After JDK-8150044 classlists get generated at build-time. It uses the -Xshare:dump switch for doing this, but that option is not supported for all JVM variants. There should be a configure option to disable this.

This currently breaks JDK 9 image builds using the Zero JVM variant:
Generating lib/classlist
/home/sgehwolf/Documents/openjdk/upstream-sources/openjdk9-hs-pristine/build/linux-x86_64-normal-zero-release/support/interim-image/bin/java -XX:DumpLoadedClassList=/home/sgehwolf/Documents/openjdk/upstream-sources/openjdk9-hs-pristine/build/linux-x86_64-normal-zero-release/support/classlist/classlist.tmp \
    -cp /home/sgehwolf/Documents/openjdk/upstream-sources/openjdk9-hs-pristine/build/linux-x86_64-normal-zero-release/support/classlist.jar \
    build.tools.classlist.HelloClasslist 2>&1
hello
world!
from:
localhost/127.0.0.1
May 19, 2016 2:51:40 PM build.tools.classlist.HelloClasslist main
INFO: New Date: 2016-05-19T12:51:40.73984 - old: 2016 May 19

/home/sgehwolf/Documents/openjdk/upstream-sources/openjdk9-hs-pristine/build/linux-x86_64-normal-zero-release/support/interim-image/bin/java -XX:DumpLoadedClassList=/home/sgehwolf/Documents/openjdk/upstream-sources/openjdk9-hs-pristine/build/linux-x86_64-normal-zero-release/support/classlist/classlist \
    -Xshare:dump -XX:SharedClassListFile=/home/sgehwolf/Documents/openjdk/upstream-sources/openjdk9-hs-pristine/build/linux-x86_64-normal-zero-release/support/classlist/classlist.tmp 2>&1
Error occurred during initialization of VM
Cannot dump shared archive when UseCompressedOops or UseCompressedClassPointers is off.
GenerateClasslist.gmk:60: recipe for target '/home/sgehwolf/Documents/openjdk/upstream-sources/openjdk9-hs-pristine/build/linux-x86_64-normal-zero-release/support/classlist/classlist' failed
gmake[3]: *** [/home/sgehwolf/Documents/openjdk/upstream-sources/openjdk9-hs-pristine/build/linux-x86_64-normal-zero-release/support/classlist/classlist] Error 1
gmake[3]: Leaving directory '/home/sgehwolf/Documents/openjdk/upstream-sources/openjdk9-hs-pristine/jdk/make'
make/Main.gmk:373: recipe for target 'generate-classlist' failed
gmake[2]: *** [generate-classlist] Error 1
gmake[2]: *** Waiting for unfinished jobs....