2.4/build-tools/customchecks/build.xml

<project name="customchecks" default="build" basedir=".">
  <property name="gwt.root" location="../.." />
  <property name="project.tail" value="build-tools/customchecks" />
  <import file="${gwt.root}/common.ant.xml" />

  <target name="compile" description="Compiles this project">
    <mkdir dir="${javac.out}" />
    <gwt.javac>
      <classpath>
        <pathelement location="${gwt.tools.antlib}/checkstyle-all-4.2.jar" />
      </classpath>
    </gwt.javac>
  </target>

  <target name="build" depends="compile" description="Packages this project into a jar">
    <mkdir dir="${gwt.build.lib}" />
    <gwt.jar>
      <fileset dir="src" />
      <fileset dir="${javac.out}" />
    </gwt.jar>
  </target>

  <target name="checkstyle">
    <!-- NOTE: This project doesn't have the checkstyle rule since it participates in bootstrapping. -->
  </target>

  <target name="clean" description="Cleans this project's intermediate and output files">
    <delete dir="${project.build}" />
    <delete file="${project.lib}" />
  </target>

</project>