Installing Java runtime on STM32MP157C-DK2

[Puranjay Mohan]

I see that the page related to the installation on java is still under construction on the wiki, but I urgently want to install jre and want help in doing so.

I am using st-example-image-qt for my project and I need to add java to it, I have already added other packages like python, etc. using the IMAGE_INSTALL_append = python3, but when I add openjdk-7-jre in it after adding the meta-java layer, it gives an error that x11 is required in DISTRO_FEATURES.

Please help me fix this.

Thanks and Regards

[Olivier GALLIEN]

Hi @Puranjay Mohan​ ,

Yes wiki page is currently in final review process and should be public very soon.

In the meantime, find below extract of main info :

JAVA for Linux-based system for embedded system is available as a meta data in Yocto project.

• Clone following git repository into [your STM32MP1 Distribution path]/layers/meta-st/""

 PC >git clone git://git.yoctoproject.org/meta-java

Depending on the Yocto release, select the right branch. (example : branch dunfell for the ecosystem release v2.0.0 

The last commit tested is cf9604a4789801d9dfb0cb8ca134ff04b42ae161 : openjdk-8: remove -Werror

PC $>cd meta-java
PC $>git checkout remotes/origin/dunfell 

If not done, setup your build environment:

PC $> cd [your STM32MP1 Distribution path]
PC $> source ./meta-st/script/envsetup.sh 
(Select for the DISTRO openstlinux-weston and for MACHINE stm32mp1)

Add the meta layer in your yocto environment :

PC $> cd [your STM32MP1 Distribution path]/build-openstlinuxweston-stm32mp1
PC $> bitbake-layers add-layer [your STM32MP1 Distribution path]/meta-st/meta-java

Define at least the following variables in your local.conf file.

([your STM32MP1 Distribution path]/build-openstlinuxweston-stm32mp1/conf/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"

Include in your image the openjdk-8 component

PC $> cd [your STM32MP1 Distribution path]/meta-st/meta-st-openstlinux/recipes-st/images

Edit the file st-image-weston.bb and add the following line under CORE_IMAGE_EXTRA_INSTALL

 openjdk-8 \
 openjdk-8-demo \

Build the image

PC $> cd [your STM32MP1 Distribution path]/build-openstlinuxweston-stm32mp1
PC $> bitbake st-image-weston

Hope it help,

Olivier