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

[Roundup Robot]

Roundup Robot <devnull at devnull> added the comment:

New changeset 565f43f6bed4 by Victor Stinner in branch 'default':
Issue #11888: Use system log2() when available
http://hg.python.org/cpython/rev/565f43f6bed4

----------

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue11888>
_______________________________________