This layer provides support for the JVMs of the Eclipse Temurin Project for use with OpenEmbedded and/or Yocto Project build systems.

You are reading the main branch. It targets the OE-Core 6.x release series (wrynose and any later 6.x codenames). For earlier series, switch to the matching release branch (scarthgap for 5.x, kirkstone for 4.x, dunfell for 3.x).

Building a JVM from source takes a long time and maintaining patches/tests is a lot of effort. Eclipse Temurin binaries are JCK-certified and proven compatible with the Java specification.

• git://git.openembedded.org/openembedded-core
• git://git.openembedded.org/bitbake

If you're using Poky, you're already set up—just clone the branch matching your Yocto codename.

git clone -b <yocto-codename> https://github.com/lucimber/meta-openjdk-temurin.git
bitbake-layers add-layer meta-openjdk-temurin

The layer uses one git branch per OE-Core major version. Each branch officially supports the LTS (.0) release in its series and additionally declares compatibility with every other codename in the same major line, grouped by shared BitBake/OE-Core generation.

Non-LTS codename entries in LAYERSERIES_COMPAT_meta-openjdk-temurin are informal and untested, offered for user convenience. Primary support is focused on the LTS release in each major line.

• Minimal maintenance burden: Close alignment in BitBake/core component versions enables common patch reuse.
• Greater patch stability: Fewer divergent code paths across grouped releases.
• Clear support boundaries: Users of this layer understand which combinations are recommended vs. “use at your own risk.”
• Coherent branch structure: Each Git branch aligns with an LTS release and its compatible ecosystem.

See https://wiki.yoctoproject.org/wiki/Releases for a comprehensive list of Codenames.

Each feature version provides three recipes — all drawn from the same Eclipse Temurin binary matrix, so per-architecture availability is identical across them:

• openjdk-N-jre — Java Runtime Environment for the target
• openjdk-N-jdk — Java Development Kit for the target
• openjdk-N-jdk-native — Java Development Kit for the build host (for cross-compiling Java inside Yocto; see meta-openjdk-temurin/USAGE.md)

32-bit x86 is not supported — Adoptium does not publish Linux x86 Temurin builds.

Contributions are welcome under the included GPL - 2.0 license. By submitting a PR, you agree to the Developer Certificate of Origin:

By making a contribution to this project, I certify that:
a. The contribution was made by me under GPL-2.0 (or compatible).
b. If based on prior work, I have the right to submit it under GPL-2.0.
…
Signed-off-by: Your Name <you@example.com>

Either place Signed-off-by: ... into the last line of your commit message, or use the -s flag togther with the git commit command.

Eclipse Temurin is a trademark of the Eclipse Foundation. Eclipse, and the Eclipse Logo are registered trademarks of the Eclipse Foundation.

Java and all Java-based trademarks are trademarks of Oracle Corporation in the United States, other countries, or both.

meta-openjdk-temurin - A software layer as defined by the Yocto Project Layer Model.

Copyright (C) 2023 Lucimber UG

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

meta - openjdk - temurin is maintained by Lucimber UG, based on work from Eclipse Temurin and the Yocto/OpenEmbedded community.