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  1. Qt
  2. QTBUG-125260

Support of ARM64EC ABI for Windows on ARM on Windows 11

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Details

    • Task
    • Resolution: Unresolved
    • P2: Important
    • None
    • 6.7.0, 6.8.0
    • QPA: Windows
    • None

    • Windows 11, MSVC 2022

    • Windows

    Description

      At the momement, only ARM64 platform is listed as supported on Windows on ARM. Microsoft promotes the use of ARM64EC (see https://blogs.windows.com/windowsdeveloper/2021/06/28/announcing-arm64ec-building-native-and-interoperable-apps-for-windows-11-on-arm/ and https://learn.microsoft.com/en-us/windows/arm/arm64ec ) as another ABI for Windows on ARM, on Windows 11 in particular, which provides better interoperability between x86_64 and ARM code.

      There meanwhile multiple attempts to get Qt running with ARM64EC and problem reports from different parties ranging from build problems to runtime issues. At the time of writing this, Qt 6.7.0 fails to run "configure" when ARM64EC is used.

      It should also be investigated if and how ARM64EC can be supported on Qt 6.8 which has its Feature Freeze very soon.

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        Issue Links

          relates to

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-113583 Problem when compiling a C++ project with MSVC 2019 with the target ABI ARM64EC for Windows 11 on ARM.

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Reported

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-119233 Problems when Building a Project for Windows that uses QtWebEngine for ARM64EC in Debug Mode

          • P5: Not important - Not relevant and not urgent.
          • Reported

          Bug - A problem which impairs or prevents the functions of the product. QTCREATORBUG-28729 QTCreator failed to build due to error MSB3073 on windows with MSVC Target ARM64EC

          • Not Evaluated - Not yet evaluated/prioritized
          • Closed
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              owolff Oliver Wolff
              vminenko Vladimir Minenko
              Vladimir Minenko Vladimir Minenko
              Alex Blasche Alex Blasche
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              Dates

                Created:
                Updated:

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