[issue37916] distutils: allow overriding of the RANLIB command on macOS (darwin)

[Isuru Fernando]

Isuru Fernando <isuruf at gmail.com> added the comment:

This is an issue even without cross-compilations as there is an environment variable for the archiver and therefore the archiver and ranlib can be from 2 different toolchains and leads to error. Ran into this issue in python 3.8 on macOS with an lto build

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nosy: +isuruf

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue37916>
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