OpenJDK 10 zero For Mips32el java -version IncompatilveClassChangeError

[William Larson]

Hello David,

When running configure
--with-buildjdk=./jdk/build/linux-x86_64-normal-server-release/jdk

I get the following error

configure: Potential Build JDK found at
/opt/FaceClockJava/jdk10l/build/linux-x86_64-normal-server-release/jdk is
incorrect JDK version (openjdk version "10-internal"); ignoring
configure: (Your Build JDK must be version 9)
checking for Build JDK... no
configure: error: Could not find a suitable Build JDK
configure exiting with result code 1

How do I build with buildjdk10 when it's asking for 9?


On Thu, Jun 4, 2020, 9:16 PM David Holmes <david.holmes at oracle.com> wrote:

> William,
>
> You need a JDK 10 build JDK not JDK 9 - as Mikael already stated and as
> Magnus wrote:
>
> "When we cross-compile, we need not only a Boot JDK (of version current
> N-1) running on the build host platform, but we also need a Build JDK,
> based on the current source code, running on the build host. (This is
> for running jmod/jlink; it needs to be up to date)."
>
> With your JDK 9 build JDK you are getting invalid jmod/jlink output
> files that prevent the full image from executing. But the exploded image
> that doesn't use all of those and so may execute okay.
>
> David
>
> On 5/06/2020 12:22 pm, William Larson wrote:
> > 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
> > <mailto: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?
> >      >
> >
>