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GeezerVison is showing github.com — Support building using "computed gotos" for clang-cl on Windows · Issue #131278 · python/cpython

Support building using "computed gotos" for clang-cl on Windows #131278

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Support building using "computed gotos" for clang-cl on Windows#131278
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OS-windowsbuildThe build process and cross-buildThe build process and cross-buildperformancePerformance or resource usagePerformance or resource usagetype-featureA feature request or enhancementA feature request or enhancement

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@chris-eibl
chris-eibl
opened on Mar 15, 2025
Issue body actions

Per suggestion from @zooba in #130040 (comment), don't be too fancy here:

  • just support a new optimizing build flag WITH_COMPUTED_GOTOS and keep build.bat out of the loop. It does not have to learn such flags. It already knows too many of them "which could just be passed through".
  • only test for != '' rather than a specific value.
  • no magic defaults - explicit is better than implicit. If it is there, it's enabled, else it's disabled.
  • but document like set WITH_COMPUTED_GOTOS=true
  • this would give us the possibility to opt out using WITH_COMPUTED_GOTOS=false, should we ever enable it by default (and the user does not like our guess)

Linked PRs

  • GH-131278: Support building using "computed gotos" for clang-cl on Windows #131279

Activity

  1. picnixz
    added
    type-featureA feature request or enhancementA feature request or enhancement
    performancePerformance or resource usagePerformance or resource usage
    OS-windows
    buildThe build process and cross-buildThe build process and cross-build
    on Mar 15, 2025
  2. zooba
    added a commit that references this issue on Mar 17, 2025

    GH-131278: Add option to build with computed gotos on Windows with cl…

    468a7aa
  3. zooba
    closed this as completedon Mar 17, 2025

  4. zooba commented on Mar 17, 2025

    @zooba
    zooba
    on Mar 17, 2025
    Member
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    Thanks!

  5. colesbury
    added a commit that references this issue on Mar 20, 2025

    pythonGH-131278: Add option to build with computed gotos on Windows w…

    ca39b4f
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    OS-windowsbuildThe build process and cross-buildThe build process and cross-buildperformancePerformance or resource usagePerformance or resource usagetype-featureA feature request or enhancementA feature request or enhancement

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