Launching a new thread during static initialization

I have a DLL that needs to spawn a new thread when it is loaded. My current approach is something like this:

struct Dummy {Dummy() {} };
Dummy obj;

Dummy::Dummy()
{
     std::thread t([]() {std::cout<<"Helloworld\n"; });
     assert( t.joinable() );
     t.join();
}

Unfortunately, this code hangs forever at the t.join() line, and it does not print anything. The main application loads the dll with LoadLibrary.

I am using gcc 4.8 from Mingw.