OpenJDK 10 zero For Mips32el java -version IncompatilveClassChangeError

[William Larson]

Hello David,

I copied everything under

build/linux-mipsel-normal-zero-release/images/jdk

Got error

I then tried just


build/linux-mipsel-normal-zero-release/images/jre

Got the error
I even copied

build/linux-mipsel-normal-zero-release/images/jmods

Along side jre and jdk

Still got the error

I copied: (note the image folder is missing)
This is a much much bigger folder

build/linux-mipsel-normal-zero-release/jdk

To the target and it works albeit very slowly.

I just want the jre ideally.

Thanks for the help,

Will

On Thu, Jun 4, 2020, 7:12 PM David Holmes <david.holmes at oracle.com> wrote:

> Hi William,
>
> On 5/06/2020 10:00 am, William Larson wrote:
> > Hello,
> > I was able to successfully compile/build OpenJDK 10 with following
> configure
> >
> > bash configure
> > --openjdk-target=mipsel-oe-linux
> > --with-sysroot=/usr/local/oecore-i686/sysroots/mips32el-nf-oe-linux
> >
> --with-toolchain-path=/usr/local/oecore-i686/sysroots/i686-oesdk-linux/usr/bin/mipsel-oe-linux
> >
> --with-libffi=/usr/local/oecore-i686/sysroots/mips32el-nf-oe-linux/usr/src/debug/libffi/3.0.13-r0/libffi-3.0.13
> >
> > --with-jvm-variants=zero
> > --with-build-jdk=./jdk9/build/buildjdk/jdk
> > --with-boot-jdk=./jdk9/build/buildjdk/jdk
> >
> > I applied this patch to OpenJDK 10 as mips has 128 signals not 64
> >
> https://groups.google.com/forum/#!topic/linux.debian.bugs.dist/Tmgse0HIzDc
> >
> > I also Reference this mail from Magnus
> >
> https://mail.openjdk.java.net/pipermail/build-dev/2019-January/024735.html
> >
> > Where he suggests using a boot JDK
> >
> > CONF=linux-mipsel-normal-zero-release make images
> >
> > Works
> >
> > However if i copy the images to my QEMU based on the same sysroot and
> > compiler above I get
> >
> > ./java -version
> > Error occurred during initialization of boot layer
> > java.lang.IncompatibleClassChangeError: Implementing class
> >
> > If I copy the JDK folder just outside of images folder
> > (build/linux-mipsel-normal-zero-release/jdk) it works OK albeit it takes
> a
> > LONG time to print
>
> That is not part of the image built by "make images", it is what is
> called the exploded image. So I'm not clear exactly what you copied
> which did not work? Was it everything under
>
> build/linux-mipsel-normal-zero-release/images/jdk
>
> ?
>
> Cheers,
> David
>
> > ./java -version
> > openjdk version "10-internal"
> > OpenJDK Runtime Environment (build 10-internal+0-adhoc.will.jdk10)
> > OpenJDK Zero VM (build 10-internal+0-adhoc.will.jdk10, interpreted mode)
> >
> > Why is does
> > CONF=linux-mipsel-normal-zero-release make images
> > not work?
> >
>