[issue38304] PEP 587 implementation is not ABI forward compatible

[Nick Coghlan]

Nick Coghlan <ncoghlan at gmail.com> added the comment:

The hidden _config_version field wasn't in the accepted PEP.

Both it and struct_size should be removed, as we don't support updating an embedded Python runtime to a new X.Y.0 release without rebuilding the embedding application.

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nosy: +ncoghlan

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