From: Simon Strandgaard <0bz63fz3m1qt3001@...>
Date: 2002-10-15T21:00:41+09:00
Subject: extensions in C++ (iostream)


Has anyone experience with or knows how to get iostream
working? 

I have searched, but not found any results. I would 
realy appreciate it.


Thanks in advance
Simon Strandgaard

here is my files
--------------------------------------------------------
# "test.rb"
require 'Test'
name = Test.getname
print "name=",name,"\n"
--------------------------------------------------------
// "test.cpp" 
#include "ruby.h"
#include <iostream>
//#include <stdio.h>

VALUE get_name(VALUE self) {
    char *name = "hello world";
    cout << "test" << endl;
    //printf("test\n");
    return rb_str_new2(name);
}

typedef VALUE (*HOOK)();
extern "C" void Init_Test() {
    VALUE test = rb_define_module("Test");
    rb_define_module_function(test, "getname", (HOOK)get_name, 0);
}
--------------------------------------------------------
# "extconf.rb"
require 'mkmf'
create_makefile("Test")
--------------------------------------------------------
ruby/ext> ls
extconf.rb   test.cpp   test.rb
ruby/ext> ruby extconf.rb 
creating Makefile
ruby/ext> make
c++ -fPIC -O -pipe  -fPIC -I. -I/usr/local/lib/ruby/1.6/i386-freebsd4 -I. -c -o test.o test.cpp
cc -shared -Wl,-soname,Test.so -L/usr/local/lib -o Test.so test.o -L. -lruby -lc 
ruby/ext> ruby test.rb
test.rb:1:in `require': ./Test.so: Undefined symbol "endl__FR7ostream" - ./Test.so (LoadError)
        from test.rb:1
ruby/ext>
--------------------------------------------------------

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