From 0e4974d62ecd488122ae99b0b2ed5afeb1d121eb Mon Sep 17 00:00:00 2001
From: Jonathan Wakely <jwakely@redhat.com>
Date: Tue, 20 Jan 2015 11:50:43 +0000
Subject: [PATCH] re PR libstdc++/64658 (std::atomic_init() undefined)

	PR libstdc++/64658
	* include/std/atomic (atomic_init): Define.
	* testsuite/29_atomics/atomic/64658.cc: New.

From-SVN: r219886
---
 libstdc++-v3/ChangeLog                        |  6 ++++
 libstdc++-v3/include/std/atomic               |  6 ++--
 .../testsuite/29_atomics/atomic/64658.cc      | 29 +++++++++++++++++++
 3 files changed, 39 insertions(+), 2 deletions(-)
 create mode 100644 libstdc++-v3/testsuite/29_atomics/atomic/64658.cc

diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index fee4452555f..92e51f04856 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,9 @@
+2015-01-20  Jonathan Wakely  <jwakely@redhat.com>
+
+	PR libstdc++/64658
+	* include/std/atomic (atomic_init): Define.
+	* testsuite/29_atomics/atomic/64658.cc: New.
+
 2015-01-19  Tim Shen  <timshen@google.com>
 
 	PR libstdc++/64649
diff --git a/libstdc++-v3/include/std/atomic b/libstdc++-v3/include/std/atomic
index 43cf4f339fd..1a17427e231 100644
--- a/libstdc++-v3/include/std/atomic
+++ b/libstdc++-v3/include/std/atomic
@@ -921,11 +921,13 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 
   template<typename _ITp>
     inline void
-    atomic_init(atomic<_ITp>* __a, _ITp __i) noexcept;
+    atomic_init(atomic<_ITp>* __a, _ITp __i) noexcept
+    { __a->store(__i, memory_order_relaxed); }
 
   template<typename _ITp>
     inline void
-    atomic_init(volatile atomic<_ITp>* __a, _ITp __i) noexcept;
+    atomic_init(volatile atomic<_ITp>* __a, _ITp __i) noexcept
+    { __a->store(__i, memory_order_relaxed); }
 
   template<typename _ITp>
     inline void
diff --git a/libstdc++-v3/testsuite/29_atomics/atomic/64658.cc b/libstdc++-v3/testsuite/29_atomics/atomic/64658.cc
new file mode 100644
index 00000000000..64739e0c1de
--- /dev/null
+++ b/libstdc++-v3/testsuite/29_atomics/atomic/64658.cc
@@ -0,0 +1,29 @@
+// Copyright (C) 2015 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library.  This library 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, or (at your option)
+// any later version.
+
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING3.  If not see
+// <http://www.gnu.org/licenses/>.
+
+// { dg-require-atomic-builtins "" }
+// { dg-options "-std=gnu++11" }
+// { dg-do link }
+
+#include <atomic>
+
+int
+main()
+{
+  std::atomic<int> i;
+  atomic_init(&i, 0);
+}
-- 
2.30.2