qt Use EGL instead of default GLX to manage OpenGL contexts on the desktop Add support for exceptions - like catching them inside the event loop (recommended by Nokia) Enable dev-libs/glib eventloop support Enable the Qt3Support libraries for Qt4. Note that this does not mean you can compile pure Qt3 programs with Qt4. Install Qt declarative private headers required by Qt-creator QmlDesigner and QmlInspector plugins" Use the alternative raster graphicssystem as default rendering engine Build the new 'trace' graphicsssytem engine which allows to record all drawing operations into a trace buffer. Later it can be replayed with the qttracereplay utility