[issue42880] ctypes: variadic function call still doesn't work on Apple Silicon

[Ned Deily]

Ned Deily <nad at python.org> added the comment:

> Seems that we are getting the same libffi.dylib.

I suppose it is still possible that another libffi is being found first. To be absolutely sure, you could ask dyld to print the loaded libraries:

$ DYLD_PRINT_LIBRARIES=1 python3.9 test_main.py
[...]
dyld: loaded: <003A027D-9CE3-3794-A319-88495844662D> /usr/lib/system/libxpc.dylib
dyld: loaded: <7FBC5290-B2B3-3312-B69A-77378C539520> /Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/lib-dynload/_ctypes.cpython-39-darwin.so
dyld: loaded: <943473A5-A82B-3E21-8EB3-0BBDF5E605AA> /usr/lib/libffi.dylib
dyld: loaded: <58910956-4F2F-363A-80E5-D5E1C71DD83E> /Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/lib-dynload/_struct.cpython-39-darwin.so
dyld: loaded: <3444F392-DB43-3AEF-8596-2BFFBBD8EC0C> ./main.dylib
34

But, more importantly, the uname -a output for my M1 is:

Darwin ankl.local 20.2.0 Darwin Kernel Version 20.2.0: Wed Dec  2 20:40:21 PST 2020; root:xnu-7195.60.75~1/RELEASE_ARM64_T8101 x86_64

Perhaps you have not updated to macOS 11.1 yet?
 
By the way, in your original message's last example, is the output really "3"?

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