parser.c (cp_parser_explicit_instantiation): Give a warning for ignored…

parser.c (cp_parser_explicit_instantiation): Give a warning for ignored attributes on explicit class instantiation.

	* parser.c (cp_parser_explicit_instantiation): Give a warning
	for ignored attributes on explicit class instantiation.

From-SVN: r184254

gcc/cp/ChangeLog

+2012-02-14  Jason Merrill  <jason@redhat.com>
+
+	* parser.c (cp_parser_explicit_instantiation): Give a warning
+	for ignored attributes on explicit class instantiation.
+
 2012-02-14  Jakub Jelinek  <jakub@redhat.com>
 
 	PR c++/52247

gcc/cp/parser.c

@@ -13122,6 +13122,9 @@ cp_parser_explicit_instantiation (cp_parser* parser)
       tree type;
 
       type = check_tag_decl (&decl_specifiers);
+      if (decl_specifiers.attributes)
+	warning (OPT_Wattributes,
+		 "attributes ignored on explicit type instantiation");
       /* Turn access control back on for names used during
 	 template instantiation.  */
       pop_deferring_access_checks ();

gcc/testsuite/ChangeLog

+2012-02-14  Jason Merrill  <jason@redhat.com>
+
+	* g++.dg/ext/attrib43.C: New.
+
 2012-02-14  Hans-Peter Nilsson  <hp@axis.com>
 
 	* lib/target-supports.exp (check_effective_target_fgnu_tm): New

gcc/testsuite/g++.dg/ext/attrib43.C

+template <class T> struct A { };
+
+template
+__attribute__ ((packed))
+struct A<int>;			// { dg-warning "attributes ignored" }