Mark added the comment:

The problem is that I don't have the choice, the compiler we use for the 
project is VS13. Anyway, my colleagues are aware of this limitation but they 
could build their extensions all the same.

I set the variables as you recommended, and the obj files have been created. 
But the link fails with the following error:

LINK : fatal error LNK1181: impossible to open the input file 'ucrt.lib'

This library does not exist in my VS13 environment.

---- Message d'origine ----
De : Zachary Ware <rep...@bugs.python.org>
À : tib...@netcourrier.com
Objet : [issue27324] Error when building Python extension
Date : 15/06/2016 18:54:39 CEST

Zachary Ware added the comment:

Using the wrong compiler, you may wind up with an extension that appears to 
work, and you may never have a problem with it if conditions are just right. 
This article[1] looks like a pretty good explanation of why you don't want to 
do it, though (note: I've only skimmed the article).

If you really want to shoot yourself in the foot, you can try running 
vcvarsall.bat yourself, then make sure MSsdk is set (distutils doesn't care 
what it's set to, just that it's set), and set DISTUTILS_USE_SDK (again, 
doesn't matter to what).

Also, note that this problem should be a thing of the past with Python 3.5+ and 
VS2015+.

[1] http://siomsystems.com/mixing-visual-studio-versions/

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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue27324>
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<http://bugs.python.org/issue27324>
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