On May 4, 2006, at 9:46 PM, Yukihiro Matsumoto wrote:

> Hi,
>
> In message "Re: What do you say to log2 to Math module?"
>     on Fri, 5 May 2006 09:34:44 +0900, Tanaka Akira <akr / m17n.org>  
> writes:
>
> |I guess it is easy to persuade matz because log2 is defined
> |by C99 and POSIX.
>
> Right.  And I did it last night.  Although gcc gives me warning
> "incompatible implicit declaration of built-in function 'log2'" unless
> I specify -std=c99.
>
> 							matz.
>

Off on a tangent here, but is -std=c99 ok with ruby's K&R style C?