From a83ac8663fb8042a881bc60b12a8bd3a0c03a3ff Mon Sep 17 00:00:00 2001
From: michaelpengcn <michaelpengcn@gmail.com>
Date: Sat, 28 Jan 2017 08:40:53 +0800
Subject: [PATCH] fix compile error on centos in metadata.h for constructors.
 (#2599)

---
 src/google/protobuf/metadata.h | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/google/protobuf/metadata.h b/src/google/protobuf/metadata.h
index f9257534eec..dca1fa453b6 100644
--- a/src/google/protobuf/metadata.h
+++ b/src/google/protobuf/metadata.h
@@ -172,7 +172,8 @@ class InternalMetadataWithArena
  public:
   InternalMetadataWithArena() {}
   explicit InternalMetadataWithArena(Arena* arena)
-      : InternalMetadataWithArenaBase(arena) {}
+      : InternalMetadataWithArenaBase<UnknownFieldSet,
+                                           InternalMetadataWithArena>(arena) {}
 
   void DoSwap(UnknownFieldSet* other) {
     mutable_unknown_fields()->Swap(other);
@@ -201,7 +202,8 @@ class InternalMetadataWithArenaLite
   InternalMetadataWithArenaLite() {}
 
   explicit InternalMetadataWithArenaLite(Arena* arena)
-      : InternalMetadataWithArenaBase(arena) {}
+      : InternalMetadataWithArenaBase<string,
+                                           InternalMetadataWithArenaLite>(arena) {}
 
   void DoSwap(string* other) {
     mutable_unknown_fields()->swap(*other);