(int); 

pollution: sighold
int sighold(int); 

pollution: sigignore
int sigignore(int); 

pollution: siginterrupt
int siginterrupt(int, int); 

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

pollution: sigrelse
int sigrelse(int); 

pollution: sigset
void (* _Nullable sigset(int, void (* _Nullable)(int)))(int); 

pollution: POLL_ERR
#define POLL_ERR 4

pollution: POLL_HUP
#define POLL_HUP 6

pollution: POLL_IN
#define POLL_IN 1

pollution: POLL_MSG
#define POLL_MSG 3

pollution: POLL_OUT
#define POLL_OUT 2

pollution: POLL_PRI
#define POLL_PRI 5