clang -O2  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations pthread/pthread_cleanup_push.c -o pthread/pthread_cleanup_push -D_POSIX_C_SOURCE=202405L  -lm  -lintl
pthread/pthread_cleanup_push.c:1:10: fatal error: 'pthread.h' file not found
#include <pthread.h>
         ^
1 error generated.