return 1;
  }
  signed char ret = fn();
  if (ret != want) {
    fprintf(stderr, "ERROR: %s=%d, want %d\n", fname, ret, want);
    return 1;
  }
  return 0;
}

int check_int32(void* handle, const char* fname, int32_t want) {
  int32_t (*fn)();
  fn = (int32_t (*)())dlsym(handle, fname);
  if (!fn) {
    fprintf(stderr, "ERROR: missing %s: %s\n", fname, dlerror());
    return 1;
  }