[New-bugs-announce] [issue34211] Cygwin build broken due to use of &PyType_Type in static declaration in _abc module

[Erik Bray]

New submission from Erik Bray <erik.m.bray at gmail.com>:

This is essentially the same as issue21124, but introduced more recently with the addition of the _abc_data_type in the _abc module.

The workaround is simply to use PyVarObject_HEAD_INIT(NULL, 0) instead of PyVarObject_HEAD_INIT(&PyType_Type, 0); PyType_Ready should take care of the rest.

P.S. I'm trying to get going again on the project of adding an AppVeyor build, and eventually a buildbot for Cygwin.  My previous attempt was doomed because I wanted to fix all failing tests on Cygwin *first*.  This time I am going for a more "instant gratification" approach of just skipping the tests that fail (for now) so that I can at least catch new regressions, and then gradually re-enabled skipped tests as I can find fixes for them.

However, for that to happen we at least need a minimal build to work.

----------
components: Build
keywords: 3.7regression
messages: 322315
nosy: erik.bray
priority: normal
severity: normal
stage: needs patch
status: open
title: Cygwin build broken due to use of &PyType_Type in static declaration in  _abc module
type: compile error
versions: Python 3.7, Python 3.8

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue34211>
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