Ant问题：warning: 'includeantruntime' was not set

问题:

compile:
    [javac]E:workspacewebAdminbuild.xml:28: warning: 'includeantruntime' was not set,defaulting to build.sysclasspath=last; set to false for repe
atable builds
    [javac]Compiling 1 source file toE:workspacewebAdminbuildWEB-INFclasses

BUILD SUCCESSFUL
Total time: 1 second

解决：

 改为

includeantruntime="on"/>

答案参考于网络。谢谢同仁。