From 761677c3f844527aa67c75e718b05d13e7ff3386 Mon Sep 17 00:00:00 2001
From: Henning Baldersheim <balder@yahoo-inc.com>
Date: Mon, 24 Jul 2017 09:12:13 +0000
Subject: functional required explicit from gcc 7 and on.

---
 vespalib/src/vespa/vespalib/util/threadstackexecutorbase.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/vespalib/src/vespa/vespalib/util/threadstackexecutorbase.h b/vespalib/src/vespa/vespalib/util/threadstackexecutorbase.h
index 59f2891eae5..a91114b055e 100644
--- a/vespalib/src/vespa/vespalib/util/threadstackexecutorbase.h
+++ b/vespalib/src/vespa/vespalib/util/threadstackexecutorbase.h
@@ -10,6 +10,7 @@
 #include "runnable.h"
 #include <memory>
 #include <vector>
+#include <functional>
 #include <vespa/fastos/thread.h>
 
 namespace vespalib {
-- 
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