Problem linking qtx while building GUI on Gentoo

Hello,

I am writing ebuilds for salome. I am now in the process of writing an ebuild for salome-gui and I encounter the following problem:

(cd . && ln -s SUIT_Selector_moc.lo SUIT_Selector_moc.o)
(cd . && ln -s SUIT_Accel_moc.lo SUIT_Accel_moc.o)
i686-pc-linux-gnu-gcc -shared  SUIT_ActionOperation.lo SUIT_Application.lo SUIT_DataObject.lo SUIT_DataObjectIterator.lo SUIT_DataObjectKey.lo SUIT_DataOwner.lo SUIT_Desktop.lo SUIT_ExceptionHandler.lo SUIT_FileDlg.lo SUIT_FileValidator.lo SUIT_MessageBox.lo SUIT_Operation.lo SUIT_OverrideCursor.lo SUIT_ParserSettings.lo SUIT_PopupClient.lo SUIT_ResourceMgr.lo SUIT_SelectionMgr.lo SUIT_Selector.lo SUIT_Session.lo SUIT_Study.lo SUIT_ToolButton.lo SUIT_Tools.lo SUIT_ViewManager.lo SUIT_ViewModel.lo SUIT_ViewWindow.lo SUIT_SelectionFilter.lo SUIT_Accel.lo SUIT_ActionOperation_moc.lo SUIT_Application_moc.lo SUIT_DataObject_moc.lo SUIT_Desktop_moc.lo SUIT_FileDlg_moc.lo SUIT_Operation_moc.lo SUIT_PopupClient_moc.lo SUIT_Session_moc.lo SUIT_Study_moc.lo SUIT_ToolButton_moc.lo SUIT_ViewModel_moc.lo SUIT_ViewWindow_moc.lo SUIT_ViewManager_moc.lo SUIT_SelectionMgr_moc.lo SUIT_Selector_moc.lo SUIT_Accel_moc.lo  -L../../lib/salome -lstdc++ -L/usr/qt/3/lib -lqt-mt -lqtx -lnsl -lm -ldl -lc  -Wl,-soname -Wl,libsuit.so.0 -o .libs/libsuit.so.0.0.0
/usr/lib/gcc/i686-pc-linux-gnu/4.1.2/../../../../i686-pc-linux-gnu/bin/ld: cannot find -lqtx
collect2: ld returned 1 exit status
make[3]: *** [libsuit.la] Error 1
make[3]: Leaving directory `/var/tmp/portage/sci-misc/salome-gui-3.2.6/work/salome3.2.6_SRC/GUI_SRC_3.2.6/src/SUIT'
make[2]: *** [lib_SUIT] Error 2
../../libtool --mode=compile i686-pc-linux-gnu-g++ -march=prescott -mfpmath=sse -Os -pipe -O  -Wno-deprecated -Wparentheses -Wreturn-type -Wunused -pthread -DOMNIORB_VERSION=4 -D__x86__ -D__linux__ -DCOMP_CORBA_DOUBLE -DCOMP_CORBA_LONG -I../../include/salome -I. -I. -I/usr/include -I/usr/include/omniORB4 -I/usr/include/COS  -I/usr/qt/3/include -DQT_THREAD_SUPPORT -DQT_CLEAN_NAMESPACE -c QtxWorkstackAction_moc.cxx

What is qtx? Does it belong to salome-gui?
How can this be solved?

Daniel