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42a6d47754
Signed-off-by: Michael Opdenacker <michael.opdenacker@bootlin.com> CC: Frederic Martinsons <frederic.martinsons@gmail.com> CC: Marta Rybczynska <rybczynska@gmail.com> CC: Paul Eggleton <paul.eggleton@linux.microsoft.com> CC: Alex Kiernan <alex.kiernan@gmail.com> CC: Alexis Lothoré <alexis.lothore@bootlin.com Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
96 lines
3.5 KiB
ReStructuredText
96 lines
3.5 KiB
ReStructuredText
.. SPDX-License-Identifier: CC-BY-SA-2.0-UK
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Release notes for 4.2 (mickledore)
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----------------------------------
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New Features / Enhancements in 4.2
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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- Python 3.8 is the minimum Python version required on the build host.
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For host distributions that do not provide it, this is included as part of the
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:term:`buildtools` tarball.
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- BitBake in this release now supports a new ``addpylib`` directive to enable
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Python libraries within layers.
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This directive should be added to your layer configuration
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as in the below example from ``meta/conf/layer.conf``::
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addpylib ${LAYERDIR}/lib oe
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- BitBake has seen multiple internal changes that may impact
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memory and disk usage as well as parsing time, in particular:
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- BitBake's Cooker server is now multithreaded.
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- BitBake's cache has been extended to include more hash
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debugging data, but has also been optimized to :yocto_git:`compress
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cache data <https://git.yoctoproject.org/poky/commit/?h=mickledore&id=7d010055e2af3294e17db862f42664ca689a9356>`.
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- BitBake's Cooker server :yocto_git:`can now be pinged
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</poky/commit/?h=mickledore&id=26f255da09>`
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from the UI.
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- Architecture-specific enhancements:
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- This release adds initial support for the
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:wikipedia:`LoongArch <Loongson#LoongArch>`
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(``loongarch64``) architecture, though there is no testing for it yet.
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- Kernel-related enhancements:
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- QEMU/runqemu enhancements:
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- Image-related enhancements:
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- New variables:
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- :term:`VOLATILE_TMP_DIR` allows to specify
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whether ``/tmp`` should be on persistent storage
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or in RAM.
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- Rust improvements:
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- This release adds Cargo support on the target, and includes
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automated QA tests for this functionality.
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- It also supports checksums for Rust crates and makes
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them mandatory for each crate in a recipe.
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- Testing:
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- The ptest images have changed structure in this release. The
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underlying ``core-image-ptest`` recipe now uses :term:`BBCLASSEXTEND` to
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create a variant for each ptest enabled recipe in OE-Core.
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For example, this means that ``core-image-ptest-bzip2``,
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``core-image-ptest-lttng-tools`` and many more image targets now exist
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and can be built/tested individually.
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The ``core-image-ptest-all`` and ``core-image-ptest-fast`` targets are now
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wrappers that target groups of individual images and means that the tests
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can be executed in parallel during our automated testing. This also means
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the dependencies are more accurately tested.
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- It is now possible to track regression changes between releases using
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:oe_git:`yocto_testresults_query.py </openembedded-core/tree/scripts/yocto_testresults_query.py>`,
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which is a thin wrapper over :oe_git:`resulttool
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</openembedded-core/tree/scripts/resulttool>`. Here is an example
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command, which allowed to spot and fix a regression in the
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``quilt`` ptest::
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yocto_testresults_query.py regression-report 4.2_M1 4.2_M2
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See this `blog post about regression detection
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<https://bootlin.com/blog/continuous-integration-in-yocto-improving-the-regressions-detection/>`__.
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- This release adds support for parallel ptest execution with a ptest per image.
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This takes ptest execution time from 3.5 hours to around 45 minutes on the autobuilder.
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- Miscellaneous changes:
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- Supporting 64 bit dates on 32 bit platforms: several packages have been
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updated to pass Y2038 tests.
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- Many packages were updated to add large file support.
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