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kernel-dev: document KCONFIG_MODE

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(From yocto-docs rev: 12aa6f9c6af68ea03fbb056677213b00d693cf5f)

Signed-off-by: Daniel Wagenknecht <dwagenknecht@emlix.com>
Reviewed-by: Michael Opdenacker <michael.opdenacker@bootlin.com>
Reviewed-by: Quentin Schulz <foss@0leil.net>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
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Daniel Wagenknecht
2021-05-05 10:57:50 +02:00
committed by Richard Purdie
parent 0fc54213c2
commit e145129aaa
2 changed files with 47 additions and 0 deletions
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9
documentation/kernel-dev/common.rst
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@@ -650,6 +650,15 @@ extends the :term:`FILESPATH`
variable (search directories) to include the ``${PN}`` directory you
created to hold the configuration changes.
You can also use a regular ``defconfig`` file, as generated by the
:ref:`ref-tasks-savedefconfig`
task instead of a complete ``.config`` file. This only specifies the
non-default configuration values. You need to additionally set
:term:`KCONFIG_MODE`
in the linux-yocto ``.bbappend`` file in your layer::
KCONFIG_MODE = "alldefconfig"
.. note::
The build system applies the configurations from the ``defconfig``