Re: HUGE is missing in math.h

[Jeff Johnston <jjohnstn at redhat dot com>]

Corinna Vinschen wrote:
> 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.

I'll take a look at adding these unless you want to.  HUGE_VALL is the 
only one that is difficult.

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


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