[New-bugs-announce] [issue34219] distutils: build_ext -D wrongly assume defining a symbol with no value

[monson]

New submission from monson <holymonson at gmail.com>:

`python setup.py build_ext -D zero,one=v1,two=k2=v2` will generate preprocessor argument `-D zero=1 -D one=v1=1 -D two=k2=v2=1`.
Expect `-D zero=1 -D one=v1 -D two=k2=v2`.

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components: Library (Lib)
messages: 322344
nosy: monson
priority: normal
severity: normal
status: open
title: distutils: build_ext -D wrongly assume defining a symbol with no value
type: behavior
versions: Python 3.7

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue34219>
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