From 81bc4c3cbb2bee418b91baf5a4f60695e1e67127 Mon Sep 17 00:00:00 2001
From: "lperron@google.com"
 <lperron@google.com@59fed7e4-672f-1a80-1451-5ac2ff6d83f1>
Date: Tue, 8 Jul 2014 16:57:20 +0000
Subject: [PATCH] fix

---
 src/glop/preprocessor.cc | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/glop/preprocessor.cc b/src/glop/preprocessor.cc
index 14a0460fa1..1ffacbf8bf 100644
--- a/src/glop/preprocessor.cc
+++ b/src/glop/preprocessor.cc
@@ -1,6 +1,8 @@
 
 #include "glop/preprocessor.h"
 
+#include <cmath>
+
 #include "base/stringprintf.h"
 #include "glop/lp_utils.h"
 #include "glop/matrix_utils.h"