cc -O2 -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations semaphore/sem_clockwait.c -o semaphore/sem_clockwait -D_POSIX_C_SOURCE=202405L  -lm -lpthread -lrt  -lintl -lcrypt
semaphore/sem_clockwait.c:5:75: error: 'sem_clockwait' undeclared here (not in a function); did you mean 'sem_wait'?
    5 | int (*foo)(sem_t *restrict, clockid_t, const struct timespec *restrict) = sem_clockwait;
      |                                                                           ^~~~~~~~~~~~~
      |                                                                           sem_wait