From 9e7e1ba009a58de5cc1f35fe41cda9e3c339b93a Mon Sep 17 00:00:00 2001
From: John Maddock <john@johnmaddock.co.uk>
Date: Sat, 15 Apr 2006 17:21:19 +0000
Subject: [PATCH] Fix for duplicate symbol errors when using VC7.1 without
 /Zc:wchar_t

[SVN r33706]
---
 src/usinstances.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/usinstances.cpp b/src/usinstances.cpp
index 3fe54a36..35400006 100644
--- a/src/usinstances.cpp
+++ b/src/usinstances.cpp
@@ -24,6 +24,11 @@
 #define BOOST_REGEX_US_INSTANTIATE
 
 #ifdef _DLL_CPPLIB
+//
+// This is a horrible workaround, without declaring these symbols extern we get
+// duplicate symbol errors when linking if the application is built without
+// /Zc:wchar_t
+//
 namespace std{
 template _CRTIMP2 bool __cdecl operator==(
    const basic_string<unsigned short, char_traits<unsigned short>, allocator<unsigned short> >&,
@@ -40,6 +45,7 @@ template _CRTIMP2 bool __cdecl operator<(
 template _CRTIMP2 bool __cdecl operator>(
    const basic_string<unsigned short, char_traits<unsigned short>, allocator<unsigned short> >&,
    const basic_string<unsigned short, char_traits<unsigned short>, allocator<unsigned short> >&);
+template<> _CRTIMP2 std::size_t __cdecl char_traits<unsigned short>::length(unsigned short const*);
 }
 #endif