René J.V. Bertin authored Sep 25, 2017 and Kevin Funk committed Sep 25, 2017

Document how to determine which optional dependencies are used (e.g. QtWebKit instead of QtWebEngine

Summary:
As long as QtWebKit remains a supported option for documentation rendering users might want an option to build KDevelop against that library even if QWE is present on their system.

KDevelop uses enough resources of its own, so an option to avoid using the additional resource-hungry QWE is very welcome (after all, many will probably already have a chrome-based browser running).

This patch is the simplest possible implementation, and doesn't advertise itself by creating an option variable in the toplevel CMake file. I'd be happy to add that possibility though.

Test Plan: It would be nice if CMake's summary printed a list of optional dependencies that were disabled explicitly.

Reviewers: #kdevelop, apol, kfunk

Reviewed By: #kdevelop, kfunk

Subscribers: kfunk, apol, kdevelop-devel

Tags: #kdevelop

Differential Revision: https://phabricator.kde.org/D7950