[PATCH] Handle undefined extern vars in output_in_order

[Alexander Monakov]

On Thu, 16 Jun 2016, Jan Hubicka wrote:
> I see, order is created at a time variable is added to symbol table (not at
> time when definition is given).  So we should have order everywhere.
> Patch is OK

Thanks!  If you don't mind a quick followup question: now that both
FOR_EACH_VARIABLE loops in two functions have the same structure, is
it alright to add a comment of the form

  /* There is a similar loop in output_in_order.  Please keep them in sync.  */

to symbol_table::output_variables, and vice versa?

Alexander