clang -O2  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations semaphore/O_CREAT.c -o semaphore/O_CREAT -D_POSIX_C_SOURCE=202405L  -lm  -lintl
semaphore/O_CREAT.c:3:2: error: "O_CREAT is not defined"
#error "O_CREAT is not defined"
 ^
1 error generated.