We have a bunch of generic plugins like src/plugins/generic/evdevmouse/evdevmouse.pro which specify

PLUGIN_EXTENDS = -

This means the plugin should not automatically be loaded (or linked in static Qt builds). We don't port this information to the CMake projects. We should to that by augmenting pro2cmake.

Most likely by leveraging the DEFAULT_IF option of qt_internal_add_plugin, but it could be the case that the mechanism needs to be modified, because it doesn't quite match qmake's behavior.

Note that currently we hardcode platform and generic plugins needing to be opt-in, when generating qt_plugin .pri files in
https://codereview.qt-project.org/c/qt/qtbase/+/300007 which might need to be revised when we have proper information in the converted CMake projects.