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migration-3.4: Add extra notes to override syntax changes

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(From yocto-docs rev: dba53562b684c511fb59a3272656cb6052f28fb2)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Reviewed-by: Michael Opdenacker <michael.opdenacker@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
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Richard Purdie
2021-08-04 10:47:14 +01:00
parent ae6153e10b
commit eb047a25bb
1 changed files with 7 additions and 0 deletions
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documentation/migration-guides/migration-3.4.rst
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@@ -56,6 +56,13 @@ context being specific tasks in that case. Tune overrides are another special
case where some code does use them as overrides but some does not. We plan to try
and make the tune code use overrides more consistently in the future.
There are some variables which do not use override syntax which include the
suffix to variables in ``layer.conf`` files such as :term:`BBFILE_PATTERN`,
:term:`SRCREV`\ ``_xxx`` where ``xxx`` is a name from :term:`SRC_URI` and
:term:`PREFERRED_VERSION`\ ``_xxx``. In particular, ``layer.conf`` suffixes
may be the same as a :term:`DISTRO` override causing some confusion. We do
plan to try and improve consistency as these issues are identified.
To help with migration of layers there is a script in OE-Core. Once configured
with the overrides used by a layer, this can be run as::