This layer provides support for Java for use with OpenEmbedded and/or Yocto Project build systems.

This layer depends on:

• openembedded-core

  • URI: git://git.openembedded.org/openembedded-core
  • branch: master

• meta-oe

  • URI: git://git.openembedded.org/meta-openembedded
  • sub-layer: meta-oe
  • branch: master

Furthermore for oeqa runtime testing this layer also depends on:

• meta-poky
  • URI: git://git.yoctoproject.org/poky
  • sub-layer: meta-poky
  • branch: master

For use with a specific Yocto Project release please refer to the corresponding git branches.

Guides on how to contribute to meta-java are described in CONTRIBUTING.md.

The meta-java layer may be tested using oeqa's runtime image tests. The easiest way is to add the following configuration to your local.conf:

SANITY_TESTED_DISTROS = ""
INHERIT += "testimage"
TESTIMAGE_AUTO = "1"

Then you should be able to use the open{jre,jdk}-{7,8}-test-image recipes. Furthermore you could also include the tests provided in lib/oeqa/runtime/cases into your test image. More information on image testing is available at:

https://wiki.yoctoproject.org/wiki/Image_tests

• OpenJDK-7 doesn't support musl based images
• Both, OpenJDK-7 and 8 doesn't support mips and mips64 machines
• Further limitations are shown in the OpenJDK version/libc/target architecture support matrix below.

If you encounter any other problems or bugs please report them to our mailing list at [email protected].

You should define at least the following variables in a distro include file or local.conf

# Possible provider: cacao-initial-native and jamvm-initial-native
PREFERRED_PROVIDER_virtual/java-initial-native = "cacao-initial-native"

# Possible provider: cacao-native and jamvm-native
PREFERRED_PROVIDER_virtual/java-native = "jamvm-native"

# Optional since there is only one provider for now
PREFERRED_PROVIDER_virtual/javac-native = "ecj-bootstrap-native"

Simply rely on openjdk-7-jre, openjdk-7, openjdk-8 or openjre-8.

For conf/bblayers.conf you have to add

BBLAYERS ?= " \
   ...
  path_to_source/meta-openembedded/meta-oe \
  path_to_source/sources/meta-java \
  "

• gcc >= v6
• libstdc++ static