[Python-Dev] cpython (3.6): replace usage of Py_VA_COPY with the (C99) standard va_copy

[Thierry Chappuis]

Hello,

C99 has shown slow adoption by microsoft compilers on windows. On this 
platform, the support of va_copy() is recent and started with Visual Studio 
2013. Therefore, starting from Python 3.5, PY_VA_COPY can now be mapped 
directly to the native implementation of va_copy(). Hence, the proposed 
change might be justified.

Best wishes

Thierry

On Wed, Sep 21, 2016 at 12:42pm, Victor Stinner < victor.stinner at gmail.com 
[victor.stinner at gmail.com] > wrote:
I see that the old macro is now an alias to va_copy(). A similar change was 
done for Py_MEMCPY(). Would it make sense to put these old macros in a new 
backward_compat.h header, so maybe one day we can remove them? :-)

Maybe we need at least a comment mentionning when (python version) the 
macro became an alias.

Victor
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