KDevelop starter questions regarding Build and Source Control

Hi,

Started to evaluate KDevelop (mainly Linux & C++), basically the
parser seems promising.
Yet, didn't find answers to the following questions regarding KDevelop
5.1, could you please shed some light (or refer to updated manual or
other resource) ?
1. Created JSON compilation DB file (compile_commands.json), but where
KDevelop should be configured to use it for the project ?
2. Is there a way to provide several JSON compilation commands - one
per each platform/mode ?
3. How support in another source-control might be introduced  (is
there any template/plugins framework) ?
4. Does KDevelop has a mechanism similar to QTCreator of wizards -
http://doc.qt.io/qtcreator/creator-project-wizards-json.html ?

Thanks in advance,
     Yinon