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Re: [avr-libc-dev] selective linking of floating point support for *prin

From: Eric Blake
Subject: Re: [avr-libc-dev] selective linking of floating point support for *printf / *scanf
Date: Fri, 29 Aug 2014 07:20:40 -0600
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.7.0

On 08/29/2014 12:04 AM, Thomas Preud'homme wrote:

>> So are you saying you are stuck with printf_float?
> It's not printf_float but _printf_float. I was told double underscore is only
> necessary with old toolchain as they might add a leading underscore. So
> _printf_float should not pose any kind of problem.

Yes, it does.  The namespace reserved for the implementation is _[_A-Z].
 The namespace _[a-z] is still available for the user.  Which means the
user can declare their own _printf_float, and WE (as the implementation)
MUST NOT INTERFERE with it.  Since WE are the implementation, we should
use the namespace reserved for us, namely __printf_float.

Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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