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Date: Mon, 11 Nov 2002 22:32:23 -0500
From: Christopher Faylor <cgf AT redhat DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: Printf routine incorrectly prints NaN for -Inf
Message-ID: <20021112033223.GA8423@redhat.com>
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References: <000301c289f9$428771f0$a82ace84 AT research DOT pc DOT ece DOT mcgill DOT ca>
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On Mon, Nov 11, 2002 at 10:11:57PM -0500, Peter Kabal wrote:
>gcc version 3.2 20020818 (prerelease)
>
>printf ("%g", log(0));
>
>This prints "NaN" instead of "-Inf" as it should (and did in the past).
>A check of the bit pattern returned shows that that log(0) returns a bit
>pattern corresponding to "-Inf", but printf prints "NaN" instead.
>
>I am not sure which C library is being used (a bug report to gcc folks
>got the response that newlib is the culprit). However, the compiler
>option -print-libgcc-file-name tells me it is looking for libgcc.a. So I
>am confused as to who to report the bug to.

Perhaps unsurprisingly, the gcc folks are correct.  It's a newlib bug.

The newlib mailing list is newlib at sources dot redhat dot com .

cgf

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