Temurin-build: Placeholder for JRE image creation on Java 11+

[karianna]

$ make legacy-jre-image &&
build/linux-x86_64-normal-server-release/images/jre/bin/java --list-modules
Building target 'legacy-jre-image' in configuration
'linux-x86_64-normal-server-release'
Creating legacy jre image
Finished building target 'legacy-jre-image' in configuration
'linux-x86_64-normal-server-release'
make legacy-jre-image 9.82s user 2.09s system 145% cpu 8.183 total
java.base@12-internal
java.compiler@12-internal

[sxa]

Asking the question since it was asked by someone today: Do we still need to produce a JRE package if Oracle aren't producing one in a default openjdk build?

[don-vip]

Maintaining a JRE package should help Linux distributions maintainers, see http://mail.openjdk.java.net/pipermail/distro-pkg-dev/2018-July/039894.html

[alexhass]

If you create a build I can create the Windows MSI installer for JRE, too.

[j-christ]

@sxa555 Yes, a JRE is still needed. Many 3rd party tools expect a JRE but not necessarily a JDK.

[don-vip]

Even Oracle will finally provide a Server JRE for JDK 11, see https://twitter.com/DonaldOJDK/status/1044970153392427010

[karianna]

@johnoliver Can you give the instructions in the issue description a go for a Linux x86 Java 11 build and see if it just works out of the box?

[pbi-qfs]

Providing a Java-11 Desktop-JRE (as long as the build targets are available in the source) for download is substantial added value in comparison to what Oracle offers.

[karianna]

Fixed via #582, but waiting to see if we need to do more to add it to the API/site

[karianna]

Should go all the way through to the website and API, so closing for now, please raise a bug if that's not the case within the next few days.