[yocto] ppc e500v2 support?

[Leon Woestenberg]

Hello Mark,

On Thu, Nov 4, 2010 at 7:18 PM, Mark Hatle <mark.hatle at windriver.com> wrote:
> On 11/4/10 1:02 PM, Leon Woestenberg wrote:
>>> and for e500v2:
>>> -mcpu=8548 -mfloat-gprs=double -mspe=yes -mabi=spe
>>> Neither of those would be compatible with the existing "ppc" packaging
>>> arch.
>>>  We will need to generate at least one new packaging arch type, likely 2
>>> (one for each).  Maybe called ppc_spe or something similar?
>>>
>> In OpenEmbedded we use the core variant as the packaging name:
>>
>> TARGET_CC_ARCH = "-mcpu=8548 -mspe=yes -mabi=spe -mhard-float
>> -mfloat-gprs=double"
>> BASE_PACKAGE_ARCH = "ppce500v2"
>> FEED_ARCH = "ppce500v2"
>> PACKAGE_EXTRA_ARCHS += "ppce500v2"
>>
>> Does that make sense?
>>
> I think this is an area we need to coordinate.. I'm not against calling is
> ppce500v2 for right now.  However, I think this is a place we need to
> coordinate efforts.  I'm going to attempt to pull together a list of Linux
> ABIs & potential optimizations in the Yocto wiki.
>
> The reason I bring this up is that over the years at Wind River, and my
> previous experience at MontaVista... and watching Emdebian and other
> projects.. _everyone_ names their package architectures differently..
> because people only have a small view on the problem.  We finally have
> enough history to have a chance at indicating what the actual ABIs are, and
> how the compatibility matrix may fill out.  (also giving us a change to
> finally give these architectures reasonable naming schemes!)
>
I don't see how we could be "final" on this, it seems a returning
topic every few years.

To bring in the OpenEmbedded arch namespace and our optimizations,
from the "master" branch at OpenEmbedded:
http://cgit.openembedded.org/cgit.cgi/openembedded/tree/conf/machine/include?h=master

Regards,
-- 
Leon