GH-130478: Fixed HACL compilation failure on macOS Silicon#134177
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naizhao wants to merge 0 commit intopython:mainfrom
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GH-130478: Fixed HACL compilation failure on macOS Silicon#134177naizhao wants to merge 0 commit intopython:mainfrom
naizhao wants to merge 0 commit intopython:mainfrom
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picnixz
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May 18, 2025
configure.ac
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| # isn't great, so it's disabled on ARM64. | ||
| AC_MSG_CHECKING([for HACL* SIMD128 implementation]) | ||
| if test "$UNIVERSAL_ARCHS" == "universal2"; then | ||
| if [[ "$build_cpu" == "aarch64" && "$build_vendor" == "apple" ]]; then |
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Please keep the "UNIVERSAL_ARCHS" test as well and use test instead of [[ as it's more portable.
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Most changes to Python require a NEWS entry. Add one using the blurb_it web app or the blurb command-line tool. If this change has little impact on Python users, wait for a maintainer to apply the |
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Fix: Prevent HACL compilation failure on macOS Silicon when not building universal binaries (#130478)
Problem:
In Python 3.14.0b1, compiling on macOS Silicon without the
--enable-universalsdkflag resulted in a compilation error: "unknown type name 'Lib_IntVector_Intrinsics_vec256'". This occurred because the previous fix for a similar issue (#123748, #130366, #129043) in theconfigureandconfigure.acscripts relied on the$UNIVERSAL_ARCHSvariable for conditional checks. However,$UNIVERSAL_ARCHSis only set to "universal2" when--enable-universalsdkis explicitly provided. When this flag is absent (as is the case when only targeting the native arm64 architecture),$UNIVERSAL_ARCHSdefaults to "32-bit", causing the conditional logic to fail and the necessary definitions for HACL not to be included.Solution:
This PR modifies the
configureandconfigure.acscripts to use the$build_cpuand$build_vendorvariables instead of$UNIVERSAL_ARCHSfor determining the target architecture. This approach ensures that the necessary HACL definitions are included when building on macOS with an arm64 architecture, even when--enable-universalsdkis not specified.The PR provides a quick fix based on
$build_cpuand$build_vendor. While functional, this PR aims for a more robust and maintainable solution by directly checking for the "aarch64" architecture in$build_cpu.Testing:
This fix has been tested successfully on macOS Silicon (arm64) when building Python 3.14.0b1 without the
--enable-universalsdkflag. The compilation now completes without the "unknown type name 'Lib_IntVector_Intrinsics_vec256'" error.Related Issue: