cc -pipe -O   -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations pthread/PTHREAD_MUTEX_ROBUST.c -o pthread/PTHREAD_MUTEX_ROBUST -D_POSIX_C_SOURCE=202405L  -lm -lpthread -lrt  -lrt -lcrypt
pthread/PTHREAD_MUTEX_ROBUST.c:2:17: error: 'PTHREAD_MUTEX_ROBUST' undeclared here (not in a function); did you mean 'PTHREAD_MUTEX_NORMAL'?
 int const foo = PTHREAD_MUTEX_ROBUST;
                 ^~~~~~~~~~~~~~~~~~~~
                 PTHREAD_MUTEX_NORMAL