cc -pipe -O   -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 -lrt  -lrt -lcrypt
pthread/pthread_mutexattr_getrobust.c: In function 'main':
pthread/pthread_mutexattr_getrobust.c:13:16: error: implicit declaration of function 'pthread_mutexattr_getrobust'; did you mean 'pthread_mutexattr_getprotocol'? [-Werror=implicit-function-declaration]
  if ( (errno = pthread_mutexattr_getrobust(&attr, &robustness)) )
                ^~~~~~~~~~~~~~~~~~~~~~~~~~~
                pthread_mutexattr_getprotocol
pthread/pthread_mutexattr_getrobust.c:15:21: error: 'PTHREAD_MUTEX_STALLED' undeclared (first use in this function); did you mean 'PTHREAD_MUTEX_DEFAULT'?
  if ( robustness != PTHREAD_MUTEX_STALLED )
                     ^~~~~~~~~~~~~~~~~~~~~
                     PTHREAD_MUTEX_DEFAULT
pthread/pthread_mutexattr_getrobust.c:15:21: note: each undeclared identifier is reported only once for each function it appears in
cc1: some warnings being treated as errors