I've tried to emerge qt-creator-3.2.2, but it fails with the message: "emake failed". I append the final part of the log:

x86_64-pc-linux-gnu-g++ Wl,-O1 -Wl,sort-common -Wl,as-needed -Wl,-z,origin '-Wl,-rpath,$ORIGIN:$ORIGIN/..' -Wl,-no-undefined -shared -Wl,-soname,libCppTools.so -o libCppTools.so .obj/release-shared/abstracteditorsupport.o .obj/release-shared/builtinindexingsupport.o .obj/release-shared/commentssettings.o .obj/release-shared/completionsettingspage.o .obj/release-shared/cppchecksymbols.o .obj/release-shared/cppclassesfilter.o .obj/release-shared/cppcodeformatter.o .obj/release-shared/cppcodemodelinspectordumper.o .obj/release-shared/cppcodemodelsettings.o .obj/release-shared/cppcodemodelsettingspage.o .obj/release-shared/cppcodestylepreferences.o .obj/release-shared/cppcodestylepreferencesfactory.o .obj/release-shared/cppcodestylesettings.o .obj/release-shared/cppcodestylesettingspage.o .obj/release-shared/cppcompletionassist.o .obj/release-shared/cppcompletionassistprovider.o .obj/release-shared/cppcurrentdocumentfilter.o .obj/release-shared/cppdoxygen.o .obj/release-shared/cppfilesettingspage.o .obj/release-shared/cppfindreferences.o .obj/release-shared/cppfunctionsfilter.o .obj/release-shared/cpphighlightingsupport.o .obj/release-shared/cpphighlightingsupportinternal.o .obj/release-shared/cppindexingsupport.o .obj/release-shared/cpplocalsymbols.o .obj/release-shared/cpplocatordata.o .obj/release-shared/cpplocatorfilter.o .obj/release-shared/cppmodelmanager.o .obj/release-shared/cppmodelmanagerinterface.o .obj/release-shared/cppmodelmanagersupport.o .obj/release-shared/cppmodelmanagersupportinternal.o .obj/release-shared/cpppointerdeclarationformatter.o .obj/release-shared/cppprojectfile.o .obj/release-shared/cppqtstyleindenter.o .obj/release-shared/cpprefactoringchanges.o .obj/release-shared/cppsemanticinfo.o .obj/release-shared/cppsnapshotupdater.o .obj/release-shared/cppsourceprocessor.o .obj/release-shared/cpptoolseditorsupport.o .obj/release-shared/cpptoolsplugin.o .obj/release-shared/cpptoolsreuse.o .obj/release-shared/cpptoolssettings.o .obj/release-shared/doxygengenerator.o .obj/release-shared/functionutils.o .obj/release-shared/includeutils.o .obj/release-shared/indexitem.o .obj/release-shared/insertionpointlocator.o .obj/release-shared/searchsymbols.o .obj/release-shared/stringtable.o .obj/release-shared/symbolfinder.o .obj/release-shared/symbolsfindfilter.o .obj/release-shared/typehierarchybuilder.o .obj/release-shared/moc_abstracteditorsupport.o .obj/release-shared/moc_completionsettingspage.o .obj/release-shared/moc_cppclassesfilter.o .obj/release-shared/moc_cppcodeformatter.o .obj/release-shared/moc_cppcodemodelsettingspage.o .obj/release-shared/moc_cppcodestylepreferences.o .obj/release-shared/moc_cppcodestylesettingspage.o .obj/release-shared/moc_cppcompletionassist.o .obj/release-shared/moc_cppcompletionassistprovider.o .obj/release-shared/moc_cppcurrentdocumentfilter.o .obj/release-shared/moc_cppfilesettingspage.o .obj/release-shared/moc_cppfindreferences.o .obj/release-shared/moc_cppfunctionsfilter.o .obj/release-shared/moc_cppindexingsupport.o .obj/release-shared/moc_cpplocatordata.o .obj/release-shared/moc_cpplocatorfilter.o .obj/release-shared/moc_cppmodelmanager.o .obj/release-shared/moc_cppmodelmanagerinterface.o .obj/release-shared/moc_cpptoolseditorsupport.o .obj/release-shared/moc_cpptoolsplugin.o .obj/release-shared/moc_cpptoolssettings.o .obj/release-shared/moc_stringtable.o .obj/release-shared/moc_symbolsfindfilter.o .obj/release-shared/qrc_cpptools.o -L/usr/lib64/qt4 -L/var/tmp/portage/dev-qt/qt-creator-3.2.2/work/qt-creator-opensource-src-3.2.2/lib64/qtcreator -L/var/tmp/portage/dev-qt/qt-creator-3.2.2/work/qt-creator-opensource-src-3.2.2/lib64/qtcreator/plugins -lCore -lProjectExplorer -lTextEditor -lCPlusPlus -lQtcSsh -lAggregation -lExtensionSystem -lUtils -lLanguageUtils -lQtGui -L/usr/lib64/qt4 -L/usr/X11R6/lib -lQtNetwork -lQtCore -lpthread
mv -f libCppTools.so ../../../lib64/qtcreator/plugins/
make[3]: Leaving directory `/var/tmp/portage/dev-qt/qt-creator-3.2.2/work/qt-creator-opensource-src-3.2.2/src/plugins/cpptools'
make[2]: Leaving directory `/var/tmp/portage/dev-qt/qt-creator-3.2.2/work/qt-creator-opensource-src-3.2.2/src/plugins'
make[1]: *** [sub-plugins-make_default-ordered] Error 2
make[1]: Leaving directory `/var/tmp/portage/dev-qt/qt-creator-3.2.2/work/qt-creator-opensource-src-3.2.2/src'
make: *** [sub-src-make_default-ordered] Error 2

• ERROR: dev-qt/qt-creator-3.2.2 failed (compile phase):
• emake failed
• If you need support, post the output of `emerge --info '=dev-qt/qt-creator-3.2.2'`,
• the complete build log and the output of `emerge -pqv '=dev-qt/qt-creator-3.2.2'`.
• The complete build log is located at '/var/tmp/portage/dev-qt/qt-creator-3.2.2/temp/build.log'.
• The ebuild environment file is located at '/var/tmp/portage/dev-qt/qt-creator-3.2.2/temp/environment'.
• Working directory: '/var/tmp/portage/dev-qt/qt-creator-3.2.2/work/qt-creator-opensource-src-3.2.2'
• S: '/var/tmp/portage/dev-qt/qt-creator-3.2.2/work/qt-creator-opensource-src-3.2.2'