* options.h (class General_options): Add --[no-]gnu-unique options.

* symtab.cc (Symbol_table::sized_write_globals): Convert
	STB_GNU_UNIQUE to STB_GLOBAL if --no-gnu-unique.

gold/ChangeLog

@@ -1,3 +1,9 @@
+2011-10-31  Cary Coutant  <ccoutant@google.com>
+
+	* options.h (class General_options): Add --[no-]gnu-unique options.
+	* symtab.cc (Symbol_table::sized_write_globals): Convert
+	STB_GNU_UNIQUE to STB_GLOBAL if --no-gnu-unique.
+
 2011-10-31  Cary Coutant  <ccoutant@google.com>
 
 	PR gold/13359

gold/options.h

@@ -787,6 +787,10 @@ class General_options
   DEFINE_bool(g, options::EXACTLY_ONE_DASH, '\0', false,
 	      N_("Ignored"), NULL);
 
+  DEFINE_bool(gnu_unique, options::TWO_DASHES, '\0', true,
+	      N_("Enable STB_GNU_UNIQUE symbol binding (default)"),
+	      N_("Disable STB_GNU_UNIQUE symbol binding"));
+
   DEFINE_string(soname, options::ONE_DASH, 'h', NULL,
                 N_("Set shared library name"), N_("FILENAME"));
 

gold/symtab.cc

@@ -2814,6 +2814,12 @@ Symbol_table::sized_write_globals(const Stringpool* sympool,
       typename elfcpp::Elf_types<size>::Elf_Addr sym_value = sym->value();
       typename elfcpp::Elf_types<size>::Elf_Addr dynsym_value = sym_value;
       elfcpp::STB binding = sym->binding();
+
+      // If --no-gnu-unique is set, change STB_GNU_UNIQUE to STB_GLOBAL.
+      if (binding == elfcpp::STB_GNU_UNIQUE
+	  && !parameters->options().gnu_unique())
+	binding = elfcpp::STB_GLOBAL;
+
       switch (sym->source())
 	{
 	case Symbol::FROM_OBJECT: