cc -O2 -pipe  -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations pthread/pthread_rwlock_clockwrlock.c -o pthread/pthread_rwlock_clockwrlock -D_POSIX_C_SOURCE=202405L  -lm -lpthread 
pthread/pthread_rwlock_clockwrlock.c:5:86: error: use of undeclared identifier 'pthread_rwlock_clockwrlock'
int (*foo)(pthread_rwlock_t *restrict, clockid_t, const struct timespec *restrict) = pthread_rwlock_clockwrlock;
                                                                                     ^
1 error generated.