bitbake/cooker: implement layer dependencies, make priority optional

Implement (optionally versioned) dependencies between layers, and if layer
priorities are not specified using BBFILE_PRIORITY_layername (now
optional) then work out the layer priority based on dependencies.

Define LAYERDEPENDS_layername in layer.conf to specify the dependencies
of a layer (list of layer names, split with spaces in the usual way);
LAYERVERSION_layername can be defined for each layer allowing specific
version dependencies to be specified via depname:version in the list of
dependencies. An error will be produced if any dependency is missing or
the version numbers do not match exactly (if specified).

Note: default priority if unspecified for a layer with no dependencies is
lowest defined priority + 1 (or 1 if no priorities are defined).

Addresses [YOCTO #790].

(Bitbake rev: 115b89fa279b64e79da0f72caf7b30965a83fab1)

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

0 files changed, 0 insertions, 0 deletions