From 1f29d399f449af918189f0d8a0302a74286dc6b7 Mon Sep 17 00:00:00 2001
From: "Wladimir J. van der Laan" <laanwj@gmail.com>
Date: Sun, 15 Apr 2012 11:42:40 +0200
Subject: [PATCH] work around issue in boost::program_options that prevents
 from compiling in clang

---
 src/util.cpp | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/util.cpp b/src/util.cpp
index 911388b3..1eda59ba 100644
--- a/src/util.cpp
+++ b/src/util.cpp
@@ -6,6 +6,17 @@
 #include "headers.h"
 #include "strlcpy.h"
 #include <boost/algorithm/string/join.hpp>
+
+// Work around clang compilation problem in Boost 1.46:
+// /usr/include/boost/program_options/detail/config_file.hpp:163:17: error: call to function 'to_internal' that is neither visible in the template definition nor found by argument-dependent lookup
+// See also: http://stackoverflow.com/questions/10020179/compilation-fail-in-boost-librairies-program-options
+//           http://clang.debian.net/status.php?version=3.0&key=CANNOT_FIND_FUNCTION
+namespace boost {
+    namespace program_options {
+        std::string to_internal(const std::string&);
+    }
+}
+
 #include <boost/program_options/detail/config_file.hpp>
 #include <boost/program_options/parsers.hpp>
 #include <boost/filesystem.hpp>