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  1. Qt Quality Assurance Infrastructure
  2. QTQAINFRA-3934

Investigate how to fix usage of Sccache for Windows Ninja Multi Config MSVC builds

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    • Windows

      As per https://codereview.qt-project.org/c/qt/qt5/+/232218/62/coin/platform_configs/cmake_platforms.yaml#25

      and
      https://github.com/mozilla/sccache/issues/242

      it appears sccache can't deal with MSVC debug builds that put the debug information into a separate pdb file.

      This prevents us from enabling Sccache for caching build artifacts for Windows.

      We should investigate if it's possible to fix ccache upstream, or there is some workaround we can use.

      One proposed workaround is to switch from /Zi to /Z7 to keep the debug info in object files, and then separate it out into pdb files, similar to how it's done for macOS / Linux with --separate-debug-info.

      Reference flags: https://docs.microsoft.com/en-us/cpp/build/reference/z7-zi-zi-debug-information-format?view=vs-2019

        For Gerrit Dashboard: QTQAINFRA-3934
        # Subject Branch Project Status CR V
        315813,11 CMake: Allow embedding debug info in object files with MSVC dev qt/qtbase Status: MERGED +2 0
        316153,7 CMake: Enable sccache for MSVC configs dev qt/qt5 Status: MERGED +2 0
        316168,7 WIP: Dummy change to force rebuilding and test sccache on MSVC dev qt/qtbase Status: ABANDONED -2 0

            alexandru.croitor Alexandru Croitor
            alexandru.croitor Alexandru Croitor
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