cc -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations semaphore/sem_timedwait.c -o semaphore/sem_timedwait -D_POSIX_C_SOURCE=202405L  -lm -lpthread  -liconv
semaphore/sem_timedwait.c:5:64: error: use of undeclared identifier 'sem_timedwait'; did you mean 'sem_trywait'?
    5 | int (*foo)(sem_t *restrict, const struct timespec *restrict) = sem_timedwait;
      |                                                                ^~~~~~~~~~~~~
      |                                                                sem_trywait
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/sys/semaphore.h:58:5: note: 'sem_trywait' declared here
   58 | int sem_trywait(sem_t *);
      |     ^
semaphore/sem_timedwait.c:5:7: error: incompatible function pointer types initializing 'int (*)(sem_t *restrict, const struct timespec *restrict)' (aka 'int (*)(int *restrict, const struct timespec *restrict)') with an expression of type 'int (sem_t *)' (aka 'int (int *)') [-Wincompatible-function-pointer-types]
    5 | int (*foo)(sem_t *restrict, const struct timespec *restrict) = sem_timedwait;
      |       ^                                                        ~~~~~~~~~~~~~
2 errors generated.