_thr_attr_getguardsize
__weak_reference(_thr_attr_getguardsize, pthread_attr_getguardsize);
__weak_reference(_thr_attr_getguardsize, _pthread_attr_getguardsize);
[PJT_ATTR_GETGUARDSIZE] = {DUAL_ENTRY(_thr_attr_getguardsize)},
int _thr_attr_getguardsize(const pthread_attr_t * __restrict,