feat: add Windows ARM64 (Snapdragon X Elite) native build support#422

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abehrman wants to merge 13 commits into

Snapmaker:mainfrom

abehrman:feat/windows-arm64

Commits on Jun 3, 2026

feat: add Windows ARM64 (Snapdragon X Elite) build support

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fix(ci): use MSYS2 gendef+dlltool for GMP/MPFR ARM64 import libs

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fix(ci): replace gendef with objdump -p for GMP/MPFR export parsing

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fix(ci): use llvm-readobj + llvm-dlltool for GMP/MPFR import libs

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fix(ci): explicitly install mingw-w64-clang-aarch64-llvm for LLVM tools

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fix(ci): handle libmpfr-6.dll soname from MSYS2 CLANGARM64

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fix(cmake): pass CMAKE_POLICY_VERSION_MINIMUM=3.5 to all ExternalProject builds

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fix(deps/OpenEXR): disable SSE2/SSSE3 on Windows ARM64

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fix(deps/OpenEXR): use CMAKE_CACHE_ARGS with FORCE to disable SSE on ARM64

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fix(deps/OpenEXR): patch cmake files directly to force SSE off on ARM64

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fix(ci): pin CMake to 3.31.x on Windows ARM64 runner

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fix(deps): real ARM64 fixes for Boost.Context and OpenEXR SSE

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fix(deps/Boost): use winfib context impl on ARM64 instead of excluding it

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