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diff --git a/java/ecj-bootstrap/files/build.sh b/java/ecj-bootstrap/files/build.sh
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+#!/bin/sh
+# taken from eclipse.spec of
+# <fedora mirror>/fedora/core/5/source/SRPMS/eclipse-3.1.2-1jpp_13fc.src.rpm
+# for fedora mirror, please consult following site.
+# http://fedora.redhat.com/download/mirrors.html
+
+  # Bootstrapping is 3 parts:
+  # 1. Build ecj with gcj -C 
+  # 2. Build ecj with gcj-built ecj ("javac")
+  # 3. Re-build ecj with output of 2.
+  
+  # Unzip the "stable compiler" source into a temp dir and build it.
+  # Note:  we don't want to build the CompilerAdapter.
+
+  mkdir ecj-bootstrap-tmp
+  unzip -qq -d ecj-bootstrap-tmp jdtcoresrc/src/ecj.zip
+  rm -f ecj-bootstrap-tmp/org/eclipse/jdt/core/JDTCompilerAdapter.java
+
+  # 1a. Build ecj with gcj -C
+  cd ecj-bootstrap-tmp
+  for f in `find . -name '*.java' | cut -c 3-`; do
+    ${GCJ} -Wno-deprecated -C $f
+  done
+  find . -name '*.class' -or -name '*.properties' -or -name '*.rsc' |\
+      xargs ${JAR} cf ../ecj-bootstrap.jar
+  cd ..
+
+  # Delete our modified ecj and restore the backup
+  rm -rf ecj-bootstrap-tmp
+
+  # 1b. Natively-compile it
+
+  ${GCJ} -fPIC -fjni -findirect-dispatch -shared -Wl,-Bsymbolic -o ecj-bootstrap.jar.so ecj-bootstrap.jar
+ 
+  ${GCJDBTOOL} -n ecj-bootstrap.db 30000
+  ${GCJDBTOOL} -a ecj-bootstrap.db ecj-bootstrap.jar ecj-bootstrap.jar.so
+
+  # 2a. Build ecj
+  export CLASSPATH=ecj-bootstrap.jar:$ORIGCLASSPATH
+  export ANT_OPTS="-Dgnu.gcj.precompiled.db.path=`pwd`/ecj-bootstrap.db"
+  ${ANT} -Dbuild.compiler=gcj -buildfile jdtcoresrc/compilejdtcorewithjavac.xml
+
+  ${GCJ} -fPIC -fjni -findirect-dispatch -shared -Wl,-Bsymbolic \
+    -o jdtcoresrc/ecj.jar.so jdtcoresrc/ecj.jar
+   
+  ${GCJDBTOOL} -n jdtcoresrc/ecj.db 30000
+  ${GCJDBTOOL} -a jdtcoresrc/ecj.db jdtcoresrc/ecj.jar jdtcoresrc/ecj.jar.so
+
+  # Remove our gcj-built ecj
+  rm ecj-bootstrap.db ecj-bootstrap.jar ecj-bootstrap.jar.so
+
+  # To enSURE we're not using any pre-compiled ecj on the build system, set this
+  export ANT_OPTS="-Dgnu.gcj.precompiled.db.path=`pwd`/jdtcoresrc/ecj.db"
+
+  # 3. Use this ecj to rebuild itself
+  export CLASSPATH=`pwd`/jdtcoresrc/ecj.jar:$ORIGCLASSPATH
+  ${ANT} -Dbuild.compiler=gcj -buildfile jdtcoresrc/compilejdtcore.xml
+
+  # Natively-compile it
+  ${GCJ} -fPIC -fjni -findirect-dispatch -shared -Wl,-Bsymbolic \
+      -o ecj.jar.so ecj.jar
+  ${GCJDBTOOL} -n ecj.db 30000
+  ${GCJDBTOOL} -a ecj.db ecj.jar ecj.jar.so
+  export ANT_OPTS="-Dgnu.gcj.precompiled.db.path=`pwd`/ecj.db"
+  rm jdtcoresrc/ecj.db jdtcoresrc/ecj.jar.so
+
+  # Creating native executable
+  ${GCJ} -O2 -g -Wl,-Bsymbolic -fPIC -fjni -findirect-dispatch  --main=org.eclipse.jdt.internal.compiler.batch.Main -o ecj-bootstrap-gcj ecj.jar