[issue22981] Use CFLAGS when extracting multiarch

[Martin Panter]

Martin Panter added the comment:

Why do you set CFLAGS=-m32? When I cross-compile a 32-bit Python on a 64-bit host, I set CC="gcc -m32" instead. (Otherwise, I would have to specify LDFLAGS="-m32" as well.)

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components: +Build
nosy: +martin.panter

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<http://bugs.python.org/issue22981>
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