[yocto] Deleting layers in Hob

[Barros Pena, Belen]

Hi all,

Do we have enough information to make a decision about the meta-yocto
layer? I don't understand all the technical details, but I am inclined to
make it non-deletable in Hob (i.e. it is not possible to delete this layer
in Hob).

What do you think?

Belen

On 27/03/2012 17:56, "Joshua Lock" <josh at linux.intel.com> wrote:

>On 27/03/12 00:19, Lu, Lianhao wrote:
>>
>>> -----Original Message-----
>>> From: yocto-bounces at yoctoproject.org
>>>[mailto:yocto-bounces at yoctoproject.org] On Behalf Of Xu, Dongxiao
>>> Sent: Tuesday, March 27, 2012 2:49 PM
>>> To: yocto
>>> Subject: [yocto] Deleting layers in Hob
>>>
>>> When using Hob in Yocto Project, I found a issue when deleting layers.
>>>I
>>> think I ever raised this problem before.
>>>
>>> Let me briefly introduce how layer removal works in Hob. When user
>>> changes a layer, it will following the below steps
>>> 1) init the cooker.
>>> 2) set new layers to cooker.
>>> 3) parse configuration files.
>>> 4) get available machines, distros, SDKs, etc.
>>>
>>> As we know, if we source oe-init-build-env in Yocto project
>>>environment,
>>> we will have DISTRO="poky" set in local.conf by default, where the
>>> "poky" DISTRO comes from the meta-yocto layer. If user deletes
>>> meta-yocto in Hob, and then error will happen when bitbake parsing the
>>> local.conf, since it could not find where the "poky" DISTRO is defined.
>>>
>>> Even if we are able to successfully removed the meta-yocto layer by
>>> removing the DISTRO definition in local.conf, system will report
>>>another
>>> issue that:
>>>
>>> Your configuration is using stamp files including the sstate hash but
>>> your build directory was built with stamp files that do not include
>>> this.
>>> To continue, either rebuild or switch back to the OEBasic signature
>>> handler with BB_SIGNATURE_HANDLER = 'OEBasic'.
>>>
>>> This is because BB_SIGNATURE_HANDLER = "OEBasic" is also defined in
>>> meta-yocto layer (poky.conf).
>>
>> Meta-yocto is using OEBasicHash as default signature
>>handler(ABI_VERSION=8, see ${TMPDIR}/abi_version), while oe-core is
>>still using the OEBasic(ABI_VERSION=7). This means the oe-core can not
>>reuse the stamp files generated by meta-yocto.
>
>Could we workaround the incompatibility by setting BB_SIGNATURE_HANDLER
>= "OEBasic" somewhere in meta-hob?
>
>Cheers,
>Joshua
>-- 
>Joshua '贾詡' Lock
>         Yocto Project "Johannes factotum"
>         Intel Open Source Technology Centre
>_______________________________________________
>yocto mailing list
>yocto at yoctoproject.org
>https://lists.yoctoproject.org/listinfo/yocto

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