[issue28459] _pyio module broken on Cygwin / setmode not usable

[Erik Bray]

Erik Bray <erik.m.bray at gmail.com> added the comment:

Right, the current patch is really combining several issues.  I'll make  a PR from it that just fixes the _pyio issue.  I'll also open an issue for fixing the ctypes bug (this is a patch I've had in my cygwin branch for ages but just never got around to making a report for...)

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<https://bugs.python.org/issue28459>
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