OMG.. I’m dying of swig for c++ and ruby interconnections….

[person.hpp]

#ifndef __PERSON
#define __PERSON

#include <iostream>
#include <string>

class Person
{
    std::string name_;
public:
    Person(const std::string& name): name_(name) { }
    std::string getName();
};

#endif

[person.cpp]

#include "person.hpp"

using namespace std;

string Person::getName()
{
    return name_;
}

[person.i]

%module RubyPerson

%{
#include "person.hpp"
%}

%include "std_string.i"
%include "person.hpp"

So far, so good. But…

$ swig -c++ -ruby person.i
$ g++ -fpic -c person.cpp person_wrap.cxx -I/usr/lib/ruby/1.8/i486-linux
$ g++ -shared person.o person_wrap.o -o rubyperson.so
$ irb
irb(main):001:0> require "rubyperson.so"
LoadError: ./rubyperson.so: undefined symbol: Init_rubyperson - ./rubyperson.so
        from ./rubyperson.so
        from (irb):1
        from :0
irb(main):002:0> aslfdjklq%j1$@$#1@%!FKLQR!!@#$%K;gjsdf