Accessing the Arch module amongst others generates an error: "Cannot import name qtsvg" or similar and menus don't appear. A quick search reveals that FreeCAD uses pyside and mine did not have USE=svg. I added the flag and a quick emerge later, the Arch module now loads properly. Reproducible: Always Steps to Reproduce: 1. Have dev-python/pyside with USE=-svg 2. Run FreeCAD, select Arch module 3. Actual Results: Error message. Menus and toolbars don't get added Expected Results: Arch module to load along with extra toolbars and menus I'm not sure at what point FreeCAD switched from PyQT4 to pyside. I'm no expert here and only going by forum postings. Older versions might need PyQT4 +svg instead.
commit de8e6963f76f9326e0b5f5e1e20dcb0c8ceca9ec Author: Michael Weber <xmw@gentoo.org> Date: Fri Sep 18 17:26:28 2015 +0200 media-gfx/freecad: add dev-python/pyside[svg] (thanks Jon Gerdes, bug 560494).