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Paul Eggleton 3bf2d2103e 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>

2011-07-05 13:36:51 +01:00

bitbake

bitbake/cooker: implement layer dependencies, make priority optional

2011-07-05 13:36:51 +01:00

documentation

documentation/adt-manual/adt-command.xml: Small edits for terminology (From yocto-docs rev: b32290b381a6ed2cbfe3e01b748c794ef6bc876b)

2011-06-24 11:28:12 +01:00

README

Poky

Poky is an integration of various components to form a complete prepackaged build system and development environment. It features support for building customised embedded device style images. There are reference demo images featuring a X11/Matchbox/GTK themed UI called Sato. The system supports cross-architecture application development using QEMU emulation and a standalone toolchain and SDK with IDE integration.

Additional information on the specifics of hardware that Poky supports is available in README.hardware. Further hardware support can easily be added in the form of layers which extend the systems capabilities in a modular way.

As an integration layer Poky consists of several upstream projects such as BitBake, OpenEmbedded-Core, Yocto documentation and various sources of information e.g. for the hardware support. Poky is in turn a component of the Yocto Project.

The Yocto Project has extensive documentation about the system including a reference manual which can be found at: http://yoctoproject.org/community/documentation

For information about OpenEmbedded see their website: http://www.openembedded.org/