From e00f67c6e04054bfcb860f31844a0007d5200d9c Mon Sep 17 00:00:00 2001
From: Jason Merrill <jason@redhat.com>
Date: Wed, 30 Jul 2014 17:29:25 -0400
Subject: [PATCH] re PR lto/53808 (Undefined symbol when building a library
 with lto)

	PR lto/53808
	PR c++/61659
	* pt.c (push_template_decl_real): Don't set DECL_COMDAT on friends.

From-SVN: r213311
---
 gcc/cp/ChangeLog                         |  6 ++++++
 gcc/cp/pt.c                              |  1 +
 gcc/testsuite/g++.dg/template/friend56.C | 13 +++++++++++++
 3 files changed, 20 insertions(+)
 create mode 100644 gcc/testsuite/g++.dg/template/friend56.C

diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index f01020776200..3d8584358447 100644
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -1,3 +1,9 @@
+2014-07-30  Jason Merrill  <jason@redhat.com>
+
+	PR lto/53808
+	PR c++/61659
+	* pt.c (push_template_decl_real): Don't set DECL_COMDAT on friends.
+
 2014-07-30  Paolo Carlini  <paolo.carlini@oracle.com>
 
 	PR c++/57397
diff --git a/gcc/cp/pt.c b/gcc/cp/pt.c
index 33a8bf47151b..baabcb1aa5b9 100644
--- a/gcc/cp/pt.c
+++ b/gcc/cp/pt.c
@@ -5021,6 +5021,7 @@ template arguments to %qD do not match original template %qD",
     }
 
   if (flag_implicit_templates
+      && !is_friend
       && VAR_OR_FUNCTION_DECL_P (decl))
     /* Set DECL_COMDAT on template instantiations; if we force
        them to be emitted by explicit instantiation or -frepo,
diff --git a/gcc/testsuite/g++.dg/template/friend56.C b/gcc/testsuite/g++.dg/template/friend56.C
new file mode 100644
index 000000000000..7dd5d486f864
--- /dev/null
+++ b/gcc/testsuite/g++.dg/template/friend56.C
@@ -0,0 +1,13 @@
+// Make sure we don't mistakenly mark f as DECL_COMDAT.
+// { dg-final { scan-assembler "_Z1fv" } }
+
+void f();
+
+template <class T> struct A
+{
+  friend void f();
+};
+
+A<int> a;
+
+void f() { }
-- 
2.47.2