jni in linux

[ceazer]

hi,

I have a c++ program with a class, and many functions.
it is basically a phone program.. it can make call, answer call, have conferences, it can transfer calls, it can hold calls etc.,
now i have written a java native method for a c++ function called start() which is in c++ code.
this function initializes the phone. once initialized, any activity can be made in that phone(like the functions mentioned above).

my questions are,

1. i have just written native method for only one function of the c++ in java.. it is throwing an error

Exception in thread "main" java.lang.UnsatisfiedLinkError: libsample: /usr/lib/gcj-4.1.1/libsample.so: undefined symbol: pjsua_create
at java.lang.Runtime._load(libgcj.so.7rh)
at java.lang.Runtime.loadLibrary(libgcj.so.7rh)
at java.lang.System.loadLibrary(libgcj.so.7rh)
at sample.<clinit>(sample.java:4)
at java.lang.Class.initializeClass(libgcj.so.7rh)

what does it mean.

i created a .so file using the g++ and my c++ program.
i moved that .so file to /usr/lib/gcj-4.1.1 for obvious reasons...
now why that error????

is the .so file not reading the header file???
if so how to link those two??
any help please...

[Rubberman]

This is because the .so you are linking the libsample.so which has a dependency on a symbol that is not found in that library. You need to determine which library that symbol is implemented in, and link that as well.

[ceazer]

how to link that... please help me.... i'm new to linux

[Rubberman]

I need the make file you used to create your C++ class library, and how you linked that into your Java application (Java source if possible). Don't know if we need your C++ headers or source as yet.