qt Build Qt using the C++11 standard Build the extra compatibility layer required by a few packages, see http://labs.qt.nokia.com/2010/06/22/qt-assistant-compat-version-available-as-extra-source-package/ Add support for exceptions - like catching them inside the event loop (recommended by Nokia) Enable dev-libs/glib eventloop support Build a window system agnostic implementation of Qt Enable the Qt3Support libraries for Qt4. Note that this does not mean you can compile pure Qt3 programs with Qt4. Build the 'qttracereplay' utility which is required to play drawings recorded with the trace graphicssystem https://bugreports.qt-project.org/ http://qt-project.org/doc/