cc -pthread  -Wall -Wextra -Werror=implicit-function-declaration pthread/pthread_mutexattr_getrobust.c -o pthread/pthread_mutexattr_getrobust -D_GNU_SOURCE -D_BSD_SOURCE -D_ALL_SOURCE -D_DEFAULT_SOURCE -lm -lpthread -lnetwork -lbsd -latomic
pthread/pthread_mutexattr_getrobust.c: In function 'main':
pthread/pthread_mutexattr_getrobust.c:13:23: error: implicit declaration of function 'pthread_mutexattr_getrobust'; did you mean 'pthread_mutexattr_gettype'? [-Werror=implicit-function-declaration]
   13 |         if ( (errno = pthread_mutexattr_getrobust(&attr, &robustness)) )
      |                       ^~~~~~~~~~~~~~~~~~~~~~~~~~~
      |                       pthread_mutexattr_gettype
pthread/pthread_mutexattr_getrobust.c:15:28: error: 'PTHREAD_MUTEX_STALLED' undeclared (first use in this function); did you mean 'PTHREAD_MUTEX_DEFAULT'?
   15 |         if ( robustness != PTHREAD_MUTEX_STALLED )
      |                            ^~~~~~~~~~~~~~~~~~~~~
      |                            PTHREAD_MUTEX_DEFAULT
pthread/pthread_mutexattr_getrobust.c:15:28: note: each undeclared identifier is reported only once for each function it appears in
cc1: some warnings being treated as errors