Interface gcj-compiled library with Java programs in a runtime (other than gij)?

Hi,

I am wondering if we can use methods from a gcj-compiled library in 
uncompiled Java program(bytecode) executed on a VM.

According to gcj FAQ 1.7, there is no problem to do this with 'gij' 
interpreter/runtime. You can compile some Java code into library (native 
code), and run bytecode with 'gij' to invoke library methods. But this 
seems only capable for 'gij', and other runtimes like HotSpot cannot 
load and link the library properly.

I want to know if there is a general solution to allow you interface 
uncompiled Java program with gcj-compiled library. Any information or 
reference about this will be appreciated.

Many Thanks,
Yi