Compile JRE for PPC 32 bit

[Radu Andritoiu]

Hello,

I need to compile a working (java compatible) JRE for Power PC 32 bit.
I need the JRE to have the fix for RMI vulnerability (
https://access.redhat.com/security/cve/cve-2017-3241).
So I thought to try compiling jdk8u162-b01 revision.

I am building on a x86 Ubuntu and using a cross-compiler.
Do you recommend trying to do a compiling it directly on the PPC 32 machine?

What jvm-variant should I compile?
I understood that the "zero" variant is the only one that can be
cross-compiled to run on PPC32, but it is an interpreter only and needs
this patch (
http://bazaar.launchpad.net/~openjdk/openjdk/openjdk8/view/head:/debian/patches/hotspot-powerpcspe.diff)
that makes is not java compatible.

What target should I compile?
I managed to cross-compile only "hotspot" but this only gives me the JVM. I
think in order to get the rest of the JRE I need to cross-compile "jdk"
target, and this one gives me a lot of errors.

Do you think I should give up on cross-compiling jdk8u162 and try compiling
an older version and manually port the RMI fix?
What jdk version/revision can be compiled for PPC32 with at least the
"client" target, not only for "zero"?

Please, can you help me.


Thank you very much in advance,
Radu