From 2bb50371ca182ca1a25dea560e1fe0066b3e0697 Mon Sep 17 00:00:00 2001
From: Matt Amos <zerebubuth@gmail.com>
Date: Mon, 18 May 2015 22:34:34 +0100
Subject: [PATCH] Need optional I/O header on clang++, apparently.

---
 test/standalone/csv_test.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/test/standalone/csv_test.cpp b/test/standalone/csv_test.cpp
index d078ae83b..86b94e247 100644
--- a/test/standalone/csv_test.cpp
+++ b/test/standalone/csv_test.cpp
@@ -14,6 +14,7 @@
 #include <boost/filesystem.hpp>
 #include <boost/range/iterator_range_core.hpp>
 #include <boost/format.hpp>
+#include <boost/optional/optional_io.hpp>
 
 #include <iostream>