1  #include <dlfcn.h>
       2  #include <stdio.h>
       3  #include <stdlib.h>
       4  
       5  extern int call_me (void);
       6  
       7  int
       8  call_me (void)
       9  {
      10    void *h;
      11    int (*fp) (void);
      12    int res;
      13  
      14    h = dlopen ("reldepmod1.so", RTLD_LAZY);
      15    if (h == NULL)
      16      {
      17        printf ("cannot open reldepmod1.so in %s: %s\n", __FILE__, dlerror ());
      18        exit (1);
      19      }
      20  
      21    fp = dlsym (h, "foo");
      22    if (fp == NULL)
      23      {
      24        printf ("cannot get address of foo in global scope: %s\n", dlerror ());
      25        exit (1);
      26      }
      27  
      28    res = fp () - 42;
      29  
      30    if (dlclose (h) != 0)
      31      {
      32        printf ("failure when closing h in %s: %s\n", __FILE__, dlerror ());
      33        exit (1);
      34      }
      35  
      36    return res;
      37  }