The --output-json parameter will make moc produce a .json file next to
the regular output file. With --collect-json the .json files for a
module can be merged into a single one.
Task-number: QTBUG-68796
Change-Id: I0e8fb802d47bd22da219701a8df947973d4bd7b5
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>
Reviewed-by: Ulf Hermann <ulf.hermann@qt.io>
