Re: (no subject)

On Fri, 8 Jun 2018, Scott Capps wrote:

> I am installing libpng using Intel compilers on a CentOS machine.  I can't
> get it to pass all of the tests.
>
> CentOS 7.xx Linux 64 Bit Operating System
> Xeon 5115 Scalable Cloud Ready Processor Cores / 2.4 GHz
>
> I have tried many latest versions including 1.6.34.  Attached is the
> test-suite.log.

These all seem to stem from a common cause.  Are you able to get in 
with a debugger and see what the cause of the floating point exception 
is?

Newer compilers have started to skip producing common-sense results 
(e.g. not issuing corresponding instructions) when encountering 
"undefined behavior" according to modern C standards.  This can result 
in a change in behavior.

It would be useful to see if reducing the compilation optimization 
level makes the problem go away.

Bob
-- 
Bob Friesenhahn
[email protected], http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/

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