int sigwait(const sigset_t *__restrict, int *__restrict);
int sigwaitinfo(const sigset_t *__restrict, siginfo_t *__restrict);
int sigtimedwait(const sigset_t *__restrict, siginfo_t *__restrict, const struct timespec *__restrict);
-int sigqueue(pid_t, int, const union sigval);
+int sigqueue(pid_t, int, union sigval);
int pthread_sigmask(int, const sigset_t *__restrict, sigset_t *__restrict);
int pthread_kill(pthread_t, int);