[Buildroot] how to tune powerpc e500v2 cpus in BR

[raymond zhao]

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?

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
>>> _______________________________________________
>>> buildroot mailing list
>>> buildroot at busybox.net
>>> http://lists.busybox.net/mailman/listinfo/buildroot
>
>