+/* The signal handler prototype */
+#undef wxTYPE_SA_HANDLER
+
+/* gettimeofday() usually takes 2 arguments, but some really old systems might
+ * have only one, in which case define WX_GETTIMEOFDAY_NO_TZ */
+#undef WX_GETTIMEOFDAY_NO_TZ
+
+/* struct tm doesn't always have the tm_gmtoff field, define this if it does */
+#undef WX_GMTOFF_IN_TM
+
+/* iconv()'s 2nd argument is char ** and not const char ** */
+#undef WX_ICONV_TAKES_CHAR
+
+/* Define if you have pw_gecos field in struct passwd */
+#undef HAVE_PW_GECOS
+