The list of classes was first sorted topologically, then alphabetically in the AbstractMetaBuilder and finally again topologically in the CppGenerator with an additional dependency QObiect/QMetaObject. Move the sort functionality taking the QObiect/QMetaObject dependency into account from the generator to the AbstractMetaBuilder. Move all sorting functionality to helper sortLists(). The classesTopologicalSorted() helper is then no longer needed by the generators and can be removed from the ApiExtractor. Pick-to: 6.0 Change-Id: I03c799118296393bdd0f3de84427b50ab29153b0 Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org> Reviewed-by: Christian Tismer <tismer@stackless.com>