libjingle_peerconnection_java.jar is empty

[yhbaran]

After I build webrtc, libjingle_peerconnection_java.jar include only one java class(its name Empty.class). Why is it becomming empty ? I followed the steps below and I didn't get any errors. I use Ubuntu.

1.source android/build.sh
2.install_dependencies
3.get_webrtc
4.export WEBRTC_DEBUG=true
5.export WEBRTC_ARCH=armv7
6.prepare_gyp_defines &&
execute_build

[wuhao-ouyang]

I think it's supposed to be empty since related code should be migrated to peerconnection_java.jar