[meta-freescale] [meta-fsl-demos][PATCH] riotboard: Fix broken image builds against linux-fslc

[Nikolay Dimitrov]

Hi Otavio,

On 05/11/2015 08:46 PM, Otavio Salvador wrote:
> On Mon, May 11, 2015 at 2:24 PM, Nikolay Dimitrov <picmaster at mail.bg>
> wrote:
>> Hi Otavio,
>>
>> On 05/11/2015 08:09 PM, Otavio Salvador wrote:
>>>
>>> On Mon, May 11, 2015 at 1:43 PM, Nikolay Dimitrov
>>> <picmaster at mail.bg> wrote:
>>>>
>>>> Ping.
>>>
>>>
>>> I am building it here for testing.
>>
>>
>> That's great, thanks for looking into it.
>
> Your patch can get a change:
>
> diff --git a/conf/machine/imx6dl-riotboard.conf
> b/conf/machine/imx6dl-riotboard.conf index bf50eaf..260deed 100644
> --- a/conf/machine/imx6dl-riotboard.conf +++
> b/conf/machine/imx6dl-riotboard.conf @@ -19,4 +19,4 @@ SERIAL_CONSOLE
> = "115200 ttymxc1" # FIXME: Workaround for building against
> linux-fslc MACHINE_EXTRA_RRECOMMENDS_remove = "fsl-alsa-plugins"
> PREFERRED_VERSION_imx-test = "00.00.00" -MACHINE_GSTREAMER_PLUGIN =
> "" +MACHINE_GSTREAMER_PLUGIN_imx6dl-riotboard = ""
>
> This makes the patch in meta-fsl-demos not needed and seems cleaner.
>
> Can you take a look and confirm?

This code sits in riotboard-specific conf file, so there's no difference
between MACHINE_GSTREAMER_PLUGIN and
MACHINE_GSTREAMER_PLUGIN_imx6dl-riotboard variables. The machine suffix
is redundant in the 2nd case. But even if I use the proposed
MACHINE_GSTREAMER_PLUGIN_imx6dl-riotboard, the fsl-image-multimedia-full
image build still fails.

Regarding the meta-fsl-demos patch - the need for this fix is because
the packagegroup-fsl-gstreamer-full.bb is again adding the
gst-plugins-gl dependency, disregarding the available capabilities
(either hardware or kernel).

So, my motivation for doing it this way for short term is the following:
1. I still have single kernel to maintain (fslc) as of today.
2. The board builds are broken at least since 23.April and I have to do
something about it.

FYI, for a long-term solution I plan to do the following, if you agree:
- Support building multiple kernels, including both FSL and FSLC
- Somehow declare the capabilities of the hardware/kernel and take it
into account by in recipes. We need something like KERNEL_FEATURES and
MACHINE_FEATURES, and only if a feature is declared by both variables,
then it should be used (not sure whether this is the same as the
COMBINED_FEATURES mechanism). I'm looking towards your ideas here, as
you guys have much more Yocto experience than me.

To summarize: my patch set is not perfect, but as of today we don't
have all the ingredients to make it perfect. Tomorrow we could have
these ingredients, but I can't see how far is this tomorrow.

Regards,
Nikolay