не компилится qt-gui

не могу скомпилить qt-gui-4.4.2.
вот что имею на выходе:

# tail -n 50 /var/tmp/portage/x11-libs/qt-gui-4.4.2-r1/temp/build.log 
moc itemviews/qsortfilterproxymodel.h
moc itemviews/qitemeditorfactory.cpp
moc itemviews/qstandarditemmodel.h
compiling itemviews/qstringlistmodel.cpp
compiling itemviews/qtreewidgetitemiterator.cpp
moc itemviews/qdatawidgetmapper.h
compiling itemviews/qfileiconprovider.cpp
moc itemviews/qcolumnview.h
compiling itemviews/qcolumnviewgrip.cpp
moc itemviews/qstyleditemdelegate.h
compiling inputmethod/qinputcontextfactory.cpp
compiling inputmethod/qinputcontextplugin.cpp
compiling inputmethod/qinputcontext.cpp
compiling inputmethod/qximinputcontext_x11.cpp
moc graphicsview/qgraphicsitem.h
compiling graphicsview/qgraphicsitemanimation.cpp
../../include/QtCore/../../src/corelib/tools/qrect.h: In member function ‘void QRect::setSize(const QSize&)’:
../../include/QtCore/../../src/corelib/tools/qrect.h:451: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://bugs.gentoo.org/> for instructions.
moc graphicsview/qgraphicsscene.h
compiling graphicsview/qgraphicsscene_bsp.cpp
compiling graphicsview/qgraphicssceneevent.cpp
The bug is not reproducible, so it is likely a hardware or OS problem.
make: *** [.obj/release-shared/qximinputcontext_x11.o] Error 1
make: *** Waiting for unfinished jobs....
 * 
 * ERROR: x11-libs/qt-gui-4.4.2-r1 failed.
 * Call stack:
 *               ebuild.sh, line   49:  Called src_compile
 *             environment, line 2789:  Called qt4-build_src_compile
 *             environment, line 2555:  Called build_target_directories
 *             environment, line  368:  Called build_directories '
 * src/gui
 * tools/designer
 * tools/linguist
 * src/plugins/imageformats/gif
 * src/plugins/imageformats/ico
 * src/plugins/imageformats/jpeg'
 *             environment, line  363:  Called die
 * The specific snippet of code:
 *           emake || die "emake failed";
 *  The die message:
 *   emake failed
 * 
 * If you need support, post the topmost build error, and the call stack if relevant.
 * A complete build log is located at '/var/tmp/portage/x11-libs/qt-gui-4.4.2-r1/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/x11-libs/qt-gui-4.4.2-r1/temp/environment'.
 * 

флаги

[ebuild  N    ] x11-libs/qt-gui-4.4.2-r1  USE="accessibility cups qt3support -dbus -debug -glib -mng -nas -nis -pch -tiff -xinerama" INPUT_DEVICES="-wacom" 0 kB

куда копать? подскажите пожалуйста =\