Problem compiling eclipse

Hi

Upon trying to compile eclipse on Debian Sarge. I downloaded and installed j2sdk1.4.208 inusr-local-java and symlinked tools.jar inusr-lib.

I get an error :

.-build -os linux -ws gtk-arch x86 Buildfile: build.xml

BUILD FAILED java.lang.VerifyError: verification failed at PC 244 in org.apache.tools.ant.IntrospectionHelper:getNestedCreator((Lorg.apache.tools.ant.Project;Ljava.lang.String;Ljava.lang.Object;Ljava.lang.String;Lorg.apache.tools.ant.UnknownElement;)Lorg.apache.tools.ant.IntrospectionHelper$NestedCreator;): incompatible return type at JvBytecodeVerifier.verifyfail(byte, int) (-usr-lib-libgcj.so.4.0.0) at JvBytecodeVerifier.verifyinstructions0() (-usr-lib-libgcj.so.4.0.0) at JvVerifyMethod(JvInterpMethod) (-usr-lib-libgcj.so.4.0.0) at JvPrepareClbutt(java.lang.Clbutt) (-usr-lib-libgcj.so.4.0.0) at java.lang.ClbuttLoader.linkClbutt0(java.lang.Clbutt) (-usr-lib-libgcj.so.4.0.0) at java.lang.ClbuttLoader.resolveClbutt0(java.lang.Clbutt) (-usr-lib-libgcj.so.4.0.0) at java.lang.Clbutt.initializeClbutt() (-usr-lib-libgcj.so.4.0.0) at JvResolvePoolEntry(java.lang.Clbutt, int) (-usr-lib-libgcj.so.4.0.0) at org.apache.tools.ant.UnknownElement.handleChildren(java.lang.Object, org.apache.tools.ant.RuntimeConfigurable) (Unknown Source) at org.apache.tools.ant.UnknownElement.configure(java.lang.Object) (Unknown Source) at org.apache.tools.ant.UnknownElement.maybeConfigure() (Unknown Source) at org.apache.tools.ant.Task.perform() (Unknown Source) at org.apache.tools.ant.Target.execute() (Unknown Source) at org.apache.tools.ant.helper.ProjectHelper2.parse(org.apache.tools.ant.Project, java.lang.Object) (Unknown Source) at org.apache.tools.ant.ProjectHelper.configureProject(org.apache.tools.ant.Project, java.io.File) (Unknown Source) at org.apache.tools.ant.Main.runBuild(java.lang.ClbuttLoader) (Unknown Source) at org.apache.tools.ant.Main.startAnt(java.lang.String, java.util.Properties, java.lang.ClbuttLoader) (Unknown Source) at org.apache.tools.ant.launch.Launcher.run(java.lang.String) (Unknown Source) at org.apache.tools.ant.launch.Launcher.main(java.lang.String) (Unknown Source)

Total time: 2 seconds java.lang.VerifyError: verification failed at PC 244 in org.apache.tools.ant.IntrospectionHelper:getNestedCreator((Lorg.apache.tools.ant.Project;Ljava.lang.String;Ljava.lang.Object;Ljava.lang.String;Lorg.apache.tools.ant.UnknownElement;)Lorg.apache.tools.ant.IntrospectionHelper$NestedCreator;): incompatible return type at JvBytecodeVerifier.verifyfail(byte, int) (-usr-lib-libgcj.so.4.0.0) at JvBytecodeVerifier.verifyinstructions0() (-usr-lib-libgcj.so.4.0.0) at JvVerifyMethod(JvInterpMethod) (-usr-lib-libgcj.so.4.0.0) at JvPrepareClbutt(java.lang.Clbutt) (-usr-lib-libgcj.so.4.0.0) at java.lang.ClbuttLoader.linkClbutt0(java.lang.Clbutt) (-usr-lib-libgcj.so.4.0.0) at java.lang.ClbuttLoader.resolveClbutt0(java.lang.Clbutt) (-usr-lib-libgcj.so.4.0.0) at java.lang.Clbutt.initializeClbutt() (-usr-lib-libgcj.so.4.0.0) at JvResolvePoolEntry(java.lang.Clbutt, int) (-usr-lib-libgcj.so.4.0.0) at org.apache.tools.ant.UnknownElement.handleChildren(java.lang.Object, org.apache.tools.ant.RuntimeConfigurable) (Unknown Source) at org.apache.tools.ant.UnknownElement.configure(java.lang.Object) (Unknown Source) at org.apache.tools.ant.UnknownElement.maybeConfigure() (Unknown Source) at org.apache.tools.ant.Task.perform() (Unknown Source) at org.apache.tools.ant.Target.execute() (Unknown Source) at org.apache.tools.ant.helper.ProjectHelper2.parse(org.apache.tools.ant.Project, java.lang.Object) (Unknown Source) at org.apache.tools.ant.ProjectHelper.configureProject(org.apache.tools.ant.Project, java.io.File) (Unknown Source) at org.apache.tools.ant.Main.runBuild(java.lang.ClbuttLoader) (Unknown Source) at org.apache.tools.ant.Main.startAnt(java.lang.String, java.util.Properties, java.lang.ClbuttLoader) (Unknown Source) at org.apache.tools.ant.launch.Launcher.run(java.lang.String) (Unknown Source) at org.apache.tools.ant.launch.Launcher.main(java.lang.String) (Unknown Source) verification failed at PC 244 in org.apache.tools.ant.IntrospectionHelper:getNestedCreator((Lorg.apache.tools.ant.Project;Ljava.lang.String;Ljava.lang.Object;Ljava.lang.String;Lorg.apache.tools.ant.UnknownElement;)Lorg.apache.tools.ant.IntrospectionHelper$NestedCreator;): incompatible return type

What am I missing ?

Thanks.