Hi.
suggesting that the functions I'm looking for are missing entirely. Is that so?
Yes. They are optional part, see http://pubs.opengroup.org/onlinepubs/9699919799/functions/pthread_mutexattr_setprioceiling.html http://pubs.opengroup.org/onlinepubs/9699919799/functions/pthread_mutexattr_setprotocol.html We do not (yet) support Thread Priority Protection or Thread Priority Inheritance options. We advertise this in our <bits/posix_opt.h> by /* No support for priority inheritance or protection. */ #define _POSIX_THREAD_PRIO_INHERIT -1 #define _POSIX_THREAD_PRIO_PROTECT -1 Petr