#include <signal.h>
#include <errno.h>
-#include <pthread.h>
#include "syscall.h"
int pthread_sigmask(int how, const sigset_t *restrict set, sigset_t *restrict old)
{
int ret;
- if ((unsigned)how - SIG_BLOCK > 2U) return EINVAL;
+ if (set && (unsigned)how - SIG_BLOCK > 2U) return EINVAL;
ret = -__syscall(SYS_rt_sigprocmask, how, set, old, _NSIG/8);
if (!ret && old) {
if (sizeof old->__bits[0] == 8) {