_POSIX_THREAD_KEYS_MAX
return _POSIX_THREAD_KEYS_MAX;
if (pthread_keys_max < _POSIX_THREAD_KEYS_MAX)
pthread_keys_max = _POSIX_THREAD_KEYS_MAX;
#ifdef _POSIX_THREAD_KEYS_MAX
{ "_POSIX_THREAD_KEYS_MAX", _POSIX_THREAD_KEYS_MAX, 128 },