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author | Luca Ceresoli <luca.ceresoli@bootlin.com> | 2023-05-05 11:10:06 +0200 |
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committer | Richard Purdie <richard.purdie@linuxfoundation.org> | 2023-05-06 09:38:58 +0100 |
commit | 8cba63f668d33d88d121fdd14201d04cb8164f2a (patch) | |
tree | 652babcf35809580db2dbafe34eb2f344bb6d59a /documentation/ref-manual | |
parent | a019f55a2875c146c062ce65f957d4dc4842d7a8 (diff) | |
download | poky-8cba63f668d33d88d121fdd14201d04cb8164f2a.tar.gz |
ref-manual: classes: kernel: document automatic defconfig usage
Since a very long time the kernel bbclass uses a defconfig file from
SRC_URI automatically. Document this feature.
(From yocto-docs rev: 220b25d7d47d46b0d85c616b88ead75fab917092)
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Reviewed-by: Michael Opdenacker <michael.opdenacker@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Diffstat (limited to 'documentation/ref-manual')
-rw-r--r-- | documentation/ref-manual/classes.rst | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/documentation/ref-manual/classes.rst b/documentation/ref-manual/classes.rst index 83691646aa..ab1628401e 100644 --- a/documentation/ref-manual/classes.rst +++ b/documentation/ref-manual/classes.rst | |||
@@ -1532,6 +1532,13 @@ code to build all kernel trees. All needed headers are staged into the | |||
1532 | :term:`STAGING_KERNEL_DIR` directory to allow out-of-tree module builds | 1532 | :term:`STAGING_KERNEL_DIR` directory to allow out-of-tree module builds |
1533 | using the :ref:`ref-classes-module` class. | 1533 | using the :ref:`ref-classes-module` class. |
1534 | 1534 | ||
1535 | If a file named ``defconfig`` is listed in :term:`SRC_URI`, then by default | ||
1536 | :ref:`ref-tasks-configure` copies it as ``.config`` in the build directory, | ||
1537 | so it is automatically used as the kernel configuration for the build. This | ||
1538 | copy is not performed in case ``.config`` already exists there: this allows | ||
1539 | recipes to produce a configuration by other means in | ||
1540 | ``do_configure:prepend``. | ||
1541 | |||
1535 | Each built kernel module is packaged separately and inter-module | 1542 | Each built kernel module is packaged separately and inter-module |
1536 | dependencies are created by parsing the ``modinfo`` output. If all modules | 1543 | dependencies are created by parsing the ``modinfo`` output. If all modules |
1537 | are required, then installing the ``kernel-modules`` package installs all | 1544 | are required, then installing the ``kernel-modules`` package installs all |