Compilation error from build.log if pyside is installed without USE="X": cd /var/tmp/portage/media-gfx/freecad-0.14.3702-r1/work/freecad-0.14.3702_build/src/Gui && /usr/bin/x86_64-pc-linux-gnu-g++ -DFreeCADGui_EXPORTS -DHAVE_CONFIG_H -DHAVE_PYSIDE -DHAVE_SHIBOKEN -DQT_CORE_LIB -DQT_GUI_LIB -DQT_NETWORK_LIB -DQT_OPENGL_LIB -DQT_SVG_LIB -DQT_UITOOLS_LIB -DQT_WEBKIT_LIB -DQT_XML_LIB -DSPNAV_FOUND -D_OCC64 -DNDEBUG -O2 -pipe -march=native -Wno-deprecated -Wno-write-strings -D_OCC64 -fPIC -I/var/tmp/portage/media-gfx/freecad-0.14.3702-r1/work/freecad-0.14.3702_build -isystem /usr/include/qt4 -isystem /usr/include/qt4/QtOpenGL -isystem /usr/include/qt4/QtSvg -isystem /usr/include/qt4/QtUiTools -isystem /usr/include/qt4/QtWebKit -isystem /usr/include/qt4/QtGui -isystem /usr/include/qt4/QtXml -isystem /usr/include/qt4/QtNetwork -isystem /usr/include/qt4/QtCore -I/var/tmp/portage/media-gfx/freecad-0.14.3702-r1/work/freecad-0.14.3702_build/src -I/var/tmp/portage/media-gfx/freecad-0.14.3702-r1/work/freecad-0.14.3702/src -I/var/tmp/portage/media-gfx/freecad-0.14.3702-r1/work/freecad-0.14.3702/src/Gui -I/var/tmp/portage/media-gfx/freecad-0.14.3702-r1/work/freecad-0.14.3702_build/src/Gui -I/var/tmp/portage/media-gfx/freecad-0.14.3702-r1/work/freecad-0.14.3702/src/Gui/.. -I/var/tmp/portage/media-gfx/freecad-0.14.3702-r1/work/freecad-0.14.3702_build/src/Gui/.. -I/var/tmp/portage/media-gfx/freecad-0.14.3702-r1/work/freecad-0.14.3702_build/src/Gui/Language -I/var/tmp/portage/media-gfx/freecad-0.14.3702-r1/work/freecad-0.14.3702_build/src/Gui/propertyeditor -I/var/tmp/portage/media-gfx/freecad-0.14.3702-r1/work/freecad-0.14.3702_build/src/Gui/TaskView -I/usr/include/coin -I/usr/include/python2.7 -I/usr/include/shiboken -I/usr/include/PySide -I/usr/include/PySide/QtCore -I/usr/include/PySide/QtGui -o CMakeFiles/FreeCADGui.dir/WidgetFactory.cpp.o -c /var/tmp/portage/media-gfx/freecad-0.14.3702-r1/work/freecad-0.14.3702/src/Gui/WidgetFactory.cpp /usr/bin/cmake -E cmake_progress_report /var/tmp/portage/media-gfx/freecad-0.14.3702-r1/work/freecad-0.14.3702_build/CMakeFiles [ 71%] /var/tmp/portage/media-gfx/freecad-0.14.3702-r1/work/freecad-0.14.3702/src/Gui/WidgetFactory.cpp:52:34: fatal error: pyside_qtgui_python.h: No such file or directory compilation terminated.
+ 13 Oct 2014; Michael Weber <xmw@gentoo.org> freecad-0.14.3702-r1.ebuild: + depend on dev-python/pyside[X] (bug 525206, thanks hakkikt@gmail.com) +