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MacOS: skip bundled libffi on non-x86_64 #342

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MacOS: skip bundled libffi on non-x86_64 #342

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c45d712
allow using system ffi on macos
bjia56 Sep 27, 2023
3ae8684
typo
bjia56 Sep 27, 2023
53d5a76
restore x86_64 behavior
bjia56 Sep 27, 2023
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37 changes: 24 additions & 13 deletions cmake/extensions/CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -382,19 +382,30 @@ if(WIN32)
endif()
else()
if(APPLE)
add_python_extension(_ctypes
SOURCES ${ctypes_COMMON_SOURCES}
_ctypes/malloc_closure.c
_ctypes/darwin/dlfcn_simple.c
_ctypes/libffi_osx/ffi.c
_ctypes/libffi_osx/x86/darwin64.S
_ctypes/libffi_osx/x86/x86-darwin.S
_ctypes/libffi_osx/x86/x86-ffi_darwin.c
_ctypes/libffi_osx/x86/x86-ffi64.c
INCLUDEDIRS ${SRC_DIR}/Modules/_ctypes/libffi_osx/include
${SRC_DIR}/Modules/_ctypes/darwin
DEFINITIONS MACOSX
)
if(CMAKE_SYSTEM_PROCESSOR STREQUAL "x86_64" AND CMAKE_OSX_ARCHITECTURES STREQUAL "x86_64")
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@theartful theartful Sep 14, 2025 •
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I'm testing this PR, and trying to build python on an arm macos for x86_64, and then for arm64 (I made a wrong review that I deleted before, disregard it if you saw it).

I failed locally to build for x86_64 on an arm machine (ctypes didn't work), since I get CMAKE_SYSTEM_PROCESSOR = arm64, while CMAKE_OSX_ARCHITECTURES = x86_64.

I think it's better to check only for CMAKE_OSX_ARCHITECTURES

add_python_extension(_ctypes
SOURCES ${ctypes_COMMON_SOURCES}
_ctypes/malloc_closure.c
_ctypes/darwin/dlfcn_simple.c
_ctypes/libffi_osx/ffi.c
_ctypes/libffi_osx/x86/darwin64.S
_ctypes/libffi_osx/x86/x86-darwin.S
_ctypes/libffi_osx/x86/x86-ffi_darwin.c
_ctypes/libffi_osx/x86/x86-ffi64.c
INCLUDEDIRS ${SRC_DIR}/Modules/_ctypes/libffi_osx/include
${SRC_DIR}/Modules/_ctypes/darwin
DEFINITIONS MACOSX
)
else()
# non-x86_64 architectures, e.g. arm64 or arm64+x86_64 universal build
add_python_extension(_ctypes
REQUIRES LibFFI_INCLUDE_DIR LibFFI_LIBRARY
SOURCES ${ctypes_COMMON_SOURCES}
DEFINITIONS Py_BUILD_CORE_MODULE FFI_BUILDING
INCLUDEDIRS ${LibFFI_INCLUDE_DIR}
LIBRARIES ${LibFFI_LIBRARY}
)
endif()
else()
if("${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "x86_64")
set(_libffi_system_extra_src
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