[OE-core] Weird ALTERNATIVES and staging conflict.

[Mike Looijmans]

On 11/03/2014 11:04 AM, Richard Purdie wrote:
> On Mon, 2014-11-03 at 10:53 +0100, Mike Looijmans wrote:
>> On 10/30/2014 06:47 PM, Richard Purdie wrote:
>>> On Thu, 2014-10-30 at 15:17 +0100, Mike Looijmans wrote:
>>>> I have this base script that builds FPGA bitstreams:
>>>>
>>>> https://github.com/topic-embedded-products/meta-topic/blob/master/recipes-bsp/fpga/fpga-image.inc
>>>>
>>>> Now you can have multiple recipes using it, and as such, it seemed a good idea
>>>> to add these lines to that recipe:
>>>>
>>>> +ALTERNATIVE_${PN} = "fpga.bin bitstreams"
>>>> +ALTERNATIVE_LINK_NAME[fpga.bin] = "${datadir}/fpga.bin"
>>>> +ALTERNATIVE_TARGET[fpga.bin] = "${datadir}/fpga.bin"
>>>> +ALTERNATIVE_LINK_NAME[bitstreams] = "${datadir}/bitstreams"
>>>> +ALTERNATIVE_TARGET[bitstreams] = "${datadir}/bitstreams"
>>>>
>>>>
>>>> This still resulted in staging conflicts.
>>>
>>> This isn't surprising since update-alternatives only works for target
>>> systems. It is not designed for operating on the sysroot.
>>
>> I don't want these files in sysroot, I want them on target only.
>
> Ok, that makes things much easier.
>
>>>> But looking at the contents of the fake packages, the fpga.bin has been
>>>> renamed by alternatives (as expected), and the symlink will be created after
>>>> installing, so how come I still get this?
>>>
>>> The "staging" code uses the output of do_install directly and does
>>> different things to the packaging code path. We've never had someone
>>> with this problem before. Binaries in *bindir only get installed into
>>> the sysroot in the -native case.
>>>
>>> I appreciate that tells you why it doesn't work and not how to fix it
>>> but hopefully that helps a bit.
>>
>> If I understand you correctly, the problem is that the recipe is trying to
>> install things in sysroot?
>
> Correct, by default ${datadir} is staged. The easiest way to handle this
> may be to define your own sysroot_stage_all function (or
> sysroot_stage_dirs) which just stages what you need, if anything.

In other words, make  sysroot_stage_all into a no-op?

I've been looking at the staging.bbclass, but that's basically the best I can 
come up with.

M.


Met vriendelijke groet / kind regards,

Mike Looijmans
System Expert


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