cc -pthread  -Wall -Wextra -Werror=implicit-function-declaration pthread/pthread_barrierattr_setpshared.c -o pthread/pthread_barrierattr_setpshared -D_GNU_SOURCE -D_BSD_SOURCE -D_ALL_SOURCE -D_DEFAULT_SOURCE  -lm -lpthread  -liconv
pthread/pthread_barrierattr_setpshared.c:14:2: error: unknown type name 'pthread_barrierattr_t'; did you mean 'pthread_mutexattr_t'?
   14 |         pthread_barrierattr_t attr;
      |         ^~~~~~~~~~~~~~~~~~~~~
      |         pthread_mutexattr_t
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/sys/_pthread/_pthread_mutexattr_t.h:31:38: note: 'pthread_mutexattr_t' declared here
   31 | typedef __darwin_pthread_mutexattr_t pthread_mutexattr_t;
      |                                      ^
pthread/pthread_barrierattr_setpshared.c:15:16: error: call to undeclared function 'pthread_barrierattr_init'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
   15 |         if ( (errno = pthread_barrierattr_init(&attr)) )
      |                       ^
pthread/pthread_barrierattr_setpshared.c:15:16: note: did you mean 'pthread_mutexattr_init'?
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/pthread.h:431:5: note: 'pthread_mutexattr_init' declared here
  431 | int pthread_mutexattr_init(pthread_mutexattr_t *);
      |     ^
pthread/pthread_barrierattr_setpshared.c:18:16: error: call to undeclared function 'pthread_barrierattr_setpshared'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
   18 |         if ( (errno = pthread_barrierattr_setpshared(&attr, shared)) )
      |                       ^
pthread/pthread_barrierattr_setpshared.c:18:16: note: did you mean 'pthread_mutexattr_setpshared'?
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/pthread.h:440:5: note: 'pthread_mutexattr_setpshared' declared here
  440 | int pthread_mutexattr_setpshared(pthread_mutexattr_t *, int);
      |     ^
pthread/pthread_barrierattr_setpshared.c:23:23: error: use of undeclared identifier 'pthread_barrier_t'
   23 |         size_t size = sizeof(pthread_barrier_t);
      |                              ^
pthread/pthread_barrierattr_setpshared.c:29:2: error: use of undeclared identifier 'pthread_barrier_t'
   29 |         pthread_barrier_t* barrier = ptr;
      |         ^
pthread/pthread_barrierattr_setpshared.c:29:21: error: use of undeclared identifier 'barrier'
   29 |         pthread_barrier_t* barrier = ptr;
      |                            ^
pthread/pthread_barrierattr_setpshared.c:30:16: error: call to undeclared function 'pthread_barrier_init'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
   30 |         if ( (errno = pthread_barrier_init(barrier, &attr, 2)) )
      |                       ^
pthread/pthread_barrierattr_setpshared.c:30:37: error: use of undeclared identifier 'barrier'
   30 |         if ( (errno = pthread_barrier_init(barrier, &attr, 2)) )
      |                                            ^
pthread/pthread_barrierattr_setpshared.c:35:16: error: call to undeclared function 'pthread_barrier_wait'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
   35 |         if ( (errno = pthread_barrier_wait(barrier)) &&
      |                       ^
pthread/pthread_barrierattr_setpshared.c:35:37: error: use of undeclared identifier 'barrier'
   35 |         if ( (errno = pthread_barrier_wait(barrier)) &&
      |                                            ^
pthread/pthread_barrierattr_setpshared.c:36:16: error: use of undeclared identifier 'PTHREAD_BARRIER_SERIAL_THREAD'
   36 |              errno != PTHREAD_BARRIER_SERIAL_THREAD )
      |                       ^
11 errors generated.