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ref-manual/variables.rst: document the REQUIRED_MACHINE_FEATURES variable

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Added in OE-Core commit: 5f4875b950ce ("distro_features_check: expand
with MACHINE_FEATURES and COMBINED_FEATURES, rename").

Reviewed-by: Quentin Schulz <quentin.schulz@cherry.de>
(From yocto-docs rev: 02d5f9664a71a4f1b72b28d7093c19cc03ec08f6)

Signed-off-by: Antonin Godard <antonin.godard@bootlin.com>
(cherry picked from commit c0551456cba6016d5014c2be8d6906e58a324cc4)
Signed-off-by: Antonin Godard <antonin.godard@bootlin.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>
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Antonin Godard 2025-10-27 13:43:39 +01:00 committed by Steve Sakoman
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commit 5f0dcc1dc6
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documentation/ref-manual/variables.rst
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@ -6837,6 +6837,15 @@ system and gives an overview of their function and contents.
the recipe will be skipped, and if the build system attempts to build
the recipe then an error will be triggered.
:term:`REQUIRED_MACHINE_FEATURES`
When inheriting the :ref:`ref-classes-features_check` class, this variable
identifies :term:`MACHINE_FEATURES` that must exist in the current
configuration in order for the :term:`OpenEmbedded Build System` to build
the recipe. In other words, if the :term:`REQUIRED_MACHINE_FEATURES` variable
lists a feature that does not appear in :term:`MACHINE_FEATURES` within the
current configuration, then the recipe will be skipped, and if the build
system attempts to build the recipe then an error will be triggered.
:term:`REQUIRED_VERSION`
If there are multiple versions of a recipe available, this variable
determines which version should be given preference.