cc -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations semaphore/sem_unlink.c -o semaphore/sem_unlink -D_POSIX_C_SOURCE=202405L -lm -lpthread -lrt -lintl -liconv
semaphore/sem_unlink.c:5:28: error: ‘sem_unlink’ undeclared here (not in a function); did you mean ‘sem_init’?
    5 | int (*foo)(const char *) = sem_unlink;
      |                            ^~~~~~~~~~
      |                            sem_init