[New-bugs-announce] [issue41374] socket.TCP_* no longer available with cygwin 3.1.6+

[Christoph Reiter]

New submission from Christoph Reiter <reiter.christoph at gmail.com>:

The TCP macros are provided by netinet/tcp.h, which for some reason is skipped here: https://github.com/python/cpython/blob/592527f3ee59616eca2bd1da771f7c14cee808d5/Modules/socketmodule.h#L11

Until cygwin 3.1.6 these macros were also provided by sys/socket.h, but this got removed in https://cygwin.com/git/?p=newlib-cygwin.git;a=commit;h=e037192b505b4f233fca9a6deafc9797210f6693

This leads to socket.TCP_NODELAY for example not being available anymore.

git blame leads me to https://github.com/python/cpython/commit/b5daaed30d7c54ba1f516289f3a7a30a864133af introducing this special case, which isn't very helpful. I'd suggest to just remove the cygwin check and always include it (which works fine on my machine)

Downstream bug report for extra context: https://github.com/msys2/MSYS2-packages/issues/2050

----------
components: Build
messages: 374126
nosy: lazka
priority: normal
severity: normal
status: open
title: socket.TCP_* no longer available with cygwin 3.1.6+
type: compile error
versions: Python 3.8

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<https://bugs.python.org/issue41374>
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