Segmentation fault for 5.1.0 on Debian
Matthew Moyle-Croft
mmc at mmc.com.au
Sat Oct 28 17:12:39 UTC 2017
Wonder if we should suggest that the GCC team use RtConfig as part of their test suite for compilers? Over the years I seem to recall it’s triggered quite a few issues.
MMC
> On 27 Oct 2017, at 7:21 pm, Mark Prior <mrp at mrp.net> wrote:
>
> Thanks Nick. That does indeed stop the crashing of rtconfig.
>
> Mark.
>
> On 28/10/17 09:59, Nick Hilliard wrote:
>> Daryl Collins wrote:
>>> I forgot that I reinstalled my scratch VM since I last worked on
>>> irrtoolset. It does indeed seem to be an OS/library version thing etc.
>>>
>>> Booted my old VM (Ubuntu 14.04.5 LTS) and master works fine. New VM is
>>> running Ubuntu 17.04 and segfaults.
>>
>> this looks like a gcc6 compiler optimisation bug relating to the
>> -fno-tree-vrp flag. If you do something like this:
>>
>> % export CFLAGS="-O2 -fno-tree-vrp"
>> % ./configure
>> % make
>>
>> ... it should work fine.
>>
>> I've committed a (very ugly) workaround to master.
>>
>> Alternatively, you could compile with llvm:
>>
>> % export CXX clang++
>> % export CC clang
>> % ./configure
>> % make
>>
>> Nick
>>
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