qt Add support for exceptions - like catching them inside the event loop (recommended by Nokia) Enable dev-libs/glib eventloop support Enable qmake optimization 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" Enables JIT for Javascript usage inside Qt Build Qt using the C++11 standard Build a window system agnostic implementation of Qt