>>> Emerging (2 of 4) dev-java/eclipse-ecj-3.1-r13 to /
>>> checking ebuild checksums ;-)
>>> checking auxfile checksums ;-)
>>> checking miscfile checksums ;-)
>>> checking eclipse-ecj-3.1-gentoo-r2.tar.bz2 ;-)
Traceback (most recent call last):
  File "/usr/bin/depend-java-query", line 85, in ?
    (options, args) = parser.parse_args()
  File "/usr/lib64/python2.4/optparse.py", line 1275, in parse_args
    stop = self._process_args(largs, rargs, values)
  File "/usr/lib64/python2.4/optparse.py", line 1315, in _process_args
    self._process_long_opt(rargs, values)
  File "/usr/lib64/python2.4/optparse.py", line 1390, in _process_long_opt
    option.process(opt, value, values, self)
  File "/usr/lib64/python2.4/optparse.py", line 707, in process
    return self.take_action(
  File "/usr/lib64/python2.4/optparse.py", line 726, in take_action
    self.callback(self, opt, value, parser, *args, **kwargs)
  File "/usr/bin/depend-java-query", line 49, in get_vm
    vm = verman.get_vm(value)
  File "/usr/share/java-config-2/pym/java_config/VersionManager.py", line 131, in get_vm
    raise Exception("Couldn't find suitable VM. Possible invalid dependency string.")
Exception: Couldn't find suitable VM. Possible invalid dependency string.
!!! ERROR: The active vm could not be found
!!! ERROR: The active vm could not be found
!!! ERROR: The active vm could not be found
!!! ERROR: The active vm could not be found
!!! ERROR: The active vm could not be found
!!! ERROR: The active vm could not be found
!!! ERROR: The active vm could not be found
Traceback (most recent call last):
  File "/usr/bin/depend-java-query", line 85, in ?
    (options, args) = parser.parse_args()
  File "/usr/lib64/python2.4/optparse.py", line 1275, in parse_args
    stop = self._process_args(largs, rargs, values)
  File "/usr/lib64/python2.4/optparse.py", line 1315, in _process_args
    self._process_long_opt(rargs, values)
  File "/usr/lib64/python2.4/optparse.py", line 1390, in _process_long_opt
    option.process(opt, value, values, self)
  File "/usr/lib64/python2.4/optparse.py", line 707, in process
    return self.take_action(
  File "/usr/lib64/python2.4/optparse.py", line 726, in take_action
    self.callback(self, opt, value, parser, *args, **kwargs)
  File "/usr/bin/depend-java-query", line 49, in get_vm
    vm = verman.get_vm(value)
  File "/usr/share/java-config-2/pym/java_config/VersionManager.py", line 131, in get_vm
    raise Exception("Couldn't find suitable VM. Possible invalid dependency string.")
Exception: Couldn't find suitable VM. Possible invalid dependency string.
!!! ERROR: The active vm could not be found
!!! ERROR: The active vm could not be found
!!! ERROR: The active vm could not be found
!!! ERROR: The active vm could not be found
!!! ERROR: The active vm could not be found
!!! ERROR: The active vm could not be found
!!! ERROR: The active vm could not be found
!!! ERROR: The active vm could not be found
 * Using:
>>> Unpacking source...
>>> Unpacking eclipse-ecj-3.1-gentoo-r2.tar.bz2 to /var/tmp/portage/eclipse-ecj-3.1-r13/work
Rewriting ./build.xml
>>> Source unpacked.
Traceback (most recent call last):
  File "/usr/bin/depend-java-query", line 85, in ?
    (options, args) = parser.parse_args()
  File "/usr/lib64/python2.4/optparse.py", line 1275, in parse_args
    stop = self._process_args(largs, rargs, values)
  File "/usr/lib64/python2.4/optparse.py", line 1315, in _process_args
    self._process_long_opt(rargs, values)
  File "/usr/lib64/python2.4/optparse.py", line 1390, in _process_long_opt
    option.process(opt, value, values, self)
  File "/usr/lib64/python2.4/optparse.py", line 707, in process
    return self.take_action(
  File "/usr/lib64/python2.4/optparse.py", line 726, in take_action
    self.callback(self, opt, value, parser, *args, **kwargs)
  File "/usr/bin/depend-java-query", line 49, in get_vm
    vm = verman.get_vm(value)
  File "/usr/share/java-config-2/pym/java_config/VersionManager.py", line 131, in get_vm
    raise Exception("Couldn't find suitable VM. Possible invalid dependency string.")
Exception: Couldn't find suitable VM. Possible invalid dependency string.
!!! ERROR: The active vm could not be found
!!! ERROR: The active vm could not be found
!!! ERROR: The active vm could not be found
!!! ERROR: The active vm could not be found
!!! ERROR: The active vm could not be found
!!! ERROR: The active vm could not be found
!!! ERROR: The active vm could not be found
>>> Compiling source in /var/tmp/portage/eclipse-ecj-3.1-r13/work/eclipse-ecj-3.1 ...
!!! ERROR: The active vm could not be found
usage: java-config [options]

Java Configuration Utility Version 2.0.22
Copyright 2004-2005 Gentoo Foundation
Distributed under the terms of the GNU General Public License v2
Please contact the Gentoo Java Herd <java@gentoo.org> with problems.

java-config-2: error: --classpath option requires an argument
Error: No JDK found!
Try using java-config script to set your JDK
Remember that you need a JDK not a JRE

!!! ERROR: dev-java/eclipse-ecj-3.1-r13 failed.
Call stack:
  ebuild.sh, line 1539:   Called dyn_compile
  ebuild.sh, line 939:   Called src_compile
  eclipse-ecj-3.1-r13.ebuild, line 25:   Called eant 'jar'
  java-utils-2.eclass, line 1200:   Called die

!!! eant failed
!!! If you need support, post the topmost build error, and the call stack if relevant.