Qt build failing because of 'undefined references'.

[yourchandrashekhar]

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Hi People,
I'm trying to get my hands on with Github Actions and created a workflow to build a simple Qt based app on Windows and Qt Creator. In my local, I have a setup of Qt 5.11.3 and mingw53_32 working good. So I tried the same in the workflow. But, while building mingw -> g++ is not able to pick up libraries somehow and gives a lot of 'undefined reference' errors some of which I listed below. It also gives 'redeclared without dllimport attribute: previous dllimport ignored' warnings while compiling:

../../../Qt/5.11.3/mingw53_32/include/QtCore/qregexp.h:115:31: warning: 'uint qHash(const QRegExp&, uint)' redeclared without dllimport attribute: previous dllimport ignored [-Wattributes]
115 | friend Q_CORE_EXPORT uint qHash(const QRegExp &key, uint seed) Q_DECL_NOTHROW;
| ^~~~~

------------------------------------------

C:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/12.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: D:\a\OBJViewer\OBJViewer\OBJViewer\build/../main.cpp:22: undefined reference to __imp__ZN5QFile4openE6QFlagsIN9QIODevice12OpenModeFlagEE' C:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/12.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: D:\a\OBJViewer\OBJViewer\OBJViewer\build/../main.cpp:25: undefined reference to __imp__ZN11QTextStreamC1EP9QIODevice'
C:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/12.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: D:\a\OBJViewer\OBJViewer\OBJViewer\build/../main.cpp:28: undefined reference to `__imp__ZN11QTextStream8readLineEx'

The code is available publicly at https://github.com/yourchandrashekhar/OBJViewer
I have tried so many ways to overcome it, but nothing is working out.

Here is the workflow YML:

  name: Build ObjViewer Project

  on:
    push:
      branches:
        - main
    pull_request:
      branches:
        - main
    workflow_dispatch:
  
  jobs:
    build:
      runs-on: windows-latest
  
      steps:
      - name: Checkout repository
        uses: actions/checkout@v4
  
      - name: Install Qt
        uses: jurplel/install-qt-action@v4
        with:
          version: '5.11.3'
          host: 'windows'
          target: 'desktop'
          arch: 'win32_mingw53'
  
      - name: Configure project with qmake
        run: |
          cd ObjViewer
          mkdir build
          cd build
          qmake ../ObjViewer.pro -spec win32-g++ "CONFIG+=debug" "CONFIG+=qml_debug" 
  
      - name: Build project
        run: |
          echo "${{ env.QT_ROOT_DIR }}\\bin" >> $GITHUB_PATH
          cd ObjViewer/build
          mingw32-make debug
  
      #- name: Archive build artifacts
      #  uses: actions/upload-artifact@v4
      #  with:
      #    name: build-debug
      #    path: ObjViewer/build-debug/

Thanks in advance.

Chandra.

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