[issue23545] Turn on extra warnings on GCC

[Antti Haapala]

Antti Haapala added the comment:

I don't think adding -Wno-type-limits is a good idea.

The good question is how that can be happening, e.g. how PY_SSIZE_T_MAX divided by sizeof anything can be *more* than max(size_t)? E.g now that I stare at the code, *that* warning should be impossible if everything is correct. It means either that the RHS is negative or size_t is defined to be 32-bit in this compilation unit whereas PY_SSIZE_T is 64-bit. Neither sound like a good idea.

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nosy: +ztane

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<http://bugs.python.org/issue23545>
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