bpo-41100: use system libffi for Mac OS 10.15 and up #21239
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This updates setup.py to default to the system libffi on Mac OS 10.15 and forward. It also updates detect_ctypes to prefer finding libffi in the Xcode SDK, rather than /usr/include Also, when the Mac OS libffi is used, it removes malloc_closure.c from the sourcs for _ctypes. libffi already comes with ffi_closure_alloc, and it is not compatible with the one in malloc_closure.c
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Do you know how far back libffi is included with macOS and part of the SDK? |
Looks like it goes back to at least 10.11, but 10.15 is the first one that has |
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superseded by #21249 |
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The vendored libffi sources do not support arm64 Mac OS. Recent versions of mac OS include libffi, including Mac OS 11 on arm64.
This updates setup.py to default to the system libffi on Mac OS 10.15 and forward. It also updates
detect_ctypes to prefer finding libffi in the Xcode SDK, rather than /usr/include
Also, when the Mac OS libffi is used, it removes malloc_closure.c from the sourcs for _ctypes.
libffi already comes with ffi_closure_alloc, and it is not compatible with the one in
malloc_closure.c
https://bugs.python.org/issue41100