From 7f3dee0e1cd3024cef687846f55b5981dccce926 Mon Sep 17 00:00:00 2001
From: Jason Merrill <jason@redhat.com>
Date: Tue, 14 Feb 2012 20:56:56 -0500
Subject: [PATCH] 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                    | 5 +++++
 gcc/cp/parser.c                     | 3 +++
 gcc/testsuite/ChangeLog             | 4 ++++
 gcc/testsuite/g++.dg/ext/attrib43.C | 5 +++++
 4 files changed, 17 insertions(+)
 create mode 100644 gcc/testsuite/g++.dg/ext/attrib43.C

diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index f7cafec320e..864b6d34506 100644
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -1,3 +1,8 @@
+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
diff --git a/gcc/cp/parser.c b/gcc/cp/parser.c
index 491f48e0fcc..3e2be97f9c9 100644
--- a/gcc/cp/parser.c
+++ b/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 ();
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 1a583e5ed2f..a7963aab233 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,7 @@
+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
diff --git a/gcc/testsuite/g++.dg/ext/attrib43.C b/gcc/testsuite/g++.dg/ext/attrib43.C
new file mode 100644
index 00000000000..fe9f0727cf6
--- /dev/null
+++ b/gcc/testsuite/g++.dg/ext/attrib43.C
@@ -0,0 +1,5 @@
+template <class T> struct A { };
+
+template
+__attribute__ ((packed))
+struct A<int>;			// { dg-warning "attributes ignored" }