From d18f49cbb37d1e4755e7ebfafe9bda949156355c Mon Sep 17 00:00:00 2001
From: Gael Guennebaud <g.gael@free.fr>
Date: Fri, 18 Jan 2019 11:12:42 +0100
Subject: Fix compilation of unit tests with gcc and c++17

---
 test/main.h | 1 +
 1 file changed, 1 insertion(+)

(limited to 'test/main.h')

diff --git a/test/main.h b/test/main.h
index 9c1465e9a..a8226ab19 100644
--- a/test/main.h
+++ b/test/main.h
@@ -17,6 +17,7 @@
 #include <sstream>
 #include <vector>
 #include <typeinfo>
+#include <functional>
 
 // The following includes of STL headers have to be done _before_ the
 // definition of macros min() and max().  The reason is that many STL
-- 
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