Cygwin is unsupported - close all open issues and list them here.

[iritkatriel]

BPO	45537
Nosy	@embray, @ZackerySpytz, @iritkatriel
PRs	bpo-28459: Fix _pyio on Cygwin where the msvcrt module is not built #14013 bpo-41374: Include netinet/tcp.h on Cygwin #21649 bpo-31882: Cygwin: fix/skip some tests to work around hang in asyncio/asyncore test suites #4149

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = <Date 2021-10-21.09:56:03.837>
created_at = <Date 2021-10-20.12:04:52.187>
labels = []
title = 'Cygwin is unsupported - close all open issues and list them here.'
updated_at = <Date 2021-10-21.09:56:03.837>
user = 'https://github.com/iritkatriel'

bugs.python.org fields:

activity = <Date 2021-10-21.09:56:03.837>
actor = 'iritkatriel'
assignee = 'none'
closed = True
closed_date = <Date 2021-10-21.09:56:03.837>
closer = 'iritkatriel'
components = []
creation = <Date 2021-10-20.12:04:52.187>
creator = 'iritkatriel'
dependencies = []
files = []
hgrepos = []
issue_num = 45537
keywords = ['patch']
message_count = 1.0
messages = ['404437']
nosy_count = 3.0
nosy_names = ['erik.bray', 'ZackerySpytz', 'iritkatriel']
pr_nums = ['14013', '21649', '4149']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = None
url = 'https://bugs.python.org/issue45537'
versions = []

[iritkatriel]

There isn't currently a maintainer for cpython on Cygwin, which by PEP-11 means it is not supported.

There are open issues (some with patches) from aborted attempts to support it in the past. They will be closed as duplicates of this issue, so that they can be easily accessible in the future in case someone commits to support Cygwin.