#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <dlfcn.h>
#include <guestfs.h>

int
main ()
{
  void *dl = dlopen (NULL, RTLD_LAZY);
  if (!dl) {
    fprintf (stderr, "dlopen: %s\n", dlerror ());
    exit (1);
  }
  int has_dd = dlsym (dl, "guestfs_dd") != NULL;
  dlclose (dl);

  if (!has_dd)
    printf ("this libguestfs.so does NOT have guestfs_dd function\n");
  else {
    printf ("this libguestfs.so has guestfs_dd function\n");
    // Now it's safe to call guestfs_dd (g, "foo", "bar");
  }

  exit (0);
}