lt_dlforeach replacement?

I'm trying to revive a project that used lt_dlforeach, which is now
deprecated.
What function should I use to replace it? The same question was asked
before, about the same code, but it was not answered.

This is the code I need to fix:
  lookup_data data;
  data.symname = symname;
  data.result = NULL;
  lt_dlforeach (find_symbol, (lt_ptr) &data);
  return data.result;