cc -pipe -O   -pthread  -Wall -Wextra -Werror=implicit-function-declaration pthread/pthread_setschedprio.c -o pthread/pthread_setschedprio -D_GNU_SOURCE -D_BSD_SOURCE -D_ALL_SOURCE -D_DEFAULT_SOURCE  -lm -lpthread -lrt  -lrt -lcrypt
pthread/pthread_setschedprio.c: In function 'main':
pthread/pthread_setschedprio.c:20:16: error: implicit declaration of function 'pthread_setschedprio'; did you mean 'pthread_setschedparam'? [-Werror=implicit-function-declaration]
  if ( (errno = pthread_setschedprio(pthread_self(), priority)) /*&&
                ^~~~~~~~~~~~~~~~~~~~
                pthread_setschedparam
cc1: some warnings being treated as errors