Index: config.auto.h.in
===================================================================
--- config.auto.h.in	(revision 473)
+++ config.auto.h.in	(revision 474)
@@ -100,13 +100,7 @@
 /* Define to 1 if you have the <windows.h> header file. */
 /* #undef HAVE_WINDOWS_H */
 
-/* Define to 1 if Xinerama is available */
-#define HAVE_XINERAMA 1
 
-/* Define to 1 if Xrender is available */
-#define HAVE_XRENDER 1
-
-
 /* Define to 1 if you have the `_spawnvp' function. */
 /* #undef HAVE__SPAWNVP */
 
@@ -263,7 +257,12 @@
 	default print [@#define WRAP_S_ISLNK(x) @/target/libs/fs/stat/macros/S_ISLNK@(x)@]; end;
 end;
 
+print {\n\n/* Define to 1 if Xinerama is available */\n}
+print_ternary libs/gui/xinerama/presents {#define HAVE_XINERAMA 1} {#undef /* HAVE_XINERAMA 1 */}
 
+print {\n\n/* Define to 1 if Xrender is available */\n}
+print_ternary libs/gui/xrender/presents {#define HAVE_XRENDER 1} {#undef /* HAVE_XRENDER 1 */}
+
 print [@
 
 /* Directory separator char */