/opt/IBM/openxlC/17.1.1/bin/ibm-clang -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations pthread/pthread_rwlock_clockrdlock.c -o pthread/pthread_rwlock_clockrdlock -D_POSIX_C_SOURCE=202405L -lm -lpthread -lrt -latomic
pthread/pthread_rwlock_clockrdlock.c:5:86: error: use of undeclared identifier 'pthread_rwlock_clockrdlock'
int (*foo)(pthread_rwlock_t *restrict, clockid_t, const struct timespec *restrict) = pthread_rwlock_clockrdlock;
                                                                                     ^
1 error generated.