mirror of
https://git.yoctoproject.org/poky
synced 2026-05-01 06:32:11 +02:00
8242bd30de
To complement what I am adding to the BitBake reference manual, add a section in the 4.2 migration guide, a reference in the structure section of the reference manual (where we talk about meta/lib) and adjust the release notes item to be a little more concise. (From yocto-docs rev: 0903e82a9da263c6d64aead03407eb377eb5bbfe) Signed-off-by: Paul Eggleton <bluelightning@bluelightning.org> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
92 lines
3.5 KiB
ReStructuredText
92 lines
3.5 KiB
ReStructuredText
.. SPDX-License-Identifier: CC-BY-SA-2.0-UK
|
|
|
|
Release notes for 4.2 (mickledore)
|
|
----------------------------------
|
|
|
|
New Features / Enhancements in 4.2
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
- Python 3.8 is the minimum Python version required on the build host.
|
|
For host distributions that do not provide it, this is included as part of the
|
|
:term:`buildtools` tarball.
|
|
|
|
- BitBake in this release now supports a new ``addpylib`` directive to enable
|
|
Python libraries within layers. For more information,
|
|
see :ref:`bitbake-user-manual/bitbake-user-manual-metadata:extending python library code`.
|
|
|
|
- BitBake has seen multiple internal changes that may impact
|
|
memory and disk usage as well as parsing time, in particular:
|
|
|
|
- BitBake's Cooker server is now multithreaded.
|
|
|
|
- BitBake's cache has been extended to include more hash
|
|
debugging data, but has also been optimized to :yocto_git:`compress
|
|
cache data <https://git.yoctoproject.org/poky/commit/?h=mickledore&id=7d010055e2af3294e17db862f42664ca689a9356>`.
|
|
|
|
- BitBake's Cooker server :yocto_git:`can now be pinged
|
|
</poky/commit/?h=mickledore&id=26f255da09>`
|
|
from the UI.
|
|
|
|
- Architecture-specific enhancements:
|
|
|
|
- This release adds initial support for the
|
|
:wikipedia:`LoongArch <Loongson#LoongArch>`
|
|
(``loongarch64``) architecture, though there is no testing for it yet.
|
|
|
|
- Kernel-related enhancements:
|
|
|
|
- QEMU/runqemu enhancements:
|
|
|
|
- Image-related enhancements:
|
|
|
|
- New variables:
|
|
|
|
- :term:`VOLATILE_TMP_DIR` allows to specify
|
|
whether ``/tmp`` should be on persistent storage
|
|
or in RAM.
|
|
|
|
- Rust improvements:
|
|
|
|
- This release adds Cargo support on the target, and includes
|
|
automated QA tests for this functionality.
|
|
|
|
- It also supports checksums for Rust crates and makes
|
|
them mandatory for each crate in a recipe.
|
|
|
|
- Testing:
|
|
|
|
- The ptest images have changed structure in this release. The
|
|
underlying ``core-image-ptest`` recipe now uses :term:`BBCLASSEXTEND` to
|
|
create a variant for each ptest enabled recipe in OE-Core.
|
|
|
|
For example, this means that ``core-image-ptest-bzip2``,
|
|
``core-image-ptest-lttng-tools`` and many more image targets now exist
|
|
and can be built/tested individually.
|
|
|
|
The ``core-image-ptest-all`` and ``core-image-ptest-fast`` targets are now
|
|
wrappers that target groups of individual images and means that the tests
|
|
can be executed in parallel during our automated testing. This also means
|
|
the dependencies are more accurately tested.
|
|
|
|
- It is now possible to track regression changes between releases using
|
|
:oe_git:`yocto_testresults_query.py </openembedded-core/tree/scripts/yocto_testresults_query.py>`,
|
|
which is a thin wrapper over :oe_git:`resulttool
|
|
</openembedded-core/tree/scripts/resulttool>`. Here is an example
|
|
command, which allowed to spot and fix a regression in the
|
|
``quilt`` ptest::
|
|
|
|
yocto_testresults_query.py regression-report 4.2_M1 4.2_M2
|
|
|
|
See this `blog post about regression detection
|
|
<https://bootlin.com/blog/continuous-integration-in-yocto-improving-the-regressions-detection/>`__.
|
|
|
|
- This release adds support for parallel ptest execution with a ptest per image.
|
|
This takes ptest execution time from 3.5 hours to around 45 minutes on the autobuilder.
|
|
|
|
- Miscellaneous changes:
|
|
|
|
- Supporting 64 bit dates on 32 bit platforms: several packages have been
|
|
updated to pass Y2038 tests.
|
|
|
|
- Many packages were updated to add large file support.
|