_POSIX_ASYNCHRONOUS_IO
#if _POSIX_ASYNCHRONOUS_IO == 0
return (_POSIX_ASYNCHRONOUS_IO);
*valuep = _POSIX_ASYNCHRONOUS_IO;
p31b_setcfg(CTL_P1003_1B_ASYNCHRONOUS_IO, _POSIX_ASYNCHRONOUS_IO);
*ap->a_retval = _POSIX_ASYNCHRONOUS_IO;