After build from source, and install, getting errors trying to use it in Qt Creator

  • After I do the "configure", "jom" and "jom install" steps, I get a Qt build in the -prefix folder. But if I try to manually create a Qt kit using that folder, I always get a

    Qt version is not properly installed. please run make install

    Error in the Qt Versions tab of the Manage Kits dialog inside of Qt Creator. If I expand it to see the details, it says "Invalid Qt Version".

    Am I supposed to move that somewhere so Qt Creator is happy? What is it looking for exactly that it isn't find? I would also like to share this build with my fellow developers. Can I just zip the folder up and give it to them to unzip onto their hard drive?

    Mind you, I am getting the aforementioned install errors (see my previous post). But as it is complaining about files already there, I'm thinking that isn't my problem here.


  • Lifetime Qt Champion


    Did you first add a new Qt version using your self built Qt ?
    What parameters did you pass exactly to configure ?

  • Yes, this is the error I'm getting when I try to Add.. from the Qt Versions tab. Here's my configure line (it's a big one because I'm skipping a bunch of modules):

    %_ROOT%\configure -prefix %_ROOT%\..\5.12.1-32-release -nomake examples -nomake tests -skip qtandroidextras -skip qtgamepad -skip qtmacextras -skip qtquickcontrols -skip qt3d -skip qtcanvas3d -skip qtx11extras -skip qtactiveqt -skip qtcharts -skip qtdatavis3d -skip qtpurchasing -skip qtquickcontrols2 -skip qtvirtualkeyboard -skip qtwayland -opensource -opengl dynamic -confirm-license

    And I'm trying to use the qmake found in the 5.12.1-32-release/bin folder.

  • Lifetime Qt Champion

    What do you get if your run qmake directly from the command line ?

  • So if I run this:

    F:\Qt\5.12.1\msvc2017_32\bin>qmake --version          
    QMake version 3.1                                     
    Using Qt version 5.12.1 in c:/5.12.1-32-release/lib   

    that looks like the problem. As you can see, the qmake is in a different folder than where it is looking. It should be looking in F:\Qt\5.12.1\msvc2017_32\lib, because I moved it to a different computer. Is there anyway to have it so Qt isn't looking in a hardcoded path, but rather relative (which was how I thought it always worked).

  • Lifetime Qt Champion

    I meant running qmake from your custom Qt build.

  • @SGaist yeah, sorry the path looked weird, I moved it around. That is my custom Qt build qmake.

  • Lifetime Qt Champion

    And there's your problem, you can't just move your Qt installation around like that. There are paths hard coded in qmake. IIRC there's a relocate tool but I don't remember its exact name.

  • Yup, that's it. Turns out I can add a qt.conf file "next" to the qmake.exe with the following in it:

    Prefix = f:/5.12.1-32-release

    And now I get:

    F:\5.12.1-32-release\bin>qmake --version              
    QMake version 3.1                                     
    Using Qt version 5.12.1 in f:/5.12.1-32-release/lib   

    And Qt Creator is very happy.

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