From c6997885739bc9c71e467199c0034b01d36d4b5f Mon Sep 17 00:00:00 2001
From: Thomas Sondergaard <thomas.sondergaard@karoshealth.com>
Date: Mon, 28 Nov 2016 12:06:34 +0100
Subject: Export fixed_address_empty_string

commit 98835fb8f8 broke use of protobuf as shared library on Windows. Example
error message:

  error LNK2001: unresolved external symbol "class google::protobuf::internal::ExplicitlyConstructed<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > > google::protobuf::internal::fixed_address_empty_string"
---
 src/google/protobuf/generated_message_util.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/google/protobuf/generated_message_util.h b/src/google/protobuf/generated_message_util.h
index 8dc64c49..28ed495c 100644
--- a/src/google/protobuf/generated_message_util.h
+++ b/src/google/protobuf/generated_message_util.h
@@ -111,7 +111,7 @@ class ExplicitlyConstructed {
 
 // Default empty string object. Don't use this directly. Instead, call
 // GetEmptyString() to get the reference.
-extern ExplicitlyConstructed< ::std::string> fixed_address_empty_string;
+LIBPROTOBUF_EXPORT extern ExplicitlyConstructed< ::std::string> fixed_address_empty_string;
 LIBPROTOBUF_EXPORT extern ProtobufOnceType empty_string_once_init_;
 LIBPROTOBUF_EXPORT void InitEmptyString();
 
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