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From: Julian Elischer <julian@ref.tfs.com>
Message-Id: <199511052247.OAA05467@ref.tfs.com>
Subject: Re: NPX still broken in 2.1.0-951104-SNAP...
To: bde@zeta.org.au (Bruce Evans)
Date: Sun, 5 Nov 1995 14:47:20 -0800 (PST)
Cc: freebsd-hackers@freebsd.org, markd@grizzly.com
In-Reply-To: <199511052144.IAA15439@godzilla.zeta.org.au> from "Bruce Evans" at Nov 6, 95 08:44:48 am
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but is it MORE broken than it is now to do this?
surely such a simple change that might help some people
is worth puting in now?


> 
> This still fails for more-portable software that sets errno to 0 before
> calling every math function and checks for errno being ERANGE or EDOM
> after the call (this is the only error reporting mechanism guaranteed
> in ANSI C).  You can fix this by changing CFLAGS in libc/msun/Makefile
> to the POSIX/ANSI setting recommended there (-D_POSIX_MODE), but then
> acos(2.0) will return a stupid value (0 instead of NaN).
> 
> Bruce
>