cc -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations sys_sem/struct-sembuf-sem_num.c -o sys_sem/struct-sembuf-sem_num -D_POSIX_C_SOURCE=202405L -lm -lpthread -lrt -lintl -liconv
sys_sem/struct-sembuf-sem_num.c:7:10: fatal error: sys/sem.h: No such file or directory
    7 | #include <sys/sem.h>
      |          ^~~~~~~~~~~
compilation terminated.