ant警告 “warning: 'includeantruntime' was not set” 问题查找

问题：

 把

<target name="compile" depends="init">
<javac srcdir="${src}" destdir="${dest}" />

</target>

加上 includeantruntime="on"

<target name="compile" depends="init">
  <javac srcdir="${src}" destdir="${dest}" includeantruntime="on" />

</target>