cc -O2 -pipe  -pthread  -Wall -Wextra -Werror=implicit-function-declaration pthread/pthread_condattr_setpshared.c -o pthread/pthread_condattr_setpshared -D_GNU_SOURCE -D_BSD_SOURCE -D_ALL_SOURCE -D_DEFAULT_SOURCE  -lm -lpthread 
pthread/pthread_condattr_setpshared.c:46:16: error: call to undeclared function 'pthread_condattr_setpshared'; ISO C99 and later do not support implicit function declarations [-Werror,-Wimplicit-function-declaration]
   46 |         if ( (errno = pthread_condattr_setpshared(&condattr, shared)) )
      |                       ^
pthread/pthread_condattr_setpshared.c:46:16: note: did you mean 'pthread_rwlockattr_setpshared'?
/usr/include/pthread.h:252:6: note: 'pthread_rwlockattr_setpshared' declared here
  252 | int             pthread_rwlockattr_setpshared(pthread_rwlockattr_t *, int);
      |                 ^
pthread/pthread_condattr_setpshared.c:55:16: error: call to undeclared function 'pthread_mutexattr_setpshared'; ISO C99 and later do not support implicit function declarations [-Werror,-Wimplicit-function-declaration]
   55 |         if ( (errno = pthread_mutexattr_setpshared(&mutexattr, shared)) )
      |                       ^
2 errors generated.