[OE-core] Feedback on building openembedded-core for qemuarm. Excerpts from buildlog

[Ulf Samuelsson]

On 2011-12-07 23:51, Khem Raj wrote:
> On (04/12/11 11:35), Richard Purdie wrote:
>> On Sun, 2011-12-04 at 12:20 +0100, Henning Heinold wrote:
>>> On Sat, Dec 03, 2011 at 09:03:46PM +0100, Ulf Samuelsson wrote:
>>>> Have made some further tests with the same machine, but now running
>>>> Ubuntu 11.04 x64
>>>>
>>>> bitbake console-image
>>>>
>>>>      PARALLEL_TASKS        BB_NUMBER_TASKS        BUILD TIME
>>>>      2                                  2
>>>> 1:24:16
>>>>      4                                  4
>>>> 0:48:22
>>>>      6                                  6
>>>> 0:45:00
>>>>      24                                24
>>>> C++ compiler fails with --sysroot problem
>>>>          after ~2200 out of 2400 tasks.
>>>>
>>>>
>>>>
>>>> BR
>>>> Ulf
>>> Hi Ulf,
>>>
>>> can you try the attached patch if it solves the problem?
> Does this really fix the problem.

It  apparently fixes the symptoms at least (but I didn't do many tests.
On the other hand, the performance improvement seems minimal
once your past 6-8, even on a hexa core machine.

>> Can someone please explain to me how this would fix the problem?
>>
>> If this were the issue shouldn't it either always work or always fail?
>>
>> I'm worried that even if this does "fix" the problem, there is a deeper
>> issue lurking somewhere :(
> We use --with-local-prefix and then also --with-gxx-include-dir which
> points to /usr/include/c++
>
> Now the documentation says that --with-gxx-include-dir is an absolute
> path but if sysroot gets prepended to it or not I am not clear yet
> if sysroot gets prepended to it then we should be in safe spot
>
>
>> Cheers,
>>
>> Richard
>>
>>
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-- 
Best Regards
Ulf Samuelsson
eMagii