systemsettings

USE flags

• aqua - Include support for the Mac OS X Aqua (Carbon/Cocoa) GUI
• classic - Enable classic mode plugin, requires kde-frameworks/khtml
• debug - Enable extra debug codepaths, like asserts and extra output. If you want to get meaningful backtraces see https://wiki.gentoo.org/wiki/Project:Quality_Assurance/Backtraces
• gtk - Add support for x11-libs/gtk+ (The GIMP Toolkit)
• handbook - Enable handbooks generation for packages by KDE
• opengl - Add support for OpenGL (3D graphics)
• test - Enable dependencies and/or preparations necessary to run tests (usually controlled by FEATURES=test but can be toggled independently)
• usb - Add USB support to applications that have optional USB support (e.g. cups)