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dev-manual: layers: Add notes about layer.conf

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As discussed before with Richard Purdie, the code supports this but the documentation does not.
Developers in general will not notice this or focus on it because they do not mess with the
layer.conf template file, but in my opinion I think more details can help.

(From yocto-docs rev: c4b94c24ff7e1b1609f9c7f0aebd24fd04d00ae9)

Signed-off-by: Talel BELHAJSALEM <bhstalel@gmail.com>
Reviewed-by: Michael Opdenacker <michael.opdenacker@bootlin.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>
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BELHADJ SALEM Talel 2023-10-17 13:05:24 +01:00 committed by Steve Sakoman
parent 955796ad7e
commit c3032cebe7
1 changed files with 14 additions and 0 deletions
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documentation/dev-manual/layers.rst
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@ -128,6 +128,20 @@ Follow these general steps to create your layer without using tools:
variable is a good way to indicate if your particular layer is
current.
.. note::
A layer does not have to contain only recipes ``.bb`` or append files
``.bbappend``. Generally, developers create layers using
``bitbake-layers create-layer``.
See ":ref:`dev-manual/layers:creating a general layer using the \`\`bitbake-layers\`\` script`",
explaining how the ``layer.conf`` file is created from a template located in
``meta/lib/bblayers/templates/layer.conf``.
In fact, none of the variables set in ``layer.conf`` are mandatory,
except when :term:`BBFILE_COLLECTIONS` is present. In this case
:term:`LAYERSERIES_COMPAT` and :term:`BBFILE_PATTERN` have to be
defined too.
#. *Add Content:* Depending on the type of layer, add the content. If
the layer adds support for a machine, add the machine configuration
in a ``conf/machine/`` file within the layer. If the layer adds