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

From: Ken Brown <[email-masked]>
Date: Sat, 08 Sep 2012 13:20:00 -0400

On 9/8/2012 11:58 AM, Eli Zaretskii wrote:
>> Date: Sat, 08 Sep 2012 08:31:21 -0700
>> From: Paul Eggert <[email-masked]>
>> CC: [email-masked]

>> 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