Found when applying relocs in .debug that reference removed functions.
	PR 17954
	* powerpc.cc (Global_symbol_visitor_opd::operator()): Set default
	visibility.
+2015-02-18  Alan Modra  <amodra@gmail.com>
+
+       PR 17954
+       * powerpc.cc (Global_symbol_visitor_opd::operator()): Set default
+       visibility.
+
 2015-02-17  Rafael Ávila de Espíndola <rafael.espindola@gmail.com>
 
        * gc.h (Garbage_collection::add_reference): Don't use find.
 
        && symobj->get_opd_discard(sym->value()))
       {
        sym->set_undefined();
+       sym->set_visibility(elfcpp::STV_DEFAULT);
        sym->set_is_defined_in_discarded_section();
        sym->set_symtab_index(-1U);
       }