linking to jni code

Hi,

I am using the below command to compile a java program making calls to
native functions implemented using JNI.

gcj --main=MyApp -fjni MyApp.class MyApp.o -o MyApp

Here MyApp.class is the class file generated from MyApp.java
MyApp.o is the object file generated from MyApp.c implementing the JNI
calls  InitBase and PrintString.

The command generated the executable but when executing it gives the
following error.

Exception in thread "main" java.lang.UnsatisfiedLinkError: InitBase
   at EpgApp.InitBase(MyApp)
   at EpgApp.main(MyApp)

Looks like the MyApp.o file does not get linked into the application.
Is there a way to get it linked into the Application statically?