From: jim@...
Date: 2004-08-19T07:15:13+09:00
Subject: swig problem with init

I have an innocuous swig/ruby case that is causing me some grief.
The problem is probably obvious, but I'm not seeing the solution
right now.

I have a .i file that defines a module 

     cat itkdb.i
    /* itkdb.i */
    %module ITKDb

    %{
    %}

This generates a wrapper with the following lines of interest:

    #define SWIG_init    Init_ITKDb
    #define SWIG_name    "ITKDb"

    #ifdef __cplusplus
    extern "C"
    #endif
    SWIGEXPORT(void) Init_ITKDb(void) {
        int i;

        SWIG_InitRuntime();
        mITKDb = rb_define_module("ITKDb");

        for (i = 0; swig_types_initial[i]; i++) {
            swig_types[i] = SWIG_TypeRegister(swig_types_initial[i]);
            SWIG_define_class(swig_types[i]);
        }

    }

I compile this against a vendor supplied library and try to load the .so
file and get:

    ruby -r itkdb -e {}
    ./itkdb.so: /usr/lib/libruby.so.1.8: undefined symbol: Init_itkdb -
    ./itkdb.so (LoadError)

Can someone tell me what I'm doing wrong here?

-- 
Jim Freeze