cc -pthread  -Wall -Wextra -Werror=implicit-function-declaration pthread/pthread_mutexattr_setpshared.c -o pthread/pthread_mutexattr_setpshared -D_GNU_SOURCE -D_BSD_SOURCE -D_ALL_SOURCE -D_DEFAULT_SOURCE -lm -lpthread -lrt -lintl -liconv
pthread/pthread_mutexattr_setpshared.c: In function ‘main’:
pthread/pthread_mutexattr_setpshared.c:23:22: error: ‘PTHREAD_PROCESS_SHARED’ undeclared (first use in this function)
   23 |         int shared = PTHREAD_PROCESS_SHARED;
      |                      ^~~~~~~~~~~~~~~~~~~~~~
pthread/pthread_mutexattr_setpshared.c:23:22: note: each undeclared identifier is reported only once for each function it appears in
pthread/pthread_mutexattr_setpshared.c:24:23: error: implicit declaration of function ‘pthread_mutexattr_setpshared’; did you mean ‘pthread_mutexattr_settype’? [-Wimplicit-function-declaration]
   24 |         if ( (errno = pthread_mutexattr_setpshared(&attr, shared)) )
      |                       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
      |                       pthread_mutexattr_settype