cc -O2 -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 -lrt  -lintl -lcrypt
pthread/pthread_barrierattr_setpshared.c: In function 'main':
pthread/pthread_barrierattr_setpshared.c:18:16: error: implicit declaration of function 'pthread_barrierattr_setpshared'; did you mean 'pthread_barrierattr_destroy'? [-Werror=implicit-function-declaration]
   18 |  if ( (errno = pthread_barrierattr_setpshared(&attr, shared)) )
      |                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      |                pthread_barrierattr_destroy
cc1: some warnings being treated as errors