-/* Special cases - inhibiting the use of certain features. */
-
-/* Allow configure to inhibit use of FIONREAD. */
-#ifdef BROKEN_FIONREAD
-#undef FIONREAD
-#undef ASYNC
-#endif
-
-/* Interrupt input is not used if there is no FIONREAD. */
-#ifndef FIONREAD
-#undef SIGIO
-#endif
-
-\f