Bugzilla Bug 44804

Starting Ant with the lib option to specify a path to search for jars and
classes isn't working in 1.6.1. 

The problem is in the /usr/bin/ant script, because ant is started by running
Ant's traditional entry point.

[snip from ant manual: http://ant.apache.org/manual/running.html#viajava]
Ant can be started with two entry points:
- java -Dant.home=c:\ant org.apache.tools.ant.Main [options] [target]
- java -Dant.home=c:\ant org.apache.tools.ant.launch.Launcher [options]
[target]

The first method runs Ant's traditional entry point. The second method uses the
Ant Launcher introduced in Ant 1.6. The former method does not support the -lib
option and all required classes are loaded from the CLASSPATH. You must ensure
that all required jars are available. At a minimum the CLASSPATH should
include:

    * ant.jar and ant-launcher.jar
    * jars/classes for your XML parser
    * the JDK's required jar/zip files

The latter method supports the -lib option and will load jars from the
specified ANT_HOME. You should start the latter with the most minimal classpath
possible, generally just the ant-launcher.jar. 
[snip end]

Library Directories in Ant 1.6:
http://ant.apache.org/manual/running.html#libs

so i changed some lines of the gentoo-ant script to get it (for me) working:
- removed the hardcoded classpath
- starting ant using the new entrypoint

#! /bin/bash

#   Copyright (c) 2001-2003 The Apache Software Foundation.  All rights
#   reserved.
#   Edited for Gentoo Linux
#   $Header: /home/cvsroot/gentoo-x86/dev-java/ant/files/1.6.1/ant,v 1.1
2004/03/11 02:35:50 zx Exp $

if [ -f $HOME/.gentoo/java-env ] ; then
  source $HOME/.gentoo/java-env
else
  JAVA_HOME=`java-config --jdk-home`
  CLASSPATH=`java-config --classpath`:${CLASSPATH}
fi

if [ -z $JAVA_HOME ] ; then
  echo "Error: No JDK found!"
  echo "Try using java-config script to set your JDK"
  echo "Remember that you need a JDK not a JRE"
  exit 1
fi

# load system-wide ant configuration
if [ -f "/etc/ant.conf" ] ; then 
  . /etc/ant.conf
fi

# provide default values for people who don't use RPMs
if [ -z "$rpm_mode" ] ; then
  rpm_mode=false;
fi
if [ -z "$usejikes" ] ; then
  usejikes=false;
fi

# load user ant configuration
if [ -f "$HOME/.antrc" ] ; then 
  . "$HOME/.antrc"
fi

ANT_HOME=/usr/share/ant

# set ANT_LIB location
ANT_LIB="${ANT_HOME}/lib"

JAVACMD="`java-config --java`"

if [ ! -x "$JAVACMD" ] ; then
  echo "Error: JAVA_HOME is not defined correctly."
  echo "  We cannot execute $JAVACMD"
  exit 1
fi

# copied from original ant script
if [ -z "$LOCALCLASSPATH" ] ; then
    LOCALCLASSPATH=$ANT_LIB/ant-launcher.jar
else
    LOCALCLASSPATH=$ANT_LIB/ant-launcher.jar:$LOCALCLASSPATH
fi

if [ -n "$JAVA_HOME" ] ; then
  if [ -f "$JAVA_HOME/lib/tools.jar" ] ; then
    LOCALCLASSPATH="$LOCALCLASSPATH:$JAVA_HOME/lib/tools.jar"
  fi

  if [ -f "$JAVA_HOME/lib/classes.zip" ] ; then
    LOCALCLASSPATH="$LOCALCLASSPATH:$JAVA_HOME/lib/classes.zip"
  fi

else
  echo "Warning: JAVA_HOME environment variable is not set (or not exported)."
  echo "  If build fails because sun.* classes could not be found"
  echo "  you will need to set the JAVA_HOME environment variable"
  echo "  to the installation directory of java."
  echo "  Try using java-config script"
fi

# Allow Jikes support (off by default)
if $usejikes; then
  ANT_OPTS="$ANT_OPTS -Dbuild.compiler=jikes"
fi

# 2002-11-02, karltk@gentoo.org:
# The Blackdown JDK on PPC hiccups with native threads
#
if [ "`arch`" == "ppc" ] ; then
        export THREADS_FLAG="green"
fi

# copied from original ant script
"$JAVACMD" $ANT_OPTS -classpath "$LOCALCLASSPATH" -Dant.home="${ANT_HOME}"
org.apache.tools.ant.launch.Launcher $ANT_ARGS -lib "$CLASSPATH" "$@"


ciao, tom.

Reproducible: Always
Steps to Reproduce:
1. ant -lib /home/ant/extras

Actual Results:  
The Ant help text appears.

Expected Results:  
Seraching for extra libaries in the specified directory and starting the build
process.

without jikes (USE="-jikes")

Thanks, fixed in portage ;)