Re: [Discuss-gnuradio] Bitbaking GnuRadio with meta-sdr master issues

[Murray Thomson]

That's very helpful Nathan, thank you. I will have a look when I find some time and I'll report any findings.

Cheers,

Murray

On 20 April 2015 at 01:37, West, Nathan <address@hidden> wrote:

It definitely can compile on machines with no neon support, but this problem is more subtle than that. qemuarm is probably one of the few targets that claims to be a cortex-a9 and not have NEON. As Phil said, we need to improve NEON detection when adding asm kernels to support this case. If you'd like to help I can point you in the right direction.

The problem likely occurs in lib/CMakeLists.txt in the block at line 400. We previously made an assumption that armv7 has NEON, which (I think) is true most of the time (qemuarm being the first exception I've seen). I don't know off the top of my head how to fix this, but if you want to look around that's the starting place.

Cheers,

-Nathan

On Sun, Apr 19, 2015 at 6:10 PM, Murray Thomson <address@hidden> wrote:

Thanks for your answer Philip. I think you are right, qemuarm doesn't seem to have neon support yet.

It would be great if someone that knows Volk could confirm if it's meant to be able to compile in machines with no neon support.

Regards,

Murray

On 19 April 2015 at 18:51, Philip Balister <address@hidden> wrote:

On 04/19/2015 11:07 AM, Murray Thomson wrote:
> Hello,
>
> I have built the gnuradio-dev-image for an arm machine and I wanted to
> share a couple of small issues that I found in the process.
>
> - The meta-sdr/conf/bblayers.conf.sample doesn't include all the layers
> needed. This is correctly warned in the README file of the layer. I've
> attached the file that worked for me in case someone finds it useful.
>

I'll double check this.

> - A couple of the layers include recipe.bbappend files for recipes that
> have been updated recently. I solved this ignoring them with BBMASK as you
> can see in the bblayers.conf file.
>
> - valgrind recipe failed. This seem to be a problem with the Yocto master
> branch so I deleted it from the recipes and I built without it.
>

Master will be a bit messy for a while. Right now a lot of post release
updates are going in, so I expect things to be unstable for a bit.

> - volk failed to compile for qemuarm machine. I couldn't work around this
> one. I've attached the log file. Some of the recipes, including
> gnuradio_git depend on it so I don't think I'll be able to ignore it.
>

Looks like that is a machine without neon support. I suspect volk needs
to be a little more careful working out if neon is available.

> The only real issue is the last one. It would be great to be able to
> compile for qemuarm. Could anyone give me a pointer to fix this? My machine
> runs Ubuntu 12.04 32 bit and the master branch for all the BSPs.
>
> Thanks,
> Murray
>
>
>
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