cc -pthread  -Wall -Wextra -Werror=implicit-function-declaration pthread/pthread_barrierattr_init.c -o pthread/pthread_barrierattr_init -D_GNU_SOURCE -D_BSD_SOURCE -D_ALL_SOURCE -D_DEFAULT_SOURCE -lm -lpthread -lrt -lintl -liconv
pthread/pthread_barrierattr_init.c: In function ‘main’:
pthread/pthread_barrierattr_init.c:10:23: error: implicit declaration of function ‘pthread_barrierattr_init’; did you mean ‘pthread_mutexattr_init’? [-Wimplicit-function-declaration]
   10 |         if ( (errno = pthread_barrierattr_init(&attr)) )
      |                       ^~~~~~~~~~~~~~~~~~~~~~~~
      |                       pthread_mutexattr_init