JNI binaries not included in JAR

I'm building javacv(http://code.google.com/p/javacv/) by myself. The problem is that the resulting jar file does not includes libjni*.so files. The official release of javacv has three jar: javacv.jar javacpp.jar javacv-linux开发者_运维技巧-x86.jar (this is where the libjni*.so is located)

I use ant to build the project, and it produces javacv.jar and javacpp.jar, the javacv-linux-x86.rar however, is missing. When I look at 'build/classes/com/googlecode/javacv/cpp/linux-x86', the libjni*.so are there. Does anyone know how to fix it?