Re: [epp-dev] JustJ JRE for AArch64

[Ed Merks <ed.merks@xxxxxxxxx>]

Thanks to Sravan Lakkimsetti for the awesomely proactive help, thanks to Gordon Hollingworth of Raspberry Pi for providing access to aarch64 hardware, and thanks to Mikaël Barbero for hooking it up to the JustJ CI instance,  we now have JustJ JREs for Linux aarch64 available.

The p2 update site for these Java 15.0.1 JREs are available here:

  https://download.eclipse.org/justj/jres/15/updates/milestone/latest

The non-debug-stripped variants of these JREs include a src.zip so JDT supports source debugging using these JREs, thanks to the contributions of Alex Boyko.

I've built sample products, effectively the Eclipse SDK, version 4.18, with JustJ 15.0.1 and Oomph included:

  https://download.eclipse.org/justj/www/download.eclipse.org.php?file=sample-products/202010270600

So I've been able to test that the Eclipse SDK works properly on Windows, i.e., that JDT can debug step into JustJ JRE libraries and see the sources automatically.  Also note that the generation of the JREs actually launches Eclipse with that JRE, so each JRE has minimally been tested to confirm that Eclipse does launch using that JRE on each operating system and hardware combination.

I would suggest using https://download.eclipse.org/justj/jres/15/updates/milestone/latest for the next EPP milestone.  I'll produce a released version of these after the next EPP milestone has tested them on all platforms.

Regards,
Ed

On 26.10.2020 05:50, Ed Merks wrote:

> I see
>       that the EPP packages now include aarch64 variants:
>       
>       
>         https://www.eclipse.org/downloads/packages/release/2020-12/m1
>       
>       
>       The Java 15 JDK also supports aarch64:
>       
>       
> https://download.java.net/java/GA/jdk15.0.1/51f4f36ad4ef43e39d0dfdbaf6549e32/9/GPL/openjdk-15.0.1_linux-aarch64_bin.tar.gz
>       
>       
>       This Bugzilla asks JustJ to provide support for aarch64:
>       
>       
>         https://bugs.eclipse.org/bugs/show_bug.cgi?id=566640
>       
>       
>       Without that support, the aarch64 EPP packages that include a
>       JustJ JRE will not actually contain a fragment with an actual JRE.
>       
>       
>       Making this work primarily involves making this script work
>       natively on aarch64:
>       
>       
> https://git.eclipse.org/c/justj/justj.git/tree/releng/org.eclipse.justj.releng/build-jre.sh
>       
>       
>       But I cannot test how to implement that locally.
>       
>       
>       Ultimately the JustJ ci instance will need yet another dedicated
>       agent/executor:
>       
>       
>         https://ci.eclipse.org/justj/
>       
>       
>       I don't see any mention of aarch64 here:
>       
>       
>         https://wiki.eclipse.org/CBI#What.27s_provided.3F
>       
>       
>       An additional dedicated agent costs one "resource pack", so I will
>       need to hunt down someone to donate yet another resource pack.
>       
>       
> https://docs.google.com/spreadsheets/d/e/2PACX-1vQGhAH2b-BdoW5MAgmCG8NLfAjZMe7fIgsYNtUMREmIeAXmAPjDkZOx1OHaz0-INS51TGN41C3zcbI8/pubhtml?gid=746314272&single=true
>       
>       
>       The two current dedicated agents (for MacOS and Windows) are
>       sponsored by Deutsches Zentrum fuer Luft- und Raumfahrt:
>       
>       
> https://docs.google.com/spreadsheets/d/e/2PACX-1vQGhAH2b-BdoW5MAgmCG8NLfAjZMe7fIgsYNtUMREmIeAXmAPjDkZOx1OHaz0-INS51TGN41C3zcbI8/pubhtml?gid=832654757&single=true
>       
>       
>       Assuming such an agent type exists, I've asked for one:
>       
>       
>         https://bugs.eclipse.org/bugs/show_bug.cgi?id=568233
>       
>       
>       But the more fundamental question is, does anyone care?  And even
>       more fundamentally, does any one care enough to contribute?  I
>       don't actually personally care about aarch64.
>       
>       
>       Regards,
>       
>       Ed
>       
>       
>