Hi,

With the following files:

test.hpp:

    template <class Derived>
    struct singleton {
        static void instance() { static Derived the_inst; }
        ~singleton() {}
    };

    struct test : singleton<test>
    {
    };

test1.cpp:

    #include "test.hpp"

    void test1()
    {
        test::instance();
    }

test2.cpp:

    #include "test.hpp"

    void test2()
    {
        test::instance();
    }

When I compile them with:

    dmc test1.cpp test2.cpp

I get this error:

 Error 1: Previous Definition Different : ?the_inst@?1??instance@?$singleton@Utest@@@@SAXXZ (void cdecl singleton<test >::?1??instance::the_inst(void ))

This seems to be something to do with singleton's destructor. If I remove it, the example works fine.

Daniel