[issue39599] ABI breakage between Python 3.7.4 and 3.7.5: change in PyGC_Head structure

[STINNER Victor]

STINNER Victor <vstinner at python.org> added the comment:

The PyObject structure is part of the stable ABI, but PyGC_Head is not.
https://www.python.org/dev/peps/pep-0384/#structures

I can understand that it's annoying to not be able to use the same wheel package on Python 3.7 <= 3.7.4 and Python Python 3.7 >= 3.7.5, but I don't think that we can fix this issue.

I suggest to close it as "rejected".

One solution is to require to build your C extension on installation (don't ship wheel packages).

If you want to ship wheel package, another compromise would be to require Python 3.7.5 or newer, and check early the Python version.

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