On Mon, Mar 13, 2017 at 9:32 PM Jonah Graham <[email protected]> wrote:

> Are there any examples of any project's HIPP config that does this? I
> assume I need to set up a tycho configuration that builds with Java 8 but
> runs tests with Java 9.
>
> You can do this locally or on Hudson. A Java 9 VM is installed on Hudson (bug
> 469515 <https://bugs.eclipse.org/bugs/show_bug.cgi?id=469515>).
>
I'm not sure that installed Java 9 is usable by projects other than
Platform - bug 469515 states this and
https://hudson.eclipse.org/platform/job/Generate-jdeps-report-using-java-9/
uses location that doesn't look to be accessible by others, at least it
didn't worked for me.

But principle is correct: create toolchains.xml pointing to Java 9 and
instruct Tycho to use it (
https://eclipse.org/tycho/sitedocs/tycho-surefire/tycho-surefire-plugin/test-mojo.html#useJDK
)
instead of the one that executes Maven. We are using this in Travis to run
build with Java 8, but some tests with Java 7 -  see
https://github.com/eclipse/eclemma/commit/37c744f2773f8914048149f776398a287e068ecb

HTH,
Evgeny
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