Index: build/v2/tools/qt4.jam
===================================================================
RCS file: /cvsroot/boost/boost/tools/build/v2/tools/qt4.jam,v
retrieving revision 1.20
diff -u -r1.20 qt4.jam
--- build/v2/tools/qt4.jam	18 Apr 2006 18:57:02 -0000	1.20
+++ build/v2/tools/qt4.jam	18 May 2006 18:43:29 -0000
@@ -47,6 +47,12 @@
 import os ;
 import virtual-target ;
 
+# Qt3Support for Qt built with bjam.
+# Defined here so that users can transparently switch from
+# prebuilt to bjam-built Qt libraries.
+# Todo: Detect Qt3Support from Qt's configure data.
+feature.feature qt3support : off on : propagated link-incompatible ;
+
 project.initialize $(__name__) ;
 project qt ;