I got even deeper into the problem. It turns out that if the "Default for "Run in terminal"" option is enabled (Edit - Preferences - Build & Run), then this error will occur. Everything returns to normal if you disable this option.

My second solution would be much more portable.

Hi,

Use the amd64 command prompt when building Qt.

I have checked the source code of the qmakeevaluator and the changes are present in version 5.9.1, still it does not recognize the platform. Even if I try to hardcode to the qmake evaluator the following:

vars[ProKey("QMAKE_TARGET.arch")] = ProString("x86");

It does not change a thing, still tries to link qmake to x64.

@CybeX
1:I saw on google that someone else had this error with gcc 4.8. Upgrading solved it. Not saying it will for you. But was the only errors i could find in your log.
2: Sorry I don't know how to solve this. People are compiling for the PI but I never got around to try one
so the details of getting it to work is also unknown to me.
Update:
I have a good eye to https://www.ics.com/blog/configuring-qt-creator-raspberry-pi but no board so didnt try yet.

@jsulm said:

@Pixtar You can use Visual Studio 2013 Community which is more or less same as Professional.

Thanks for the hint. :D

Hi,

Do you mean that if you build with MinGW-32 it's all working fine but not with MinGW-64 ?

Hi,

Yes that helped me, thanks a lot.