cc -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 -lnetwork -lbsd -latomic
pthread/PTHREAD_MUTEX_ROBUST.c:2:17: error: 'PTHREAD_MUTEX_ROBUST' undeclared here (not in a function); did you mean 'PTHREAD_MUTEX_DEFAULT'?
    2 | int const foo = PTHREAD_MUTEX_ROBUST;
      |                 ^~~~~~~~~~~~~~~~~~~~
      |                 PTHREAD_MUTEX_DEFAULT