OpenJDK 10 zero For Mips32el java -version IncompatilveClassChangeError

[David Holmes]

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?
>