* Using: sun-jdk-1.6
>>> Unpacking source...
>>> Unpacking lucene-2.4.0-src.tar.gz to /var/tmp/portage/dev-java/lucene-2.4.0/work
>>> Source unpacked in /var/tmp/portage/dev-java/lucene-2.4.0/work
>>> Compiling source in /var/tmp/portage/dev-java/lucene-2.4.0/work/lucene-2.4.0 ...
Rewriting attributes
Rewriting ./common-build.xml
Rewriting ./build.xml
 * Using following ANT_TASKS: ant-nodeps javacc
Buildfile: build.xml

clean-javacc:

javacc-uptodate-check:

javacc-notice:
     [echo] 
     [echo]       One or more of the JavaCC .jj files is newer than its corresponding
     [echo]       .java file.  Run the "javacc" target to regenerate the artifacts.
     [echo]     

jflex-uptodate-check:

jflex-notice:

init:

javacc-check:

javacc-QueryParser:
   [javacc] Java Compiler Compiler Version 4.2 (Parser Generator)
   [javacc] (type "javacc" with no arguments for help)
   [javacc] Reading from file /var/tmp/portage/dev-java/lucene-2.4.0/work/lucene-2.4.0/src/java/org/apache/lucene/queryParser/QueryParser.jj . . .
   [javacc] File "TokenMgrError.java" does not exist.  Will create one.
   [javacc] File "ParseException.java" does not exist.  Will create one.
   [javacc] File "Token.java" does not exist.  Will create one.
   [javacc] File "CharStream.java" does not exist.  Will create one.
   [javacc] Parser generated successfully.

javacc-HTMLParser:
   [javacc] Java Compiler Compiler Version 4.2 (Parser Generator)
   [javacc] (type "javacc" with no arguments for help)
   [javacc] Reading from file /var/tmp/portage/dev-java/lucene-2.4.0/work/lucene-2.4.0/src/demo/org/apache/lucene/demo/html/HTMLParser.jj . . .
   [javacc] Warning: Line 22, Column 3: Bad option name "OPTIMIZE_TOKEN_MANAGER".  Option setting will be ignored.
   [javacc] File "TokenMgrError.java" does not exist.  Will create one.
   [javacc] File "ParseException.java" does not exist.  Will create one.
   [javacc] File "Token.java" does not exist.  Will create one.
   [javacc] File "SimpleCharStream.java" does not exist.  Will create one.
   [javacc] Parser generated with 0 errors and 1 warnings.

javacc:

BUILD SUCCESSFUL
Total time: 1 second
 * Disabling all optional ANT_TASKS
Buildfile: build.xml

javacc-uptodate-check:

javacc-notice:

jflex-uptodate-check:

jflex-notice:

init:

clover.setup:

clover.info:
     [echo] 
     [echo]       Clover not found. Code coverage reports disabled.
     [echo]   	

clover:

common.compile-core:
    [mkdir] Created dir: /var/tmp/portage/dev-java/lucene-2.4.0/work/lucene-2.4.0/build/classes/java
    [javac] Compiling 330 source files to /var/tmp/portage/dev-java/lucene-2.4.0/work/lucene-2.4.0/build/classes/java

compile-core:
     [rmic] RMI Compiling 1 class to /var/tmp/portage/dev-java/lucene-2.4.0/work/lucene-2.4.0/build/classes/java

jar-core:
      [jar] Building jar: /var/tmp/portage/dev-java/lucene-2.4.0/work/lucene-2.4.0/build/lucene-core-2.4.0.jar
      [jar] Manifest is invalid: The attribute "POOL DEBUG" may not occur more than once in the same section

BUILD FAILED
/var/tmp/portage/dev-java/lucene-2.4.0/work/lucene-2.4.0/common-build.xml:193: The following error occurred while executing this line:
/var/tmp/portage/dev-java/lucene-2.4.0/work/lucene-2.4.0/common-build.xml:263: Invalid Manifest: /var/tmp/portage/dev-java/lucene-2.4.0/work/lucene-2.4.0/build/MANIFEST.MF

Total time: 6 seconds
 * 
 * ERROR: dev-java/lucene-2.4.0 failed.
 * Call stack:
 *               ebuild.sh, line   49:  Called src_compile
 *             environment, line 4298:  Called eant '-Dversion=2.4.0' 'jar-core' 'jar-demo'
 *             environment, line  914:  Called die
 * The specific snippet of code:
 *       ant ${antflags} "${@}" || die "eant failed"
 *  The die message:
 *   eant failed
 * 
 * If you need support, post the topmost build error, and the call stack if relevant.
 * A complete build log is located at '/var/tmp/portage/dev-java/lucene-2.4.0/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/dev-java/lucene-2.4.0/temp/environment'.
 * 
!!! When you file a bug report, please include the following information:
GENTOO_VM=sun-jdk-1.6  CLASSPATH="" JAVA_HOME="/opt/sun-jdk-1.6.0.16"
JAVACFLAGS="-source 1.4 -target 1.4" COMPILER="javac"
and of course, the output of emerge --info