C++ stack unwinding

The following simple C++ program does not end up calling the destructor 
because the stack does not get unwound for the threads that aren't part 
of the thread from which SIGABRT is called (by the uncaught exception). 
  Is there a simple way to get stack unwinding to happen properly? 
Thanks in advance.

#include <exception>
#include <iostream>
#include <st.h>
using namespace std;

class cleanup {
   public:
     ~cleanup() { cout << "clean up" << endl; }
};

void *f(void *) {
   throw exception();
   return NULL;
}

int main() {
   cleanup c;
   st_init();
   st_thread_t t = st_thread_create(&f, (void*)"abc", 1, 0);
   st_thread_join(t, NULL);
   return 0;
}

-- 
Yang Zhang
http://www.mit.edu/~y_z/

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