#include <dlfcn.h>

#include <stdio.h>

#include <stdlib.h>

extern int call_me (void);

int

call_me (void)

{

  int (*fp) (void);

  fp = dlsym (RTLD_DEFAULT, "foo");

  if (fp == NULL)

    {

      printf ("cannot get address of foo in global scope: %s\n", dlerror ());

      exit (1);

    }

  return fp () - 42;

}