Index: qt4-build.eclass
===================================================================
RCS file: /var/cvsroot/gentoo-x86/eclass/qt4-build.eclass,v
retrieving revision 1.74
diff -u -b -B -u -r1.74 qt4-build.eclass
--- qt4-build.eclass	30 May 2010 10:31:05 -0000	1.74
+++ qt4-build.eclass	30 Jun 2010 21:52:57 -0000
@@ -277,6 +277,9 @@
 	sed -i -e '/^QMAKE_\(LIB\|INC\)DIR\(_X11\|_OPENGL\|\)\t/s/=.*$/=/' \
 		mkspecs/$(qt_mkspecs_dir)/qmake.conf || die
 
+	#strip predefined CFLAGS from qmake ( bug #312689 )
+	sed -i "/QMAKE_CFLAGS_RELEASE/,+1 s:+=.*:+=:" mkspecs/common/g++.conf
+
 	base_src_prepare
 }