d调用c++

//d.d
extern (C++) int foo(int i, int j, int k);

void main()
{
    foo(1, 2, 3);
}

//cpp.cpp
#include <iostream>

using namespace std;

int foo(int i, int j, int k)
{
    cout << "i = " << i << endl;
    cout << "j = " << j << endl;
    cout << "k = " << k << endl;
    return 7;
}

d:d.d cpp.obj
	dmd -m32mscoff $^ -of$@

cpp.obj:cpp.cpp
	clang++ -c $^ -o $@
	

cl文件好像不行,要用m32mscoff选项