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cqtdeployer Could not load the Qt platform plugin "xcb"

  • Hello, When I try to create an installer with cqtdeployer, I am unable to create a package that is able to run without installing any extra packages.

    I did "cqtdeployer -bin camera -qmake /home/username/Qt/5.15.0/gcc_64/bin/qmake qif"

    When trying to run on a computer that does not have any qt packages installed I get an error of:

    qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "/home/username/Downloads/tets/camera/plugins/platforms:" even though it was found.
    This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.

    Available platform plugins are: eglfs, linuxfb, minimal, minimalegl, offscreen, wayland-egl, wayland, wayland-xcomposite-egl, wayland-xcomposite-glx, xcb.

    Aborted (core dumped)

    If i installed: sudo apt-get install libxcb-xinerama0 than my program will run without any errors.
    My question is how do I create the package with the "xcb" plugin included already so I wouldnt have to install it on another computer when running the executable.

  • @rtvideo
    This has been asked before, and is problematic.

    To satisfy your requirement you would have to do something about packaging whatever gets fetched by sudo apt-get install libxcb-xinerama0. And that varies by, say, OS distro, plus anything you did package would get out of date over time/upgrade of existing OS. So how do you propose to bundle an always-valid-and-up-to-date libxcb-xinerama0 with your app?

  • @JonB Yes exactly, and I am not sure how I would do it exactly that is why I made the post and see if anyone knew a way that had been done.

  • @rtvideo
    I don't see how it can be done, cross-platform and kept up-to-date.

    The "correct"/best way is to run e.g. sudo apt-get install libxcb-xinerama0 on the target system, if necessary.

    Perhaps you should consider who your targets are and what is required to satisfy them.

    I will leave to others now to comment otherwise.

  • Lifetime Qt Champion

    @rtvideo said in cqtdeployer Could not load the Qt platform plugin "xcb":

    My question is how do I create the package with the "xcb" plugin included already

    As @JonB said: this is hardly doable as Linux distributions are too different. What you could do is to provide something like of your application to include all dependencies of your app in one package.

  • Hello
    This is a bug in the cqtdeployer tool. Fixed now.
    Just update your cqtdeployer to version 1.4.7

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