diff -r 56cd8111b7f7 -r 41300fa6a67c src/gui/kernel/qt_x11_p.h
--- a/src/gui/kernel/qt_x11_p.h	Tue Jan 26 12:42:25 2010 +0200
+++ b/src/gui/kernel/qt_x11_p.h	Tue Feb 02 00:43:10 2010 +0200
@@ -163,7 +163,9 @@
 #endif // QT_NO_XRENDER
 
 #ifndef QT_NO_XSYNC
+extern "C" {
 #  include "X11/extensions/sync.h"
+}
 #endif
 
 // #define QT_NO_XKB
@@ -428,6 +430,7 @@
 
     // true if Qt is compiled w/ MIT-SHM support and MIT-SHM is supported on the connected Display
     bool use_mitshm;
+    bool use_mitshm_pixmaps;
     int mitshm_major;
 
     // true if Qt is compiled w/ Tablet support and we have a tablet.