From qt5/CMakeLists.txt: set(QTC_QT5_MODULES Qt5Core Qt5Gui Qt5Widgets Qt5Svg) So qtwidgets needs to be added to DEPEND, qtdbus seems to be optional in general. There seems to also be the option to build with X11-support: if(QTC_ENABLE_X11) set(QTC_QT5_MODULES ${QTC_QT5_MODULES} Qt5DBus Qt5X11Extras) endif() which now adds qtdbus + qtx11extras deps. So probably change deps to qt5? ( dev-qt/qtgui:5 dev-qt/qtsvg:5 dev-qt/qtwidgets:5 X? ( dev-qt/qtdbus:5 dev-qt/qtx11extras:5 ) ) These observations made by only reading the CMakeLists.txt. I did not yet try to build it as I hang in the middle of a (longer) Qt update as someone decided to drop the stable qt-5.1.1 from the qt-overlay :(
I didn't look too closely for Qt5 deps, as it isn't in the portage tree yet. So, thanks for the correction!