[OE-core] Problem with RDEPENDS in multimachine builds for allarch packages

[Mike Looijmans]

On 27-10-15 09:36, Richard Purdie wrote:
> On Tue, 2015-10-27 at 09:30 +0100, Mike Looijmans wrote:
>> On 26-10-15 16:13, Sergey 'Jin' Bostandzhyan wrote:
>>> Hi,
>>>
>>> I recently ran into a problem that I described here:
>>> https://bugzilla.yoctoproject.org/show_bug.cgi?id=8578 and while debugging
>>> this issue an other problem came to light.
>>>
>>> I have a multimachine configuration (armv5/imx6) and the same distro for both
>>> of them (poky 2.0 RC based).
>>>
>>> I have some allarch packages which have no DEPENDS, however which have an
>>> RDEPENDS_${PN} setting.
>>>
>>> I can see that even though there were no changes to the recipe itself and
>>> also no changes to the recipes listed in RDEPENDS, my recipe still gets
>>> rebuilt each time.
>>>
>>> What we tried:
>>>
>>> <bluelightning> so cleansstate the recipe, change machine, cleansstate again,
>>>                   then build it, then change machine, build it again and note
>>>                   the first task that executes
>>>
>>> The logs for these steps, one with RDEPENDS and one without are at the end of
>>> this mail. I can see that with present RDEPENDS "real" tasks get executed
>>> even though no changes occured in the recipe; this is not the case when I
>>> drop RDEPENDS.
>>>
>>> Is this a bug or is this just something that needs to be documented?
>>
>> I think it's the same problem as described here:
>> http://thread.gmane.org/gmane.comp.handhelds.openembedded.core/70070/focus=70072
>>
>>> What is the "desired" behaviour?
>>
>> Apparently, this needless rebuilding is "desired".
>
> Its more that we can't tell the difference between a case where it is
> needless and a case where it is no. The system therefore rebuilds as if
> it didn't, there would be cases where it should have rebuilt and did
> not.

But that would not solve any issue at all.

Whatever package got built last will end up in the feed, under the "all" 
architecture. So if machine X and Y have different versions of some package P, 
and the build for Y ran last, machine X will still install Y's version of P.



Kind regards,

Mike Looijmans
System Expert

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