From: Jari Oksanen <jari DOT oksanen AT helsinki DOT fi>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Spotting NaNs
Date: Thu, 23 Apr 1998 13:04:03 +0100
Organization: Univ Helsinki
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Paul Derbyshire wrote:
> 
> Paul Derbyshire wrote:
> >
> > Is there an ANSI/POSIX function for testing if a float or a double is a NaN?
> 
> Impatient, I wrote my own only to get a warning about an ambiguous overload,
> which pointed me to an isnan in math.h. Oddly, it seems someone forgot to
> document this thing in the info files. 

Nothing odd here: As far as I know, there are no info files for libm
functions. You must have been reading libc info files which are not the
same. Libc has only a part of libm functions, and even they are said to
be different variants.

Where are the info or man pages of math functions? In sources? 
-- 
Jari Oksanen -- Lahtis, Finland / Luokta, Suopma / Lahti, Häme.