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Re: [jakarta.ee-community] targeting JDK 8 *and* JDK 11?
That's an interesting question, there is no real Maven support, but for only 2 separate JDKs, the way we build the JSR 385 API should work: https://github.com/unitsofmeasurement/unit-api

In the Indriya RI I started to experiment with a Maven Multi Version JAR plug in, but that seems incompatible with OSGI meta information (it won't put it there or overwrite those by other plug-ins) and it had a tendency to duplicate the entire codebase instead of just a few classes that are different.

Maven AntRun seems more reliable at least for 2 JDKs. I have not tried e.g. 8, 11 and say 13, but would be happy to help explore this if Jakarta EE has a need for it. 

Werner 

Carlos Chacín <cchacin@xxxxxxxxx> schrieb am Do., 19. Sep. 2019, 07:55:
I am looking for the same setup since the things that I checked so far are way complicated.

It would be great to put in place some examples, and I'm happy to help but I honestly don't know how to make a clear configuration for it. 

Carlos Chacin

Senior SDE

On Wed, Sep 18, 2019, 5:33 PM Bill Shannon <bill.shannon@xxxxxxxxxx> wrote:
What's the state of the art for building a jar file that contains class
files that will work on JDK 8, and a module-info.class that will work
on JDK 11?  The last time I looked at this all I found were kludges
that resulted in compiling everything twice, or very complex Maven
configurations that depended on using multiple versions of the JDK
to compile.  Is there a better way?  Is there an existing project
that would be a good example?
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