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:-1: error: Project ERROR: Unknown module(s) in QT: qml

  • Okay, some details first: Qt 6.2.2, on Fedora 35.

    So, obvious question: how can I get hold of the QtQml module (and, to be fair, the rest of the QML modules)? I've tried the Maintenance Tool, and it seems to think they're there already.

  • Can you post the installation tree of your maintenance tool?

  • Lifetime Qt Champion

    Hi and welcome to devnet,

    Some more details are required:

    • type of project: qmake or cmake ?
    • how did you create the project ?

  • @SGaist

    1: From what I can tell, qmake. (I just pressed the "Build" button, but this pops up when I modify the .pro file, before I try to build it.)
    2: Not sure what you mean by this question; I've been using Qt Creator to write my project.

  • Lifetime Qt Champion

    Can you show the content of your .pro file ?

  • @SGaist, this is what it looks like. You'll note the line causing the error is in Line 1.

    QT       += core gui network qml
    greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
    CONFIG += c++11
    # You can make your code fail to compile if it uses deprecated APIs.
    # In order to do so, uncomment the following line.
    #DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
    SOURCES += \
        main.cpp \
        qircbot.cpp \
    HEADERS += \
        qircbot.h \
    # Default rules for deployment.
    qnx: target.path = /tmp/$${TARGET}/bin
    else: unix:!android: target.path = /opt/$${TARGET}/bin
    !isEmpty(target.path): INSTALLS += target

    (As I'm sure you can tell at this point, the project in question is an IRC bot. I am not asking for advice on how to write it; this is a project that is being rebuilt from the ground up, so I've done this before, in this manner before.)

  • @Leway-Previs-0
    run clean project, then qmake and rebuild

  • @aliks-os I have just done that. On Clean, it brought up that it couldn't find the QML module. Ran QMake, it showed the error in the thread title.

    Now, I apologise if I sound like a jerk from this point onwards. As I stated in my original post, it cannot find the files required; it actually seems like they do not exist in my install. (And before anyone asks, yes, I looked.) What I want to know is, where can I find the files required for these modules, and what needs to be located where? That is all I needed to know.

  • Lifetime Qt Champion

    How did you install Qt ?
    I would have guessed using the online installer in which case you should not be missing these files.

  • @SGaist I did, yes.

    Where would they be located normally? I'm certain I have not missed them, but y'know, best to double check. (I'm on a Linux system, if that helps.)

  • Lifetime Qt Champion

    @Leway-Previs-0 Maybe you also installed Qt packaged by your Linux distribution and are now using that one?
    Make sure you use qmake from the Qt installation you want to use.

  • @jsulm That crossed my mind also, so I did a full uninstall, then reinstalled from the Qt installer. Didn't change.

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