.. SPDX-License-Identifier: CC-BY-SA-2.0-UK

.. |yocto-codename| replace:: whinlatter
.. |yocto-ver| replace:: 5.3
.. Note: anchors id below cannot contain substitutions so replace them with the
   value of |yocto-ver| above.

Release |yocto-ver| (|yocto-codename|)
======================================

Migration notes for |yocto-ver| (|yocto-codename|)
--------------------------------------------------

This section provides migration information for moving to the Yocto
Project |yocto-ver| Release (codename "|yocto-codename|") from the prior release.

Supported kernel versions
~~~~~~~~~~~~~~~~~~~~~~~~~

The :term:`OLDEST_KERNEL` setting is XXX in this release, meaning that
out the box, older kernels are not supported. See :ref:`4.3 migration notes
<migration-4.3-supported-kernel-versions>` for details.

Supported distributions
~~~~~~~~~~~~~~~~~~~~~~~

Compared to the previous releases, running BitBake is supported on new
GNU/Linux distributions:

-  XXX

On the other hand, some earlier distributions are no longer supported:

-  XXX

See :ref:`all supported distributions <system-requirements-supported-distros>`.

Rust language changes
~~~~~~~~~~~~~~~~~~~~~

systemd changes
~~~~~~~~~~~~~~~

Recipe changes
~~~~~~~~~~~~~~

Removed variables
~~~~~~~~~~~~~~~~~

The following variables have been removed:

Removed recipes
~~~~~~~~~~~~~~~

The following recipes have been removed in this release:

Removed classes
~~~~~~~~~~~~~~~

The following classes have been removed in this release:

-  ``kernel-fitimage.bbclass``: the class has been replaced by the
   :ref:`ref-classes-kernel-fit-image` class. The new implementation resolves
   the long-standing :yocto_bugs:`bug 12912</show_bug.cgi?id=12912>`.

   If you are using the kernel FIT image support, you will need to:

   #. Make sure to include ``kernel-fit-extra-artifacts`` in your :term:`KERNEL_CLASSES`
      variable to ensure the required files are exposed to the :term:`DEPLOY_DIR_IMAGE`
      directory::

         KERNEL_CLASSES += "kernel-fit-extra-artifacts"

   #. Use the specific FIT image recipe rather than the base kernel recipe.
      For example, instead of::

         bitbake linux-yocto

      the FIT image is now build by::

         bitbake linux-yocto-fitimage

      For custom kernel recipes, creating a corresponding custom FIT image recipe
      is usually a good approach.

   #. If a FIT image is used as a replacement for the kernel image in the root
      filesystem, add the following configuration to your machine configuration
      file::

         # Create and deploy the vmlinux artifact which gets included into the FIT image
         KERNEL_CLASSES += "kernel-fit-extra-artifacts"

         # Do not install the kernel image package
         RRECOMMENDS:${KERNEL_PACKAGE_NAME}-base = ""
         # Install the FIT image package
         MACHINE_ESSENTIAL_EXTRA_RDEPENDS += "linux-yocto-fitimage"

         # Configure the image.bbclass to depend on the FIT image instead of only
         # the kernel to ensure the FIT image is built and deployed with the image
         KERNEL_DEPLOY_DEPEND = "linux-yocto-fitimage:do_deploy"

   See the :ref:`ref-classes-kernel-fit-image` section for more information.

Removed features
~~~~~~~~~~~~~~~~

The following features have been removed in this release:

Miscellaneous changes
~~~~~~~~~~~~~~~~~~~~~