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

int x[2] = {1, 2};
int y[2] = {3, 4};
int z[2];

int main() {
  void *handle;
  void (*add_vec)(int *, int *, int *, int);
  char *error;

  /* Dynamically load the shared library containing add_vec() */
  handle = dlopen("../static_library/libvec.so", RTLD_LAZY);
  if (!handle) {
    fprintf(stderr, "%s\n", dlerror());
    exit(1);
  }

  /* Get a pointer to the add_vec() function we just loaded */
  add_vec = dlsym(handle, "add_vec");
  if ((error = dlerror()) != NULL) {
    fprintf(stderr, "%s\n", error);
    exit(1);
  }

  /* Now we can call add_vec() just like any other function */
  add_vec(x, y, z, 2);
  printf("z = [%d %d]\n", z[0], z[1]);

  /* Unload the shared library */
  if ((dlclose(handle)) < 0) {
    fprintf(stderr, "%s\n", dlerror());
    exit(1);
  }

  return 0;
}