From 8f0db5664a193a11e1141f003edbff48c29274ca Mon Sep 17 00:00:00 2001
From: Jason Merrill <jason@redhat.com>
Date: Wed, 21 Dec 2016 13:28:54 -0500
Subject: [PATCH] PR c++/78749 - friend in anonymous namespace

	* decl.c (wrapup_globals_for_namespace): Don't complain about friend
	pseudo-template instantiations.

From-SVN: r243862
---
 gcc/cp/ChangeLog                              |  6 ++++++
 gcc/cp/decl.c                                 |  1 +
 gcc/testsuite/g++.dg/warn/Wunused-function3.C | 11 +++++++++++
 3 files changed, 18 insertions(+)
 create mode 100644 gcc/testsuite/g++.dg/warn/Wunused-function3.C

diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index 757bcef99d5..c4c51719374 100644
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -1,3 +1,9 @@
+2016-12-21  Jason Merrill  <jason@redhat.com>
+
+	PR c++/78749 - friend in anonymous namespace
+	* decl.c (wrapup_globals_for_namespace): Don't complain about friend
+	pseudo-template instantiations.
+
 2016-12-16  Richard Biener  <rguenther@suse.de>
 
 	PR c++/71694
diff --git a/gcc/cp/decl.c b/gcc/cp/decl.c
index e83b542d424..295416051b7 100644
--- a/gcc/cp/decl.c
+++ b/gcc/cp/decl.c
@@ -926,6 +926,7 @@ wrapup_globals_for_namespace (tree name_space, void* data ATTRIBUTE_UNUSED)
 	    && DECL_EXTERNAL (decl)
 	    && !TREE_PUBLIC (decl)
 	    && !DECL_ARTIFICIAL (decl)
+	    && !DECL_FRIEND_PSEUDO_TEMPLATE_INSTANTIATION (decl)
 	    && !TREE_NO_WARNING (decl))
 	  {
 	    warning_at (DECL_SOURCE_LOCATION (decl),
diff --git a/gcc/testsuite/g++.dg/warn/Wunused-function3.C b/gcc/testsuite/g++.dg/warn/Wunused-function3.C
new file mode 100644
index 00000000000..94c9025a43e
--- /dev/null
+++ b/gcc/testsuite/g++.dg/warn/Wunused-function3.C
@@ -0,0 +1,11 @@
+// { dg-options -Wunused-function }
+
+namespace
+{
+  template <class T> struct A
+  {
+    friend void f(A) { }
+  };
+
+  A<int> a;
+}
-- 
2.30.2