[binutils] Bump binutils to 2.20.1

binutils/gold/symtab.cc

 // symtab.cc -- the gold symbol table
 
 // Copyright 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
 // Written by Ian Lance Taylor <iant@google.com>.
 
 // This file is part of gold.
 
 // This program is free software; you can redistribute it and/or modify
 // it under the terms of the GNU General Public License as published by
 // the Free Software Foundation; either version 3 of the License, or
@@ skipping 2224 matching lines @@
       else if (!sym->has_dynsym_index())
         {
           sym->set_dynsym_index(index);
           ++index;
           syms->push_back(sym);
           dynpool->add(sym->name(), false, NULL);
 
           // Record any version information.
           if (sym->version() != NULL)
             versions->record_version(this, dynpool, sym);
+
+          // If the symbol is defined in a dynamic object and is
+          // referenced in a regular object, then mark the dynamic
+          // object as needed.  This is used to implement --as-needed.
+          if (sym->is_from_dynobj() && sym->in_reg())
+            sym->object()->set_is_needed();
         }
     }
 
   // Finish up the versions.  In some cases this may add new dynamic
   // symbols.
   index = versions->finalize(this, index, syms);
 
   return index;
 }
 
@@ skipping 1023 matching lines @@
 
 #ifdef HAVE_TARGET_64_BIG
 template
 void
 Warnings::issue_warning<64, true>(const Symbol* sym,
                                   const Relocate_info<64, true>* relinfo,
                                   size_t relnum, off_t reloffset) const;
 #endif
 
 } // End namespace gold.