Include <functinonal> for std::function

AMDmi3 · abau · commit e739ee577780 · 2016-03-12T11:12:47.000+01:00
diff --git a/lib/src/history.hpp b/lib/src/history.hpp
@@ -5,6 +5,7 @@
 #ifndef DILAY_HISTORY
 #define DILAY_HISTORY
 
+#include <functional>
 #include "configurable.hpp"
 #include "macro.hpp"
 
