[Buildroot] Knowing whether the target is multicore

[Frank Hunleth]

Hi Baruch,

On Wed, Dec 11, 2013 at 12:35 AM, Baruch Siach <baruch at tkos.co.il> wrote:
> Hi Frank,
>
> On Tue, Dec 10, 2013 at 04:55:37PM -0500, Frank Hunleth wrote:
>> From what I can tell, the answer is no, but I was wondering if there
>> was any way of knowing in a package's .mk file whether the target is
>> single or multicore.
>>
>> The reason that I'm asking is that I'm currently working with the
>> Erlang package. The Erlang configure script can be told whether to
>> build a VM that supports multi-core or not. By default, it builds VMs
>> for both cases. This works, but takes quite a bit longer to compile
>> and adds to the target image size. I'd like to be able to set this
>> appropriately, and it seems like this would be better accomplished
>> using an arch-specific BR2_ variable rather than something in the
>> Erlang package's Config.in.
>
> Whether a target is SMP or not depends on architecture and kernel
> configuration, and that might be outside of Buildroot control when not
> building the kernel internally. In my opinion, there should be a config option
> allowing the user to select the SMP version or the UP one (or both).

Makes sense. Thanks.

Frank