cc -pthread  -Wall -Wextra -Werror=implicit-function-declaration pthread/pthread_mutexattr_setrobust.c -o pthread/pthread_mutexattr_setrobust -D_GNU_SOURCE -D_BSD_SOURCE -D_ALL_SOURCE -D_DEFAULT_SOURCE -lm -lpthread -lnetwork -lbsd -latomic
pthread/pthread_mutexattr_setrobust.c: In function 'main':
pthread/pthread_mutexattr_setrobust.c:12:23: error: implicit declaration of function 'pthread_mutexattr_setrobust'; did you mean 'pthread_mutexattr_settype'? [-Werror=implicit-function-declaration]
   12 |         if ( (errno = pthread_mutexattr_setrobust(&attr, PTHREAD_MUTEX_ROBUST)) )
      |                       ^~~~~~~~~~~~~~~~~~~~~~~~~~~
      |                       pthread_mutexattr_settype
pthread/pthread_mutexattr_setrobust.c:12:58: error: 'PTHREAD_MUTEX_ROBUST' undeclared (first use in this function); did you mean 'PTHREAD_MUTEX_DEFAULT'?
   12 |         if ( (errno = pthread_mutexattr_setrobust(&attr, PTHREAD_MUTEX_ROBUST)) )
      |                                                          ^~~~~~~~~~~~~~~~~~~~
      |                                                          PTHREAD_MUTEX_DEFAULT
pthread/pthread_mutexattr_setrobust.c:12:58: note: each undeclared identifier is reported only once for each function it appears in
pthread/pthread_mutexattr_setrobust.c:15:23: error: implicit declaration of function 'pthread_mutexattr_getrobust'; did you mean 'pthread_mutexattr_gettype'? [-Werror=implicit-function-declaration]
   15 |         if ( (errno = pthread_mutexattr_getrobust(&attr, &robustness)) )
      |                       ^~~~~~~~~~~~~~~~~~~~~~~~~~~
      |                       pthread_mutexattr_gettype
cc1: some warnings being treated as errors