From 7bb7e830d6899214e9e896f920483ddb39c43f7b Mon Sep 17 00:00:00 2001
From: Paul Harris <paulharris@computer.org>
Date: Tue, 23 Nov 2010 19:44:51 +0800
Subject: [PATCH] From Ferdinand Mitterbauer: "Building a project using
 libkdtree++ using Intel C++ Compiler 11.1 (on Windows 7, 64bit) results in
 errors." Applied suggested fix.

---
 kdtree++/kdtree.hpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kdtree++/kdtree.hpp b/kdtree++/kdtree.hpp
index 53bbfe4..665ba21 100644
--- a/kdtree++/kdtree.hpp
+++ b/kdtree++/kdtree.hpp
@@ -67,6 +67,7 @@
 #  include <map>
 #endif
 #include <algorithm>
+#include <functional>
 
 #ifdef KDTREE_DEFINE_OSTREAM_OPERATORS
 #  include <ostream>