From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Tolpin <dvd@davidashen.net>
Message-Id: <200403051713.i25HDSt7060442@adat.davidashen.net>
To: 9fans@cse.psu.edu
Subject: Re: [9fans] Inf isInf, NaN, isNaN
In-Reply-To: <200403051447.i25Eljwo059910@adat.davidashen.net>
Content-Type: text/plain; charset=KOI8-R
Date: Fri,  5 Mar 2004 21:13:28 +0400
Topicbox-Message-UUID: 19dc4c88-eacd-11e9-9e20-41e7f4b1d025

> > ape predates c9x, which (i suspect) added those--i don't remember
> > them from the earlier standard--but that's really just a cue
> > for doug gwyn to contradict me.  i'd check myself, but
> > for some reason, my c book is always where i am not.
> >
>
> For me, the problem was not that isnan was not declared, but that
> isNaN was. 
>

That is, any chance Inf, isInf, NaN, isNaN can be locked out by
_POSIX_SOURCE or will it break something important enough?