Moving KWayland to frameworks

[Martin Graesslin]

Hi,

after the Plasma 5.5 release I would like to move KWayland to frameworks. The 
main reason is that it is oddly placed in plasma-workspace as it's also a 
library useful for applications (example kde-connect uses it already).

KWayland is designed to be a tier1/integration framework. The current 
dependencies are:
* QtGui 
* Wayland Client (1.7)
* Wayland Server (1.7)
* EGL

License is  LGPL version 2.1, or version 3 or later versions approved by the 
membership of KDE e.V.

There are two things which make the move to frameworks difficult and I don't 
see a solution to it at the moment:

1. We require C++11 without exceptions: reason, it's designed for Linux and it 
didn't come to my mind to restrict us on the compiler due to lack of support 
in Visual Studio.

2. We use Qt 5.4.

For item 1 I only see the possibility of adding an exception [1]. For 2 it 
might be possible to get it down to 5.3 again. The biggest usage of Qt 5.4 
code is the new QSignalSpy syntax in autotests. I don't want to remove that, 
but it's of course possible to make autotests to only build with Qt 5.4. Of 
course I would also accept an exception ;-)

Given the release schedule I would target either the January or February 
frameworks release for inclusion.

Opinions?

Best Regards
Martin Gräßlin


[1] It might make sense to formalize the exception that integration frameworks 
which are not buildable on some platforms are not bound to restrictions of 
that framework.
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