+/* These can be defined only on other than Win32 systems */
+#ifndef SILC_WIN32
+
+/* Debugging */
+#undef SILC_DEBUG
+#undef SILC_STACKTRACE
+
+/* Multi-thread support */
+#undef SILC_HAVE_PTHREAD
+
+/* IPv6 Support */
+#undef HAVE_IPV6
+
+#endif /* SILC_WIN32 */
+