bug#12381: Assume C89 or later for math functions.

[Ken Brown]

On 9/8/2012 11:58 AM, Eli Zaretskii wrote:
> > Date: Sat, 08 Sep 2012 08:31:21 -0700
> > From: Paul Eggert <eggert@cs.ucla.edu>
> > CC: 12381@debbugs.gnu.org

> > matherr was a problem back in the 1980s, but it's been obsolete for
> > decades.  Platforms that still provide it have it as an SVID option
> > that is disabled by default, because it was clearly a mistake.
>
> I'm not sure this is so universally correct.  E.g., what about Cygwin?
> Ken, can you tell?  AFAIR, Cygwin uses fdlibm, which used to invoke
> matherr by default.

Sorry, but this discussion is over my head.  Is there a C program I 
could run that would answer your question?

Ken