setup.py: honor CMAKE_GENERATOR_PLATFORM for the Windows -A flag#592
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The Windows build hardcoded the Visual Studio target architecture to x64 for any 64-bit interpreter (`if sys.maxsize > 2**32: -A x64`). On win-arm64 the interpreter is 64-bit but the architecture is ARM, so this mis-targeted the build and find_package(Python) then failed. Honor an explicit CMAKE_GENERATOR_PLATFORM (e.g. "ARM64") from the environment, falling back to the previous behavior otherwise.
EZoni
approved these changes
Jul 6, 2026
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The Windows build hardcoded the Visual Studio target architecture to x64 for any 64-bit interpreter (
if sys.maxsize > 2**32: -A x64). On win-arm64 the interpreter is 64-bit but the architecture is ARM, so this mis-targeted the build and find_package(Python) then failed. Honor an explicit CMAKE_GENERATOR_PLATFORM (e.g. "ARM64") from the environment, falling back to the previous behavior otherwise.Same as openPMD/openPMD-api#1910