migration-guides: update the release notes for 5.2

Update the release note and migration guide for the 5.2 release. This
release is not due until April 2025, but this catches up what has
already been applied since 5.1.

Precisely, this tracks the important changes between commits
8149e74258 and 87d7341465 in poky.

(From yocto-docs rev: a51a94f0b228d570d915dff36a49132e90e93cf1)

Signed-off-by: Antonin Godard <antonin.godard@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 56 insertions, 0 deletions

diff --git a/documentation/migration-guides/migration-5.2.rst b/documentation/migration-guides/migration-5.2.rst
index 7b35e7721f..cb70e19da0 100644
--- a/documentation/migration-guides/migration-5.2.rst
+++ b/documentation/migration-guides/migration-5.2.rst
@@ -14,6 +14,28 @@ 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.
 
+``debug-tweaks`` removed from :term:`IMAGE_FEATURES`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+The ``debug-tweaks`` image feature is now removed because it was too vague about
+what it achieved: an image on which the ``root`` user can login without a
+password.
+
+To achieve the same result, the features previously added by ``debug-tweaks``
+should be manually added to the :term:`IMAGE_FEATURES` variable. These are:
+
+-  ``allow-empty-password``
+-  ``allow-root-login``
+-  ``empty-root-password``
+-  ``post-install-logging``
+
+Such a statement would be::
+
+   IMAGE_FEATURES += "allow-empty-password allow-root-login empty-root-password post-install-logging"
+
+See the list of available image features in the :ref:`ref-features-image`
+section of the Yocto Project Reference Manual.
+
 Supported kernel versions
 ~~~~~~~~~~~~~~~~~~~~~~~~~
 
@@ -34,9 +56,24 @@ See :ref:`all supported distributions <system-requirements-supported-distros>`.
 Go language changes
 ~~~~~~~~~~~~~~~~~~~
 
+Rust language changes
+~~~~~~~~~~~~~~~~~~~~~
+
+-  Recipes inheriting the :ref:`ref-classes-cargo` do not install libraries by
+   default anymore. This behavior can be controlled by the
+   :term:`CARGO_INSTALL_LIBRARIES` variable.
+
 systemd changes
 ~~~~~~~~~~~~~~~
 
+-  Support for ``split-usr`` and ``unmerged-usr`` are now removed after Systemd
+   was updated to version 255. This option allowed installing Systemd in a
+   system where directories such as ``/lib``, ``/sbin`` or ``/bin`` are *not*
+   merged into ``/usr``.
+
+   As a consequence, the ``systemd`` recipe no longer contains the ``usrmerge``
+   :term:`PACKAGECONFIG` option as it is now implied by default.
+
 Recipe changes
 ~~~~~~~~~~~~~~
 
@@ -45,16 +82,35 @@ Removed variables
 
 The following variables have been removed:
 
+-  ``PACKAGE_SNAP_LIB_SYMLINKS``: related to an unmaintained and obsolete
+   "micro" :term:`distro <DISTRO>`.
+
+-  ``SETUPTOOLS_INSTALL_ARGS``: obsolete and unused variable.
+
+-  ``BB_DANGLINGAPPENDS_WARNONLY``: support for only warning the user when a
+   ``.bbappend`` file doesn't apply to the original recipe has been dropped. See
+   the :ref:`dev-manual/layers:Appending Other Layers Metadata With Your Layer`
+   section of the Yocto Project Development Tasks Manual for alternatives to
+   this variable.
+
 Removed recipes
 ~~~~~~~~~~~~~~~
 
 The following recipes have been removed in this release:
 
+-  ``liburi-perl``: moved to :oe_git:`meta-perl </meta-openembedded/tree/meta-perl>`.
+-  ``python3-isodate``: moved to :oe_git:`meta-python </meta-openembedded/tree/meta-python>`.
+-  ``python3-iniparse``: removed as there are no consumers of this recipe in
+   :oe_git:`openembedded-core </openembedded-core>` or :oe_git:`meta-openembedded </meta-openembedded>`.
+
 Removed classes
 ~~~~~~~~~~~~~~~
 
 The following classes have been removed in this release:
 
+-  ``migrate_localcount.bbclass``: obsolete class for which code was already
+   removed in 2012.
+
 Miscellaneous changes
 ~~~~~~~~~~~~~~~~~~~~~