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doc: sysbuild: Document the BUILD_ONLY parameter

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Add a brief subsection about how to build a Zephyr application without
flashing it.

Signed-off-by: Grzegorz Swiderski <grzegorz.swiderski@nordicsemi.no>
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Grzegorz Swiderski 2023-08-07 12:41:51 +02:00 committed by Fabio Baltieri
parent 93b1fb2713
commit d821655def
1 changed files with 21 additions and 0 deletions
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doc/build/sysbuild/index.rst vendored
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@ -556,6 +556,27 @@ disable it using the Kconfig option ``SECOND_SAMPLE``.
For more information on setting sysbuild Kconfig options,
see :ref:`sysbuild_kconfig_namespacing`.
Building without flashing
=========================
You can mark ``my_sample`` as a build-only application in this manner:
.. code-block:: cmake
ExternalZephyrProject_Add(
APPLICATION my_sample
SOURCE_DIR <path-to>/my_sample
BUILD_ONLY TRUE
)
As a result, ``my_sample`` will be built as part of the sysbuild build invocation,
but neither ``west flash`` nor ``west debug`` will be aware of this application.
Instead, you may use the outputs of this domain for other purposes - for example,
to produce a secondary image for DFU, or to merge multiple images together.
You can also replace ``TRUE`` with another boolean constant in CMake, such as
a Kconfig option, which would make ``my_sample`` conditionally build-only.
Zephyr application configuration
================================