[issue12257] Rework/replace use of DISTUTILS_USE_SDK in packaging

[Éric Araujo]

Éric Araujo <merwok at netwok.org> added the comment:

Agreed.  Thanks for the insight.

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title: Use PYPACKAGING_USE_SDK envvar instead of DISTUTILS_USE_SDK -> Rework/replace use of DISTUTILS_USE_SDK in packaging

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue12257>
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