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GH-156554: Update PY_SUPPORT_TIER according to PEP 11 #156576

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GH-156554: Update PY_SUPPORT_TIER according to PEP 11 #156576

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9bbfac9
Set PY_SUPPORT_TIER=2 for Windows ARM64 builds
chris-eibl Aug 29, 2026
afd320d
blurb it
chris-eibl Aug 29, 2026
aa17335
update configure
chris-eibl Aug 29, 2026
cd69d25
place aarch64-pc-windows-msvc/msvc after aarch64-*-linux-gnu/clang
chris-eibl Aug 29, 2026
2b66039
more fixes
chris-eibl Aug 29, 2026
a5d2677
update news entry
chris-eibl Aug 29, 2026
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3 changes: 3 additions & 0 deletions Misc/NEWS.d/next/Build/2026-08-29-15-14-45.gh-issue-156554.64SZb1.rst
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Original file line number Diff line number Diff line change
@@ -0,0 +1,3 @@
Update ``PY_SUPPORT_TIER`` according to :pep:`11` for these target triples:
``aarch64-*-linux-gnu/gcc``, ``aarch64-pc-windows-msvc/msvc``,
``x86_64-apple-darwin*/clang``, and ``powerpc64le-*-linux-gnu/gcc``.
4 changes: 2 additions & 2 deletions PC/pyconfig.h
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Expand Up @@ -152,7 +152,7 @@ WIN32 is still required for the locale module.
*
* win_amd64 MSVC (x86_64-pc-windows-msvc): 1
* win32 MSVC (i686-pc-windows-msvc): 1
* win_arm64 MSVC (aarch64-pc-windows-msvc): 3
* win_arm64 MSVC (aarch64-pc-windows-msvc): 2
* other archs and ICC: 0
*/
#ifdef MS_WIN64
Expand All @@ -170,7 +170,7 @@ WIN32 is still required for the locale module.
#define PYD_PLATFORM_TAG "win_amd64"
#elif defined(_M_ARM64)
#define _Py_COMPILER _Py_PASTE_VERSION("64 bit (ARM64)")
#define PY_SUPPORT_TIER 3
#define PY_SUPPORT_TIER 2
#define PYD_PLATFORM_TAG "win_arm64"
#else
#define _Py_COMPILER _Py_PASTE_VERSION("64 bit (Unknown)")
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16 changes: 8 additions & 8 deletions configure
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10 changes: 5 additions & 5 deletions configure.ac
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Expand Up @@ -1255,19 +1255,19 @@ dnl
AC_MSG_CHECKING([for PEP 11 support tier])
AS_CASE([$host/$ac_cv_cc_name],
[x86_64-*-linux-gnu/gcc], [PY_SUPPORT_TIER=1], dnl Linux on AMD64, any vendor, glibc, gcc
[x86_64-apple-darwin*/clang], [PY_SUPPORT_TIER=1], dnl macOS on Intel, any version
[aarch64-apple-darwin*/clang], [PY_SUPPORT_TIER=1], dnl macOS on M1, any version
[aarch64-*-linux-gnu/gcc], [PY_SUPPORT_TIER=1], dnl Linux ARM64, glibc, gcc
[i686-pc-windows-msvc/msvc], [PY_SUPPORT_TIER=1], dnl 32bit Windows on Intel, MSVC
[x86_64-pc-windows-msvc/msvc], [PY_SUPPORT_TIER=1], dnl 64bit Windows on AMD64, MSVC

[aarch64-*-linux-gnu/gcc], [PY_SUPPORT_TIER=2], dnl Linux ARM64, glibc, gcc+clang
[aarch64-*-linux-gnu/clang], [PY_SUPPORT_TIER=2],
[powerpc64le-*-linux-gnu/gcc], [PY_SUPPORT_TIER=2], dnl Linux on PPC64 little endian, glibc, gcc
[aarch64-*-linux-gnu/clang], [PY_SUPPORT_TIER=2], dnl Linux ARM64, glibc, clang
[aarch64-pc-windows-msvc/msvc], [PY_SUPPORT_TIER=2], dnl Windows ARM64, MSVC
[wasm32-unknown-wasip1/clang], [PY_SUPPORT_TIER=2], dnl WebAssembly System Interface preview1, clang
[x86_64-apple-darwin*/clang], [PY_SUPPORT_TIER=2], dnl macOS on Intel, any version
[x86_64-*-linux-gnu/clang], [PY_SUPPORT_TIER=2], dnl Linux on AMD64, any vendor, glibc, clang

[aarch64-pc-windows-msvc/msvc], [PY_SUPPORT_TIER=3], dnl Windows ARM64, MSVC
[armv7l-*-linux-gnueabihf/gcc], [PY_SUPPORT_TIER=3], dnl ARMv7 LE with hardware floats, any vendor, glibc, gcc
[powerpc64le-*-linux-gnu/gcc], [PY_SUPPORT_TIER=3], dnl Linux on PPC64 little endian, glibc, gcc
[powerpc64le-*-linux-gnu/clang], [PY_SUPPORT_TIER=3], dnl Linux on PPC64 little endian, glibc, clang
[riscv64-*-linux-gnu/gcc], [PY_SUPPORT_TIER=3], dnl Linux on RISC-V 64bit, glibc, gcc+clang
[riscv64-*-linux-gnu/clang], [PY_SUPPORT_TIER=3],
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