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Date: Mon, 27 Jun 2005 09:43:19 +0200
From: Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To: newlib AT sources DOT redhat DOT com
Cc: cygwin AT cygwin DOT com
Subject: Re: HUGE is missing in math.h
Message-ID: <20050627074319.GA383@calimero.vinschen.de>
Reply-To: newlib AT sources DOT redhat DOT com
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On Jun 26 09:37, Humberto Bortolossi wrote:
> Hi!
> 
> I'm trying to port a C program written originally in
> Linux to the Microsoft Windows plataform.
> 
> I've realized that math.h under cygwin doesn't
> define the macro HUGE, that is defined in
> the math.h under linux:
> 
> /* Declarations for math functions.
>    Copyright (C) 1991-1993,1995-1999,2001,2002 Free Software Foundation, Inc.
>    This file is part of the GNU C Library.
>  */
> /* SVID mode specifies returning this large value instead of infinity.  */
> # define HUGE           3.40282347e+38F
> 
> I thought math.h should be quite portable ...

HUGE is not portable.  It's not defined in the standard, see
http://www.opengroup.org/onlinepubs/009695399/basedefs/math.h.html
Use HUGE_VAL instead. 

However, other definitions are missing in math.h, like HUGE_VALF,
HUGE_VALL, INFINITY and NAN.

Since math.h is part of newlib, I've redirect this posting to the
newlib mailing list.


Corinna

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Project Co-Leader          mailto:cygwin AT cygwin DOT com
Red Hat, Inc.

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