[Distutils] Building Python extensions on 64-bit Windows using the SDK compilers

Nick Coghlan ncoghlan at gmail.com
Thu Sep 25 23:35:01 CEST 2014


On 26 Sep 2014 01:15, "David Cournapeau" <cournape at gmail.com> wrote:
>
>
>
> On Wed, Sep 24, 2014 at 7:49 PM, Paul Moore <p.f.moore at gmail.com> wrote:
>>
>> On 24 September 2014 17:24, Chris Barker <chris.barker at noaa.gov> wrote:
>> > Thanks -- that would be great. But really, why is this so hard? Win64
is
>> > essentially One platform, and the freely available SDK is ONE compiler
>> > environment.
>>
>> If only that were true :-)
>>
>> What I've found is:
>>
>> 1. Different SDKs are needed for Python 2.7 and 3.3+ (the VS2008/VS2010
split)
>> 2. The v7.0 SDK (Python 2.7) is a bit of a beast to install correctly
>> - I managed to trash a VM by installing the x86 one when I should have
>> installed the x64 one.
>> 3. There are bugs in the SDK - the setenv script for v7.0 needs fixes
>> or it fails.
>>
>> Agreed, it should be easy. And indeed, it is if you have the full
>> Visual Studio. But when Python 2.7 came out, the freely available MS
>> tools were distinctly less convenient to use, and that shows.
>
>
> The SDK scripts are indeed a bit broken, but it is possible to detect
them automatically in a way that is similar to what was done for MSVC 2008.
>
> I know that for a fact because I ported the python distutils MSVC
detection to scons, and added support for the SDK there:
https://bitbucket.org/scons/scons/annotate/b43c04896075c3392818e07ce472e73cd6a9aca5/src/engine/SCons/Tool/MSCommon/sdk.py?at=default
(the code has changed since then).
>
> Is that the kind of thing that falls onto long term support for 2.7 ? If
so, I would be willing to work it out to put in distutils.

Yes, better handling of interoperability issues with the underlying
platform is in scope for 2.7 distutils - it effectively counts as a bug.

Cheers,
Nick.

> David
>
>>
>> It's getting a lot better, and once we start using MSVC 2012 or later
>> (i.e., Python 3.5+), the express editions include 64-bit support out
>> of the box, which makes most of the problems go away.
>>
>> Paul
>> _______________________________________________
>> Distutils-SIG maillist  -  Distutils-SIG at python.org
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>
>
>
> _______________________________________________
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