cc -pthread  -Wall -Wextra -Werror=implicit-function-declaration pthread/pthread_barrierattr_getpshared.c -o pthread/pthread_barrierattr_getpshared -D_GNU_SOURCE -D_BSD_SOURCE -D_ALL_SOURCE -D_DEFAULT_SOURCE -lm -lpthread -lrt -lintl -liconv
pthread/pthread_barrierattr_getpshared.c: In function ‘main’:
pthread/pthread_barrierattr_getpshared.c:11:23: error: implicit declaration of function ‘pthread_barrierattr_init’; did you mean ‘pthread_mutexattr_init’? [-Wimplicit-function-declaration]
   11 |         if ( (errno = pthread_barrierattr_init(&attr)) )
      |                       ^~~~~~~~~~~~~~~~~~~~~~~~
      |                       pthread_mutexattr_init
pthread/pthread_barrierattr_getpshared.c:14:23: error: implicit declaration of function ‘pthread_barrierattr_getpshared’ [-Wimplicit-function-declaration]
   14 |         if ( (errno = pthread_barrierattr_getpshared(&attr, &got_shared)) )
      |                       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
pthread/pthread_barrierattr_getpshared.c:16:28: error: ‘PTHREAD_PROCESS_PRIVATE’ undeclared (first use in this function)
   16 |         if ( got_shared != PTHREAD_PROCESS_PRIVATE )
      |                            ^~~~~~~~~~~~~~~~~~~~~~~
pthread/pthread_barrierattr_getpshared.c:16:28: note: each undeclared identifier is reported only once for each function it appears in
pthread/pthread_barrierattr_getpshared.c:18:22: error: ‘PTHREAD_PROCESS_SHARED’ undeclared (first use in this function)
   18 |         int shared = PTHREAD_PROCESS_SHARED;
      |                      ^~~~~~~~~~~~~~~~~~~~~~
pthread/pthread_barrierattr_getpshared.c:19:23: error: implicit declaration of function ‘pthread_barrierattr_setpshared’ [-Wimplicit-function-declaration]
   19 |         if ( (errno = pthread_barrierattr_setpshared(&attr, shared)) )
      |                       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~