cc -pthread  -Wall -Wextra -Werror=implicit-function-declaration pthread/pthread_mutex_getprioceiling.c -o pthread/pthread_mutex_getprioceiling -D_GNU_SOURCE -D_BSD_SOURCE -D_ALL_SOURCE -D_DEFAULT_SOURCE -lm -lpthread -lrt -lintl -liconv
pthread/pthread_mutex_getprioceiling.c: In function ‘main’:
pthread/pthread_mutex_getprioceiling.c:13:23: error: implicit declaration of function ‘pthread_mutexattr_setprotocol’; did you mean ‘pthread_mutexattr_settype’? [-Wimplicit-function-declaration]
   13 |         if ( (errno = pthread_mutexattr_setprotocol(&attr, PTHREAD_PRIO_PROTECT)) )
      |                       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      |                       pthread_mutexattr_settype
pthread/pthread_mutex_getprioceiling.c:13:60: error: ‘PTHREAD_PRIO_PROTECT’ undeclared (first use in this function)
   13 |         if ( (errno = pthread_mutexattr_setprotocol(&attr, PTHREAD_PRIO_PROTECT)) )
      |                                                            ^~~~~~~~~~~~~~~~~~~~
pthread/pthread_mutex_getprioceiling.c:13:60: note: each undeclared identifier is reported only once for each function it appears in
pthread/pthread_mutex_getprioceiling.c:19:23: error: implicit declaration of function ‘pthread_mutex_getprioceiling’; did you mean ‘pthread_mutex_timedlock’? [-Wimplicit-function-declaration]
   19 |         if ( (errno = pthread_mutex_getprioceiling(&mutex, &priority)) )
      |                       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
      |                       pthread_mutex_timedlock