Detecting jikes compiler

[LEVERETT,PAUL (HP-Roseville,ex1)]

I'm trying to detect the Jikes compiler and have the build process use it
only if it's available.  The following setting doesn't seem to work:


<property environment="system_prop." />

<target name="check_for_optional_packages">
  <property name="jikes.compiler" value="${system_prop.PATH}/jikes.exe"/>
  <available file="${jikes.compiler}" property="build.compiler"
value="jikes"/>
</target>

Can anyone point out the problem?

Thanks,
Paul