[Insight-developers] FloatingPointExceptions and failed tests in Mac

[Bill Lorensen]

Luis,

These may be related to the compiler using "old" fp instructions for
some math functions.
See for example:
http://www.mail-archive.com/core-libs-dev@openjdk.java.net/msg01325.html

If you run one of the failing tests with gdb it should pinpoint the problem.

It may be we can't fix it, but at least give it a shot,

Bill

On Sun, Dec 19, 2010 at 8:55 AM, Hans Johnson <hans-johnson at uiowa.edu> wrote:
> Luis,
>
> I don’t think there are special flags required.  There are flags that can
> change the behavior of how floating point exceptions behave, but these are
> usually things that simply ignore exceptions, or allow undefined behavior in
> order to get speed increases.
>
> My gut feeling is that we should spend a little more time verifying that the
> floating point report can not be made cleaner by fortifying the code (rather
> than changing what is reported).
>
> Kent is on vacation until after the first of the year, so perhaps we should
> dis-able this for the next 2 weeks and then take this back up in January.
>
> Hans
>
> Hans
> --
> Hans J. Johnson, Ph.D.
> Hans-johnson at uiowa.edu
>
> 278 GH
> The University of Iowa
> Iowa City, IA 52241
> (319) 353 8587
>
>
> ________________________________
> From: Luis Ibanez <luis.ibanez at kitware.com>
> Date: Sat, 18 Dec 2010 19:01:40 -0500
> To: Bill Lorensen <bill.lorensen at gmail.com>
> Cc: Hans Johnson <hans-johnson at uiowa.edu>, ITK <insight-developers at itk.org>,
> Kent Williams <norman-k-williams at uiowa.edu>
> Subject: Re: [Insight-developers] FloatingPointExceptions and failed tests
> in Mac
>
> Hi Bill,
>
> Yes, that's the flag that I have ON in thurmite.kitware.
>
> I may have misunderstood Hans, but I thought that
> he was implying that an additional set of compilation
> options will make this flag to work correctly in the mac.
>
> Currently this build is reporting
>
> 19 failing tests in Debug
> http://www.cdash.org/CDash/buildSummary.php?buildid=804592
>
> and
>
> 139 failing tests in Release:
> http://www.cdash.org/CDash/buildSummary.php?buildid=804592
>
>
>      Luis
>
>
> ----------------------
> On Fri, Dec 17, 2010 at 5:05 PM, Bill Lorensen <bill.lorensen at gmail.com>
> wrote:
>
> //Enable Floating Point Exceptions for Testing
> ITK_USE_FLOATINGPOINTEXCEPTIONS:BOOL=ON
>
>
> On Fri, Dec 17, 2010 at 5:04 PM, Luis Ibanez <luis.ibanez at kitware.com>
> wrote:
>> Hi Hans,
>>
>> What compilation options should I use in Mac in order
>> to get the floating point exceptions to work ?
>>
>> I'll add them to the ctest script for thurmite.kitware.
>>
>>
>>      Luis
>>
>>
>> --------------------------------------------
>> On Fri, Dec 17, 2010 at 11:15 AM, Hans Johnson <hans-johnson at uiowa.edu>
>> wrote:
>>>
>>> Luis,
>>>
>>> Let’s not rule out the possibility that a different set of floating point
>>> exceptions ARE Working on mac with the compile options.  So far the
>>> reported
>>> errors have identified real problems in ITK.
>>>
>>> Hans
>>>
>>>
>>>
>>> On 12/17/10 10:11 AM, "Luis Ibanez" <luis.ibanez at kitware.com> wrote:
>>>
>>>
>>> Kent, Hans, Brad,
>>>
>>> Looking closer at the tests that are failing in thurmite.kitware (a Mac
>>> mini):
>>>
>>> In Debug mode: 19 failing tests:
>>> http://www.cdash.org/CDash/viewTest.php?onlyfailed&buildid=803613
>>>
>>> and in Release mode, 139 failing tests:
>>> http://www.cdash.org/CDash/viewTest.php?onlyfailed&buildid=802532
>>>
>>>
>>> They turned out to be related to the fact that this build has ON the
>>> flag:
>>>
>>>                   ITK_USE_FLOATINGPOINTEXCEPTIONS
>>>
>>> When I turn the flag OFF, the build returns with only 6 tests failing:
>>> http://www.cdash.org/CDash/viewTest.php?onlyfailed&buildid=803142
>>>
>>>
>>> Are you aware of any reason why the floating point exceptions
>>> shouldn't  work in a Mac ?
>>>
>>> and if so, ...
>>> should we add some logic in the CMakeLists.txt file to
>>> hide this flag when configuring in macs ?
>>>
>>>
>>>
>>>      Thanks
>>>
>>>
>>>            Luis
>>>
>>>
>>>
>>
>>
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