+/*! Does the display have the Sync extension? */
+extern gboolean extensions_sync;
+/*! Base for events for the Sync extension */
+extern gint extensions_sync_event_basep;
+
+/*! Does the display have the Composite extension? */
+extern gboolean extensions_comp;
+/*! Base for events for the Composite extension */
+extern gint extensions_comp_event_basep;
+