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(From yocto-docs rev: f59504d8706a817e0b5a6235ebb69cb3b3ebb277) Signed-off-by: Alexander Kanavin <alex@linutronix.de> Signed-off-by: Antonin Godard <antonin.godard@bootlin.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
161 lines
5.3 KiB
ReStructuredText
161 lines
5.3 KiB
ReStructuredText
.. SPDX-License-Identifier: CC-BY-SA-2.0-UK
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.. |yocto-codename| replace:: whinlatter
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.. |yocto-ver| replace:: 5.3
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.. Note: anchors id below cannot contain substitutions so replace them with the
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value of |yocto-ver| above.
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Release |yocto-ver| (|yocto-codename|)
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======================================
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Migration notes for |yocto-ver| (|yocto-codename|)
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--------------------------------------------------
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This section provides migration information for moving to the Yocto
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Project |yocto-ver| Release (codename "|yocto-codename|") from the prior release.
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:term:`WORKDIR` changes
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~~~~~~~~~~~~~~~~~~~~~~~
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``S = ${WORKDIR}/something`` no longer supported
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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If a recipe has :term:`S` set to be ``${``\ :term:`WORKDIR`\ ``}/something``,
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this is no longer supported, and an error will be issued. The recipe should be
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changed to::
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S = "${UNPACKDIR}/something"
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``S = ${WORKDIR}/git`` and ``S = ${UNPACKDIR}/git`` should be removed
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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The Git fetcher now unpacks into the :term:`BB_GIT_DEFAULT_DESTSUFFIX` directory
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rather than the ``git/`` directory under :term:`UNPACKDIR`.
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:term:`BB_GIT_DEFAULT_DESTSUFFIX` is set in :term:`OpenEmbedded-Core
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(OE-Core)`'s :oe_git:`bitbake.conf
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</openembedded-core/tree/meta/conf/bitbake.conf>` to :term:`BP`.
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This location matches the default value of :term:`S` set by bitbake.conf, so :term:`S`
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setting in recipes can and should be removed.
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Note that when :term:`S` is set to a subdirectory of the git checkout, then it
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should be instead adjusted according to the previous point::
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S = "${UNPACKDIR}/${BP}/something"
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Note that "git" as the source checkout location can be hardcoded
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in other places in recipes; when it's in :term:`SRC_URI`, replace with
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:term:`BB_GIT_DEFAULT_DESTSUFFIX`, otherwise replace with :term:`BP`.
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How to make those adjustments without tedious manual editing
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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The following sed command can be used to remove S = "${WORKDIR}/git
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across a whole layer::
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sed -i "/^S = \"\${WORKDIR}\/git\"/d" `find . -name *.bb -o -name *.inc -o -name *.bbclass`
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Then, the following command can tweak the remaining :term:`S` assignments to
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refer to :term:`UNPACKDIR` instead of :term:`WORKDIR`::
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sed -i "s/^S = \"\${WORKDIR}\//S = \"\${UNPACKDIR}\//g" `find . -name *.bb -o -name *.inc -o -name *.bbclass`
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The first change can introduce a lot of consecutive empty lines, so those can be removed with::
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sed -i -z -E 's/([ \t\f\v\r]*\n){3,}/\n\n/g' `find . -name *.bb -o -name *.inc`
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Supported kernel versions
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~~~~~~~~~~~~~~~~~~~~~~~~~
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The :term:`OLDEST_KERNEL` setting is XXX in this release, meaning that
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out the box, older kernels are not supported. See :ref:`4.3 migration notes
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<migration-4.3-supported-kernel-versions>` for details.
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Supported distributions
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~~~~~~~~~~~~~~~~~~~~~~~
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Compared to the previous releases, running BitBake is supported on new
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GNU/Linux distributions:
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- XXX
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On the other hand, some earlier distributions are no longer supported:
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- XXX
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See :ref:`all supported distributions <system-requirements-supported-distros>`.
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Rust language changes
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~~~~~~~~~~~~~~~~~~~~~
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systemd changes
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~~~~~~~~~~~~~~~
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Recipe changes
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~~~~~~~~~~~~~~
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Removed variables
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~~~~~~~~~~~~~~~~~
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The following variables have been removed:
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Removed recipes
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~~~~~~~~~~~~~~~
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The following recipes have been removed in this release:
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Removed classes
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~~~~~~~~~~~~~~~
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The following classes have been removed in this release:
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- ``kernel-fitimage.bbclass``: the class has been replaced by the
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:ref:`ref-classes-kernel-fit-image` class. The new implementation resolves
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the long-standing :yocto_bugs:`bug 12912</show_bug.cgi?id=12912>`.
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If you are using the kernel FIT image support, you will need to:
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#. Make sure to include ``kernel-fit-extra-artifacts`` in your :term:`KERNEL_CLASSES`
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variable to ensure the required files are exposed to the :term:`DEPLOY_DIR_IMAGE`
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directory::
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KERNEL_CLASSES += "kernel-fit-extra-artifacts"
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#. Use the specific FIT image recipe rather than the base kernel recipe.
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For example, instead of::
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bitbake linux-yocto
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the FIT image is now build by::
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bitbake linux-yocto-fitimage
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For custom kernel recipes, creating a corresponding custom FIT image recipe
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is usually a good approach.
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#. If a FIT image is used as a replacement for the kernel image in the root
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filesystem, add the following configuration to your machine configuration
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file::
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# Create and deploy the vmlinux artifact which gets included into the FIT image
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KERNEL_CLASSES += "kernel-fit-extra-artifacts"
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# Do not install the kernel image package
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RRECOMMENDS:${KERNEL_PACKAGE_NAME}-base = ""
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# Install the FIT image package
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MACHINE_ESSENTIAL_EXTRA_RDEPENDS += "linux-yocto-fitimage"
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# Configure the image.bbclass to depend on the FIT image instead of only
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# the kernel to ensure the FIT image is built and deployed with the image
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KERNEL_DEPLOY_DEPEND = "linux-yocto-fitimage:do_deploy"
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See the :ref:`ref-classes-kernel-fit-image` section for more information.
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Removed features
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~~~~~~~~~~~~~~~~
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The following features have been removed in this release:
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Miscellaneous changes
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~~~~~~~~~~~~~~~~~~~~~
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