There is a solution to that problem on the linked issue. Basically, you need to declare Py_LIMITED_API in your code or as an extra preprocessor variable.
Windows doesn’t use a filename suffix for python3.dll linked extensions as it will be handled at load time. The tag for the wheel is outside of my area, so hopefully someone can chime in on that for you. Cheers, Steve Top-posted from my Windows phone From: Cosimo Lupo Sent: Monday, January 8, 2018 10:32 To: distutils-sig@python.org Subject: Re: [Distutils] Should abi3 tag be usable on Windows? It turns out setuptools is still linking to PYTHON36.DLL instead of PYTHNO3.DLL even when py_limited_api=True https://github.com/pypa/setuptools/issues/1248 This is a different, though somewhat related, problem from the one concering wheel/pip pep425tags disallowing `abi3` tag on Windows. On Sun, Jan 7, 2018 at 12:39 PM Cosimo Lupo <cos...@anthrotype.com> wrote: I jut found this related pip issue: https://github.com/pypa/pip/issues/4445 (I myself as @anthrotype commented on that thread back in April last year but then completely forgot...) After re-reading it now, it's still not clear to me what the resolution on that issue was. On Sun, Jan 7, 2018 at 10:12 AM Cosimo Lupo <cos...@anthrotype.com> wrote: Hello, CFFI has recently added support for Py_LIMITED_API extension modules built for CPython 3. The wheel module since version 0.30.0 also supports passing —py-limited-api cp3X to bdist_wheel command to allow the generated .whl to be installed on all CPython versions equal or greater than the one specified. Yesterday I was trying to apply this on a cffi-built extension module, and it worked for Linux and macOS but failed for Windows: https://github.com/hynek/argon2_cffi/pull/32 The AssertionError from wheel.pep425tags complains that a tag with abi3 would be unsupported for the target platform. Alex Gronholm commented > imp.get_suffixes() does not seem to contain any ABI3 suffixes, but I'm not > sure if this is even applicable on Windows. Incidentally, I noticed one specific package, PyQt5, that distributes both abi3-tagged wheels for Mac and manylinux and Windows wheels for a range of cp35.cp36.cp37 but with abi tag set as “none”, and they do seem to work. So, can one make such py_limited_api wheels work on Windows with the current state of the tooling, and if so how? Thank you in advance Cosimo Lupo -- Cosimo Lupo -- Cosimo Lupo
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