From ea07b72c0e8930b4fb53914233df1583c5a6bb9c Mon Sep 17 00:00:00 2001
From: Razvan Becheriu <razvan@isc.org>
Date: Mon, 18 Nov 2019 12:16:20 +0200
Subject: [PATCH] [#891,!592] use c++11 syntax - compile without errors on
 clang and g++

---
 src/lib/util/multi_threading_mgr.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/lib/util/multi_threading_mgr.h b/src/lib/util/multi_threading_mgr.h
index d16ba3d699..1b2f768110 100644
--- a/src/lib/util/multi_threading_mgr.h
+++ b/src/lib/util/multi_threading_mgr.h
@@ -67,7 +67,7 @@ public:
     /// @param f the functor to call
     /// @result the result of the functor call
     template<typename Lockable, typename Callable>
-    static auto call(Lockable& lk, const Callable& f) {
+    static auto call(Lockable& lk, const Callable& f) -> decltype(f()) {
         if (MultiThreadingMgr::instance().getMode()) {
             std::lock_guard<Lockable> lock(lk);
             return f();