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Documentation: KUnit: add note about mrproper in start.rst

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The "Getting Started" guide should be beginner-friendly, therefore
add a note about the requirement of a clean source tree when running
kunit_tool for the first time, and its related error.

Signed-off-by: Tales Aparecida <tales.aparecida@gmail.com>
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
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Tales Aparecida 2022-08-21 23:26:41 -03:00 committed by Shuah Khan
parent 5ceb9a2558
commit c5b6c4ecbd
1 changed files with 16 additions and 0 deletions
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Documentation/dev-tools/kunit/start.rst
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@ -19,6 +19,22 @@ can run kunit_tool:
./tools/testing/kunit/kunit.py run
.. note ::
You may see the following error:
"The source tree is not clean, please run 'make ARCH=um mrproper'"
This happens because internally kunit.py specifies ``.kunit``
(default option) as the build directory in the command ``make O=output/dir``
through the argument ``--build_dir``. Hence, before starting an
out-of-tree build, the source tree must be clean.
There is also the same caveat mentioned in the "Build directory for
the kernel" section of the :doc:`admin-guide </admin-guide/README>`,
that is, its use, it must be used for all invocations of ``make``.
The good news is that it can indeed be solved by running
``make ARCH=um mrproper``, just be aware that this will delete the
current configuration and all generated files.
If everything worked correctly, you should see the following:
.. code-block::