Re: [PATCH A or B] Fix for bug #853 - matchbox-panel segfaults, X becomes unusable

[Darren Hart <dvhart@linux.intel.com>]

On 03/16/2011 05:15 PM, Stewart, David C wrote:
> Great job finding this, Darren!

Thanks, but credit also goes to Ke who confirmed that this was the issue 
after I dismissed it because my build didn't reflect the change! Go Team.

:)

--
Darren

>
>> -----Original Message-----
>> From: poky-bounces@yoctoproject.org [mailto:poky-
>> bounces@yoctoproject.org] On Behalf Of Richard Purdie
>> Sent: Wednesday, March 16, 2011 5:14 PM
>> To: Darren Hart
>> Cc: poky@yoctoproject.org
>> Subject: Re: [poky] [PATCH A or B] Fix for bug #853 - matchbox-panel
>> segfaults, X becomes unusable
>>
>> On Wed, 2011-03-16 at 14:47 -0700, Darren Hart wrote:
>>> The root cause of the matchbox-panel segfault is the same as for the
>>> previous two bugs addressing the same issue:
>>>
>>> o Bug 224 - [Netbook/emenlow] matchbox-panel segfault after X startup
>>> o Bug 738 - matchbox-panel segfault after X startup
>>>
>>> There apparently is a bug in gcc which results in the omission of some
>>> code leading to the segfault on core2. The following flags resolve the
>>> problem.
>>>
>>> FULL_OPTIMIZATION = "-fexpensive-optimizations -frename-registers -O2
>>> -ggdb -feliminate-unused-debug-types"
>>>
>>> We can continue to patch each new machine's gtk+ recipe that is based
>> on
>>> atom-pc.conf, or we can just add the above to tune-atom.conf. I've
>>> tested both on both the n450 and a Toshiba NB305 netbook, and each
>>> solution is effective.
>>>
>>> Chaging it in tune-atom.conf likely fixes other bugs we either haven't
>>> solved yet or simply haven't hit. It is also much more invasive, and
>> we
>>> may not be willing to accept that this close to 1.0. The patches
>> follow,
>>> and we can include one or the other.
>>>
>>> Preferences?
>>
>> I'm in favour of C which is to add this to tune-atom.inc:
>>
>> FULL_OPTIMIZATION_pn-gtk+ = "-fexpensive-optimizations -frename-
>> registers -O2 -ggdb -feliminate-unused-debug-types"
>>
>> :)
>>
>> Cheers,
>>
>> Richard
>>
>>
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>> poky@yoctoproject.org
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-- 
Darren Hart
Intel Open Source Technology Center
Yocto Project - Linux Kernel