From bug-request at octave dot org Sat Dec 18 09:04:31 2004
Subject: Re: signbit on linux/gcc 3.2+
From: "John W. Eaton" <jwe at bevo dot che dot wisc dot edu>
To: Orion Poplawski <orion at cora dot nwra dot com>
Cc: bug at octave dot org
Date: Sat, 18 Dec 2004 10:06:26 -0500

On 17-Dec-2004, Orion Poplawski <orion at cora dot nwra dot com> wrote:

| Enabling C99 mode sounds good to me.  I define _GNU_SOURCE in my builds 
| which has the same effect on the headers.

OK, I wasn't sure how best to do this, but now I see that there is an
AC_GNU_SOURCE macro for autoconf that can be used near the top of the
configure script and that will ensure that _GNU_SOURCE is defined when
running the tests, so I've added that.  If it causes trouble, we can
remove it later.

| _ISOC99_SOURCE might be more 
| portable.  Don't know if you want to mess with using c99 or "gcc 
| -std=c99" or the like because of problems finding compilers on different 
| platforms.

Right, I don't think we want to try this route, because it means we
have to know too much about the switches accepted by various
compilers.

Thanks,

jwe



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