cc -pthread  -Wall -Wextra -Werror=implicit-function-declaration pthread/pthread_attr_setinheritsched.c -o pthread/pthread_attr_setinheritsched -D_GNU_SOURCE -D_BSD_SOURCE -D_ALL_SOURCE -D_DEFAULT_SOURCE -lm -lpthread -lrt -lintl -liconv
pthread/pthread_attr_setinheritsched.c: In function ‘main’:
pthread/pthread_attr_setinheritsched.c:16:21: error: ‘PTHREAD_SCOPE_SYSTEM’ undeclared (first use in this function)
   16 |         int scope = PTHREAD_SCOPE_SYSTEM;
      |                     ^~~~~~~~~~~~~~~~~~~~
pthread/pthread_attr_setinheritsched.c:16:21: note: each undeclared identifier is reported only once for each function it appears in
pthread/pthread_attr_setinheritsched.c:19:23: error: implicit declaration of function ‘pthread_getschedparam’ [-Wimplicit-function-declaration]
   19 |         if ( (errno = pthread_getschedparam(pthread_self(), &policy, &param)) )
      |                       ^~~~~~~~~~~~~~~~~~~~~
pthread/pthread_attr_setinheritsched.c:24:23: error: implicit declaration of function ‘pthread_attr_setscope’; did you mean ‘pthread_attr_destroy’? [-Wimplicit-function-declaration]
   24 |         if ( (errno = pthread_attr_setscope(&attr, scope)) )
      |                       ^~~~~~~~~~~~~~~~~~~~~
      |                       pthread_attr_destroy
pthread/pthread_attr_setinheritsched.c:26:23: error: implicit declaration of function ‘pthread_attr_setschedpolicy’; did you mean ‘pthread_attr_setstacksize’? [-Wimplicit-function-declaration]
   26 |         if ( (errno = pthread_attr_setschedpolicy(&attr, policy)) )
      |                       ^~~~~~~~~~~~~~~~~~~~~~~~~~~
      |                       pthread_attr_setstacksize
pthread/pthread_attr_setinheritsched.c:28:23: error: implicit declaration of function ‘pthread_attr_setschedparam’ [-Wimplicit-function-declaration]
   28 |         if ( (errno = pthread_attr_setschedparam(&attr, &param)) )
      |                       ^~~~~~~~~~~~~~~~~~~~~~~~~~
pthread/pthread_attr_setinheritsched.c:30:23: error: implicit declaration of function ‘pthread_attr_setinheritsched’; did you mean ‘pthread_attr_setstacksize’? [-Wimplicit-function-declaration]
   30 |         if ( (errno = pthread_attr_setinheritsched(&attr, PTHREAD_EXPLICIT_SCHED)) )
      |                       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
      |                       pthread_attr_setstacksize
pthread/pthread_attr_setinheritsched.c:30:59: error: ‘PTHREAD_EXPLICIT_SCHED’ undeclared (first use in this function)
   30 |         if ( (errno = pthread_attr_setinheritsched(&attr, PTHREAD_EXPLICIT_SCHED)) )
      |                                                           ^~~~~~~~~~~~~~~~~~~~~~