[Distutils] Should abi3 tag be usable on Windows?

[Cosimo Lupo]

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 <cosimo at 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 <cosimo at 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*
>> <https://github.com/hynek/argon2_cffi/pull/32#issuecomment-355771832>
>> 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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