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  1. Qt
  2. QTBUG-94163

Applications only linking against static Qt Qml backing targets don't work

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: P2: Important
    • Resolution: Invalid
    • Affects Version/s: 6.2.0 Alpha
    • Fix Version/s: None
    • Labels:
      None
    • Environment:
      macOS

      Description

      1) Cherry-pick https://codereview.qt-project.org/c/qt/qtdeclarative/+/346273 to qtdeclarative
      2) Configure qtbase and qtdeclarative with -static or -DBUILD_SHARED_LIBS=OFF and build them
      3) export QML_IMPORT_TRACE=1
      4) Try to run qtbase/bin/qmleasing
      5) Observe that app launches but qml is not initialized

      QQmlImportDatabase::addImportPath: "/Volumes/T3/Dev/qt/qt5_cmake/builds/dev-mac-static/qtbase/qml"
      QQmlImportDatabase::addImportPath: "qrc:/qt-project.org/imports"
      QQmlImportDatabase::addImportPath: "/Volumes/T3/Dev/qt/qt5_cmake/builds/dev-mac-static/qtbase/bin"
      QQmlImports(qrc:/preview.qml)::addLibraryImport: "QtQuick" 2.0 as ""
      QQmlImports(qrc:/preview.qml)::importExtension: loaded ":/qt-project.org/imports/QtQuick/qmldir"
      QQmlImportDatabase::resolvePlugin: Could not resolve plugin "qtquick2plugin" in ":/qt-project.org/imports/QtQuick"
      qrc:/preview.qml:29:1: module "QtQuick" plugin "qtquick2plugin" not found
           import QtQuick 2.0
      

      Note that qmleasing target links directly to Qt::Qml and Qt::Quick, but does not run qmlimportscanner, does not have Q_IMPORT_PLUGIN(Quick) calls, and does not link against the optional plugins.

      Here's the relevant part of the link line to confirm that the libs are linked and the resources with the qmldir are linked.

      /Volumes/T3/Dev/qt/qt5_cmake/builds/dev-mac-static/qtbase/lib/libQt6Quick_debug.a
      src/qml/CMakeFiles/Qml_resources_1.dir/.rcc/qrc_qmake_QtQml.cpp.o
      src/quick/CMakeFiles/Quick_resources_1.dir/.rcc/qrc_qmake_QtQuick.cpp.o
      src/quick/CMakeFiles/Quick_resources_2.dir/.rcc/qrc_scenegraph_shaders.cpp.o
      

      generated qmldir contents

      module QtQuick
      optional plugin qtquick2plugin
      designersupported
      classname QtQuick2Plugin
      typeinfo plugins.qmltypes
      import QtQml auto
      prefer :/qt-project.org/imports/QtQuick/
      

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            Assignee:
            ulherman Ulf Hermann
            Reporter:
            alexandru.croitor Alexandru Croitor
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              Dates

              Created:
              Updated:
              Resolved:

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