[issue32460] don't use tentative declarations

[Benjamin Peterson]

Benjamin Peterson <benjamin at python.org> added the comment:

If no definition provides an initializer, they'll end up initialized to 0. The legacy part is that you can have multiple tentative definitions of a symbol and most unix linkers will merge them.

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue32460>
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