[issue11888] Add C99's log2() function to the math library

[STINNER Victor]

STINNER Victor <victor.stinner at haypocalc.com> added the comment:

> The main issue is that we'd have to provide (and maintain) our own
> implementation of log2 for Windows (and other OSs that don't have all
> the C99 support.  Solaris?)

No, we don't have to. Python has already a lot of optional functions, see for example the os module. We can provide log2() only if the C library has this function.

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nosy: +haypo

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