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X-Authentication-Warning: hp2.xraylith.wisc.edu: khan owned process doing -bs
Date: Sun, 28 Jan 2001 21:46:09 -0600 (CST)
From: Mumit Khan <khan AT NanoTech DOT Wisc DOT EDU>
To: Gerald Jansen <gjansen AT uoguelph DOT ca>
cc: cygwin AT sources DOT redhat DOT com
Subject: Re: cygwin gcc 2.95-2 printf bug
In-Reply-To: <3A746ECA.80D1680E@uoguelph.ca>
Message-ID: <Pine.HPP.3.96.1010128213936.20620Y-100000@hp2.xraylith.wisc.edu>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII

On Sun, 28 Jan 2001, Gerald Jansen wrote:

> There is a bug printing near-zero floating point numbers in 2.95.2.
> 
> main() {
>   printf("[%5.2f] [%5.2f]\n",0.01,-0.01);
>   printf("[%5.2f] [%5.2f]\n",0.001,-0.001);
>   exit(0);
> }
> 
> Produces:
> [ 0.01] [-0.01]
> [ 0] [-0]

Thanks for reporting it. FYI, It's an issue with newlib (the library 
used in Cygwin), not with gcc.

Unfortunately, I don't have a solution for this ... it also happens
on other newlib supported targets, such as powerpc-eabi using newlib
1.9.0.

For future reference, please include complete code (eg., without the 
missing <stdio.h> include!), and also when you mention "correct result 
on other platforms", please be explicit as to what that correct result 
is. It may be obvious in this particular case, but you'd be amazed how 
many bug reports are never looked at due to ambiguous or insufficient 
information.

Regards,
Mumit



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