_thr_attr_setschedpolicy
__weak_reference(_thr_attr_setschedpolicy, pthread_attr_setschedpolicy);
__weak_reference(_thr_attr_setschedpolicy, _pthread_attr_setschedpolicy);
[PJT_ATTR_SETSCHEDPOLICY] = {DUAL_ENTRY(_thr_attr_setschedpolicy)},
int _thr_attr_setschedpolicy(pthread_attr_t *, int);