[Buildroot] how to tune powerpc e500v2 cpus in BR

[Bryan Hundven]

On Fri, Jun 24, 2011 at 2:41 PM, raymond zhao <raymond.zhao.ml at gmail.com> wrote:
> The error caused by the option "-mabi=spe"
> The cross compiler report: cc1: error: not configured for ABI: 'spe'.
> So, there must be some option need to be past when we compile the GCC.
> Anyone has any idea?

What version of gcc are you using?

> thanks,
>
> Raymond
>
> On Fri, Jun 24, 2011 at 5:14 PM, raymond zhao <raymond.zhao.ml at gmail.com> wrote:
>>
>> Thanks, Matias
>> After looked into the scripts. I believe you are right. But somehow I have
>> problem with building target gdb server when I put this flags there. I am
>> keep digging now.
>>
>> thanks
>>
>> raymond
>> On Fri, Jun 24, 2011 at 1:31 PM, Matias Garcia <mgarcia at rossvideo.com>
>> wrote:
>>>
>>> Hi Raymond,
>>>
>>> You can put those in the BR2_TARGET_OPTIMIZATIONS setting under the
>>> Toolchain page e.g.
>>>
>>> (-mcpu=8548 -mspe=yes -mabi=spe -mhard-float -mfloat-gprs=double)  Target
>>> Optimizations
>>>
>>> I selected a generic powerpc target because I didn't need the -mtune when
>>> I was specifying -mcpu already. As far as I know, 8548 and 8540 work out to
>>> the same code.
>>>
>>> I switched to the external CodeSourcery build tools for two reasons: (1)
>>> it allowed us to compile our application with -O3 (which we need) while the
>>> standard GNU toolchain caused some errors, and (2) they're supported by the
>>> Freescale/Mentor/CodeSourcery relationship, and not all of the patches get
>>> applied to mainline (particularly for newer processors). I had to add an
>>> option to the external wrapper so that it would call the toolchain with
>>> '-te500v2' which is a shortcut for the optimizations you list below. In that
>>> case, you can build your own applications without calling any options
>>> explicitly.
>>>
>>> Cheers,
>>> Matias
>>>
>>> On 11-06-24 10:27 AM, raymond zhao wrote:
>>>>
>>>> Hi,
>>>> I am using freescale's p1020 CPU. It is a e500v2 core. How could I
>>>> config the build root to tune the tool chain for the following
>>>> options:
>>>>
>>>> -mcpu=8548 -mspe=yes -mabi=spe -mhard-float -mfloat-gprs=double
>>>>
>>>>  From the menuconfig, I can only select CPU as 8540.
>>>>
>>>> Thanks,
>>>>
>>>> Raymond
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>>
>>
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