[OE-core] Question regarding project organization with OE

Philip Balister philip at balister.org
Sat Oct 10 08:39:48 UTC 2015

On 10/09/2015 09:47 PM, Logan Buchy wrote:
> Hi,
> It's my first time posting here, I hope I have the right mailing list!
> I've been looking into OE in the last few days as a candidate to replace
> the ageing build scripts in a project I am involved with.  I've been really
> impressed with OE's feature list - it ticks off a lot of boxes for our
> requirements.
> I am still working out some of the workflows though before we go ahead and
> make the switch, I was hoping someone could help me out.

I'm still recovering from ELCE, but a quick read suggest you should read
up on the MACHINE variable and how to use machine specific overrides.


> The project I am working on consists of several embedded targets.  All
> targets currently run on the same system-on-chip and are built with the
> same toolchain, though this will note be the case in the near future. The
> majority of the project exists as a monolithic application that is built
> with different DEFINEs in order to customize the application's behaviour.
> Each target also has a unique rootfs layout (different init scripts mostly).
> For the sake of clarity, lets call this application 'Foo', and two targets
> 'alpha' and 'beta'.
> I am trying to figure out the best was to setup recipes in order to
> maintain this structure.
> I'm thinking that managing the targets is best left to image-recipes in a
> separate layer.  Essentially adding:
> * recipes-core/images/target-alpha.bb
> * recipes-core/images/target-beta.bb
> Managing the 'Foo' application is currently done with a regular package
> recipe:
> * recipes-core/Foo/foo.bb
> However, I am not sure if the image recipes can dictate how to build Foo,
> the dependent recipe.  Is this possible? Is there an alternative workflow?
> Would it be better if 'targets' were managed as separate distros instead?
> Currently some targets use different kernel versions than others, and all
> targets use different kernel configs.  I haven't yet figured out if this is
> possible to specify from within an image recipe.
> Any help is appreciated!
> Thanks,
> Logan

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