How to change compiler in QT Creator?

[Tomi]

Hi,

Two years ago I installed QT 5.14.0. I use compiler MinGW 7.3.0. Now I would like to use compiler MinGW 8.1.0, which I can download using QT online installer.

What's next?

I know that I have to go to Tools -> Options -> Compilers.

I add here g++.exe and gcc.exe from ....\Tools\mingw810_64\bin\ folder.

Now I have to add qmake.exe ( qt version tab in Kits ). I don't have it on my ....\Tools\mingw810_64\bin\ folder. I can use only from ......\Qt5.14.0\5.14.0\mingw73_64\bin, but when I select it I get error, that this version is already registered. I can copy file qmake.exe from ......\Qt5.14.0\5.14.0\mingw73_64\bin folder and paste it to the ....\Tools\mingw810_64\bin\ folder, but I don't know is it the correct solution.

And what's next?

[Axel Spoerl]

If your installation is correct, the "Re-detect" button recognizes all compilers as well as qmake, which should be in compiler's bin subdirectory. Copying a qmake.exe binary from an older compiler version may be worth a try but it is likely to break. If your binary installation is broken and you don't find the missing qmake.exe, you have to compile it from source using cmake.