eventual use of autoconf to build the server
*/
-/* un-Define this if your system does not have <unistd.h> */
-#define HAVE_UNISTD_H
+#if defined(WIN32)
+# define NO_UNISTD_H
+# define USES_WINSOCK
+#endif /* WIN32 */
+#if defined(__FreeBSD__) || defined(__NetBSD__)
+# define USE_LIMITS_H
+#endif
+
+#if defined(bsdi)
+# define USE_LIMITS_H
+#endif
+
+#if defined(bsdi_2_1)
+# define USE_LIMITS_H
+#endif
+
+#if defined(aix)
+# define NEED_SYS_SELECT_H
+#endif
+
+#if defined(irix5)
+# define NO_VFORK
+#endif