Date: Thu, 21 Jun 2001 10:57:08 +0300 (IDT)
From: Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
X-Sender: eliz AT is
To: djgpp AT delorie DOT com
Subject: Re: Mysterious NaNs...
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On Thu, 21 Jun 2001, Graaagh the Mighty wrote:

> On Tue, 19 Jun 2001 12:20:23 +0300 (IDT), Eli Zaretskii
> <eliz AT is DOT elta DOT co DOT il> sat on a tribble, which squeaked:
> 
> >Didn't you see that I said (above) ``link with -lm''?  Functions from 
> >libm.a re documented in a separate Info file.  Try "info libm", and you 
> >will find the docs of `isnan'.  (Assuming you have DJGPP v2.02 or later 
> >installed.)
> 
> Yeah, but libm was merged into libc ages ago.

No, it wasn't.  The ANSI-standard functions are present in both libc.a 
and libm.a, but each library has its own implementation of these 
functions.  Non-ANSI functions are only in libm.a, and `isnan' is one of 
them.