x86_64-managarm-gcc -pthread  -Wall -Wextra -Werror=implicit-function-declaration pthread/pthread_mutex_setprioceiling.c -o pthread/pthread_mutex_setprioceiling -D_GNU_SOURCE -D_BSD_SOURCE -D_ALL_SOURCE -D_DEFAULT_SOURCE -lm -lpthread -lrt -lintl -liconv
pthread/pthread_mutex_setprioceiling.c: In function ‘main’:
pthread/pthread_mutex_setprioceiling.c:19:23: error: implicit declaration of function ‘pthread_mutex_setprioceiling’; did you mean ‘pthread_mutexattr_setprioceiling’? [-Wimplicit-function-declaration]
   19 |         if ( (errno = pthread_mutex_setprioceiling(&mutex, 31, &old)) )
      |                       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
      |                       pthread_mutexattr_setprioceiling