[ITK] [ITK-dev] Ubuntu 14 Test failure bisect results

[Matt McCormick]

Hi Brad,

I have been doing some Experimental builds on the dashboard.  So far,
the test failures are repeatable with GCC / Binutils in Ubuntu 14.04
with BUILD_SHARED_LIBS OFF, but not BUILD_SHARED_LIBS ON.  I am
working on a patch... :-)

Thanks,
Matt

On Thu, Aug 6, 2015 at 9:33 AM, Bradley Lowekamp <blowekamp at mail.nih.gov> wrote:
> Matt,
>
> What were the results of this experiment? It'd be nice to clean up the release branch of these failing tests.
>
> And I want to steal the correct solution for SimpleITK too :)
>
> Brad
>
> On Jul 31, 2015, at 3:29 PM, Matt McCormick <matt.mccormick at kitware.com> wrote:
>
>> Hi Brad,
>>
>> Thanks for investigating and getting great information out of git bisect.
>>
>> I developed the patch on Gentoo with GCC 4.8.4 / binutils 2.24, and I
>> have not seen any issues.  The eldorado builds on the dashboard are
>> all Ubuntu 14.04.2, too.  I will start an Experimental build with
>> BUILD_SHARED_LIBS set on eldorado to be sure it can be reproduced.
>>
>> Thanks,
>> Matt
>>
>> On Fri, Jul 31, 2015 at 1:03 PM, Bradley Lowekamp
>> <blowekamp at mail.nih.gov> wrote:
>>> Matt,
>>>
>>> I was digging into these test failures:
>>>
>>> https://open.cdash.org/viewTest.php?onlyfailed&buildid=3932451
>>>
>>> Here are the results of the git bisect:
>>>
>>> 674acdb2dd5546b7045f7253c84e4f9f237405e8 is the first bad commit
>>> commit 674acdb2dd5546b7045f7253c84e4f9f237405e8
>>> Author: Matt McCormick <matt.mccormick at kitware.com>
>>> Date:   Sun May 31 21:00:55 2015 -0400
>>>
>>>    ENH: Use gold linker on Linux with GCC.
>>>
>>>
>>>
>>>    The gold linker is approximately three times as fast as the default
>>> linker.
>>>    Enable it with GCC 4.8 and newer where it was tested. The gold linker
>>> only
>>>    works with ELF executables, so it is only enabled for Linux.
>>>
>>>
>>>
>>>    Timing tests:
>>>
>>>
>>>
>>>    Static libs link time:
>>>
>>>
>>>
>>>      ld:      452 sec
>>>      ld-gold: 179 sec
>>>
>>>
>>>
>>>    Shared libs link time, wrapping enabled:
>>>
>>>
>>>
>>>      ld:      164 sec
>>>      ld-gold: 48 sec
>>>
>>>
>>>
>>>    Change-Id: Ic8d9b5132ad6b71e5f100b5436615d6a8fac3e5c
>>>
>>> Disabling ld-gold seems to fix the problem.
>>>
>>> Versions:
>>>
>>> blowekamp at lhcp-vm-ubu14:~/ITK$ gcc --version
>>> gcc (Ubuntu 4.8.4-2ubuntu1~14.04) 4.8.4
>>> Copyright (C) 2013 Free Software Foundation, Inc.
>>> This is free software; see the source for copying conditions.  There is NO
>>> warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
>>>
>>> blowekamp at lhcp-vm-ubu14:~/ITK$ ld --version
>>> GNU ld (GNU Binutils for Ubuntu) 2.24
>>> Copyright 2013 Free Software Foundation, Inc.
>>> This program is free software; you may redistribute it under the terms of
>>> the GNU General Public License version 3 or (at your option) a later
>>> version.
>>> This program has absolutely no warranty.
>>>
>>> blowekamp at lhcp-vm-ubu14:~/ITK$ lsb_release -a
>>> No LSB modules are available.
>>> Distributor ID: Ubuntu
>>> Description: Ubuntu 14.04.2 LTS
>>> Release: 14.04
>>> Codename: trusty
>>>
>>>
>>> Currently we have a check for using gold with > 4.8.3:
>>> https://github.com/InsightSoftwareConsortium/ITK/blob/master/CMake/ITKSetStandardCompilerFlags.cmake#L206
>>>
>>> But looking at this change:
>>> https://github.com/InsightSoftwareConsortium/ITK/commit/102c79bd3bb50cc649f2733c472bdfaa138c453e
>>>
>>> We should have know about these related test failures:
>>> https://github.com/InsightSoftwareConsortium/ITK/commit/102c79bd3bb50cc649f2733c472bdfaa138c453e
>>>
>>> So what do you recall about what versions of GCC ld-gold works on?
>>>
>>> Thanks,
>>> Brad
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>
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