[yocto] How to request a certain version of a recipes for an image?

[Patrick Boettcher]

On Sun, 4 Nov 2018 18:38:18 -0800
Andre McCurdy <armccurdy at gmail.com> wrote:

> On Sun, Nov 4, 2018 at 2:30 PM Patrick Boettcher
> <patrick.boettcher at posteo.de> wrote:
> >
> > Hi list,
> >
> > I'm using the morty-release for my device.
> >
> > My sources consists of different layers. Some application
> > specific-layers (which contains a image-recipe), our
> > BSP-provider and tooling-layers.
> >
> > It now happens that in there is package (dt-utils) which has
> > recipes in two different layers, with different versions.
> >
> > In my image-file I request the package via
> >
> >     IMAGE_INSTALL += "dt-utils"
> >
> > How do I force the version of dt-utils for this image? By default it
> > selects the wrong one.
> >
> > Here's what I tried, by adding to the image-recipe:
> >
> >     DEPENDS += "dt-utils (>= 2017.03.0)"
> >
> > and
> >
> >     RDEPENDS += "dt-utils (>= 2017.03.0)"
> >
> > seems to have no effect. Adding the version-logic to the
> > IMAGE_INSTALL-line fails to build.
> >
> > What works is to add PREFERRED_VERSION to local.conf. But this is
> > not committable, so I'd like to avoid it.  
> 
> You can't directly influence the build of one recipe (ie dt-utils) by
> making a change in another recipe (ie the image recipe), so the
> DEPENDS and RDEPENDS style changes you have tried will not work.
> Variables in the image recipe are not visible when the dt-utils recipe
> is built.
> 
> Setting PREFERRED_VERSION from a global config file is a valid
> solution. In that case it's up to you to decide which global config to
> use - adding to local.conf, the machine config, the distro config, a
> meta layer config file will all work. Using either the distro or
> machine config would be the most typical approach - depending on
> whether you want to version preference to apply to one build
> configuration (ie one machine) or to all your builds (ie your distro).
> 
> An alternative solution would to be to change the priority of the
> recipes in the meta layer(s) which contains the dt-utils recipes. e.g.
> increasing BBFILE_PRIORITY_xxx in the layer.conf in the meta layer
> with the dt-utils recipe you want to use.

Thanks Andre, thanks Randy for clearing up my mis-conception of recipes
and conf-files. 

--
Patrick.