cc -O2 -pthread  -Wall -Wextra -Werror=implicit-function-declaration pthread/pthread_mutex_consistent.c -o pthread/pthread_mutex_consistent -D_GNU_SOURCE -D_BSD_SOURCE -D_ALL_SOURCE -D_DEFAULT_SOURCE  -lm -lpthread -lrt  -lintl -lcrypt
pthread/pthread_mutex_consistent.c: In function 'main':
pthread/pthread_mutex_consistent.c:26:16: error: implicit declaration of function 'pthread_mutexattr_setrobust'; did you mean 'pthread_mutexattr_setprotocol'? [-Werror=implicit-function-declaration]
   26 |  if ( (errno = pthread_mutexattr_setrobust(&attr, PTHREAD_MUTEX_ROBUST)) )
      |                ^~~~~~~~~~~~~~~~~~~~~~~~~~~
      |                pthread_mutexattr_setprotocol
pthread/pthread_mutex_consistent.c:26:51: error: 'PTHREAD_MUTEX_ROBUST' undeclared (first use in this function); did you mean 'PTHREAD_MUTEX_DEFAULT'?
   26 |  if ( (errno = pthread_mutexattr_setrobust(&attr, PTHREAD_MUTEX_ROBUST)) )
      |                                                   ^~~~~~~~~~~~~~~~~~~~
      |                                                   PTHREAD_MUTEX_DEFAULT
pthread/pthread_mutex_consistent.c:26:51: note: each undeclared identifier is reported only once for each function it appears in
pthread/pthread_mutex_consistent.c:54:16: error: implicit declaration of function 'pthread_mutex_consistent'; did you mean 'pthread_mutex_init'? [-Werror=implicit-function-declaration]
   54 |  if ( (errno = pthread_mutex_consistent(&mutex)) )
      |                ^~~~~~~~~~~~~~~~~~~~~~~~
      |                pthread_mutex_init
cc1: some warnings being treated as errors