Linking C++ with a D-library

[Milvakili]

Hi, I'm a new to D and I could not find any relevant answers in 
the forum.

I want to call functions from D-lib from c++ main.
dlibrary
import std.stdio;

extern (C++) void foo(int i, int j, int k) {
  writefln("i = %s", i);
  writefln("j = %s", j);
  writefln("k = %s", k);
}
void main(){}

######
c++ binary

#include <iostream>

void CXXmain();
void foo(int i, int j, int k);
using namespace std;

int main(){
  cout << "This is the main of C++\n";
  foo(1,3,4);
  return 0;
}

####
I can compile d with dmd and c++ with g++ then linked them with 
g++.  The problem is when I run the binary I got:

./runtest
This is the main of C++
Segmentation Fault

I could not figure out the problem.  And when I call the C++ 
functions from the main of D everything works.  So why have I 
segmentation when I call the main from C++.