Can we have a headersclean check for frameworks?

[Stephen Kelly]

Hi, 

Qt has a headersclean utility which runs each header through the compiler on 
its own. That verifies that it doesn't cause certain warnings, can compile 
in the presence of certain Qt defines, and includes or forward declares 
everything it should.

We don't have such a thing in KF5, but as shown by 

 https://quickgit.kde.org/?p=kconfigwidgets.git&a=commitdiff&h=2900814b

we would benefit from it.

Does anyone want to try to implement it (or borrow the Qt implementation) 
and integrate it?

We can probably add it to ECM and run it as part of the build of frameworks.

Thanks,

Steve.