[issue20160] broken ctypes calling convention on MSVC / 64-bit Windows (large structs)

[Steve Dower]

Steve Dower added the comment:

Had a look at where libffi is at, and we're such a long way from them now that I don't think we can easily merge (a.k.a. I don't want to be the one to do it :) )

I want to run this patch through some builds with the right compilers, but then I'll check it in.

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assignee:  -> steve.dower
versions: +Python 3.5 -Python 3.3

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