cc -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  -liconv
pthread/pthread_mutex_consistent.c:26:16: error: call to undeclared function 'pthread_mutexattr_setrobust'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
   26 |         if ( (errno = pthread_mutexattr_setrobust(&attr, PTHREAD_MUTEX_ROBUST)) )
      |                       ^
pthread/pthread_mutex_consistent.c:26:51: error: use of undeclared identifier 'PTHREAD_MUTEX_ROBUST'
   26 |         if ( (errno = pthread_mutexattr_setrobust(&attr, PTHREAD_MUTEX_ROBUST)) )
      |                                                          ^
pthread/pthread_mutex_consistent.c:54:16: error: call to undeclared function 'pthread_mutex_consistent'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
   54 |         if ( (errno = pthread_mutex_consistent(&mutex)) )
      |                       ^
pthread/pthread_mutex_consistent.c:54:16: note: did you mean 'pthread_mutex_init'?
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/pthread.h:388:5: note: 'pthread_mutex_init' declared here
  388 | int pthread_mutex_init(pthread_mutex_t * __restrict,
      |     ^
3 errors generated.