_iid
(((_bclabel_impl_t *)(l))->_bcl_il._iid == SUN_IL_ID || \
((_bclabel_impl_t *)(l))->_bcl_il._iid == SUN_IL_UN) : \
((l)->_iid = SUN_IL_ID, (l)->_i_c_len = _C_LEN, \