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Re: log2
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From: |
Po Lu |
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Subject: |
Re: log2 |
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Date: |
Wed, 18 Jan 2023 21:11:44 +0800 |
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User-agent: |
Gnus/5.13 (Gnus v5.13) |
Eli Zaretskii <eliz@gnu.org> writes:
>> From: Po Lu <luangruo@yahoo.com>
>> Date: Wed, 18 Jan 2023 20:01:36 +0800
>>
>> commit 203ffc68468abaccfed7e8ee630d9aa143ce5dbf
>> Author: Paul Eggert <eggert@cs.ucla.edu>
>> Date: Tue May 10 14:44:35 2022 -0700
>>
>> Port libm configure-time test to Solaris 11.4
>>
>> * configure.ac (LIB_MATH): Check all the math.h functions
>> that Emacs uses, not just sqrt (Bug#55294).
>>
>> introduced a test for log2. But some versions of Android lack that
>> function, being one major operating system to not support all of the C99
>> math functions.
>>
>> Does Emacs actually use log2 anywhere?
>
> Emacs uses log2 in Flog.
I meant not conditioned under HAVE_LOG2, sorry.