[Development] Switch the main "Qt Build System"

[Alexandru Croitor]

> On 9. Jun 2020, at 11:36, Edward Welbourne <edward.welbourne at qt.io> wrote:
> 
> Alexandru Croitor (9 June 2020 10:41)
>> I'll acknowledge that the current Qt Creator <-> Build Qt with CMake situation is sub-par.
> 
> Is there a P1 ticket open about that ?
> Might even warrant P0, given ...

I created a bug report here

And wrote a public wiki page on how to use Creator to open the Qt CMake projects. It contains the method i tried that worked for me (method 2)
and Eike's (method 1).

https://bugreports.qt.io/browse/QTCREATORBUG-24159

https://wiki.qt.io/CMake_Port/Qt_Creator