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Date: Mon, 10 Feb 1997 17:43:35 -0800 (PST)
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From: Mark Diekhans <markd@Grizzly.COM>
To: gurney_j@resnet.uoregon.edu
CC: mcclure@cs.unm.edu, freebsd-gnats-submit@freefall.freebsd.org,
        freebsd-current@freebsd.org
In-reply-to: <Pine.BSF.3.95q.970210123332.24299F-100000@hydrogen.nike.efn.org>
	(message from John-Mark Gurney on Mon, 10 Feb 1997 12:45:50 -0800
	(PST))
Subject: Re: misc/229 floating point exception on illegial values..
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>I believe that this is what is suppose to happen...  you use SIGFPE to
>trap these errors and possibly rerun the function after correcting the
>problem....  acording to the math(3) man page an exception is suppose to
>occure on invalid values...
>
>so this is really a non-error correct?  and this pr should be closed...
>
>i.e. acos(-2.0) is suppose to generate a SIGFPE else it isn't doing what
>math(3) says it will do...

As the default behavior, this causes a great amount of pain when porting
software to BSD.  No other system that I know of works in this manner.
Its a royal pain for things like Tcl and other interpreters that want to
check errno after calling a math function.

Mark