Procfs in Jail on fresh install of openjdk6

[Horst Leitenmueller]

hi Greg, 

i have a question regarding the hint that procfs must be enabled on openjdk6

if this is already mounted before installation of openjdk6 the build fails with:

gmake[2]: Entering directory `/s/portbuild/usr/ports/java/openjdk6/work/langtools/make'
JAVA_HOME=/usr/local/diablo-jdk1.6.0 ANT_OPTS=-Djava.io.tmpdir='/s/portbuild/usr/ports/java/openjdk6/work/build/bsd-amd64/langtools/build/ant-tmp' /s/portbuild/usr/ports/java/openjdk6/work/apache-ant-1.8.2/bin/ant -Djdk.version=1.6.0_30 -Dfull.version='1.6.0_30-b24'  -Drelease=1.6.0_30 -Dbuild.number=b24 -Djavac.target=5 -Dboot.java.home=/usr/local/diablo-jdk1.6.0 -Dbuild.dir=/s/portbuild/usr/ports/java/openjdk6/work/build/bsd-amd64/langtools/build -Ddist.dir=/s/portbuild/usr/ports/java/openjdk6/work/build/bsd-amd64/langtools/dist build
Error: could not find libjava.so
Error: could not find Java 2 Runtime Environment.
gmake[2]: *** [build] Error 2
gmake[2]: Leaving directory `/s/portbuild/usr/ports/java/openjdk6/work/langtools/make'
gmake[1]: *** [langtools-build] Error 2
gmake[1]: Leaving directory `/s/portbuild/usr/ports/java/openjdk6/work'
gmake: *** [build_product_image] Error 2
*** Error code 1

Stop in /usr/ports/java/openjdk6.
*** Error code 1


diablo-jdk1.6 is installed (with the openjdk port) but you can't call java --version (on commandline) for example

can you please explain if this is a feature or a bug; and when the procfs must be enabled ?

if i disable the procfs build is running through (java --version for diablo running normal, and also openjdk), 
afterwards enabling does not change functionality of java, it works without problems...

br horst