Mark __dso_handle hidden if assembler supports it.

2011-06-15  H.J. Lu  <hongjiu.lu@intel.com>

	PR c++/49412
	* decl.c (get_dso_handle_node): Mark __dso_handle hidden if
	assembler supports hidden visibility.

From-SVN: r175080

gcc/cp/ChangeLog

+2011-06-15  H.J. Lu  <hongjiu.lu@intel.com>
+
+	PR c++/49412
+	* decl.c (get_dso_handle_node): Mark __dso_handle hidden if
+	assembler supports hidden visibility.
+
 2011-06-14  Jason Merrill  <jason@redhat.com>
 
 	PR c++/49107

gcc/cp/decl.c

@@ -6435,6 +6435,11 @@ get_dso_handle_node (void)
   dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
 					ptr_type_node);
 
+#ifdef HAVE_GAS_HIDDEN
+  DECL_VISIBILITY (dso_handle_node) = VISIBILITY_HIDDEN;
+  DECL_VISIBILITY_SPECIFIED (dso_handle_node) = 1;
+#endif
+
   return dso_handle_node;
 }