Add wrapper header for (tr/)functional

src/libtomahawk/utils/Closure.h

@@ -23,14 +23,7 @@
 
 #include "config.h"
 #include "DllMacro.h"
-
-#if defined(_WEBSOCKETPP_CPP11_STL_) || defined(CXX_STD_FUNCTIONAL)
-#include <functional>
-using std::function;
-#else
-#include <tr1/functional>
-using std::tr1::function;
-#endif
+#include "utils/tr1-functional.h"
 
 #include <QMetaMethod>
 #include <QObject>

src/libtomahawk/utils/tr1-functional.h

@@ -0,0 +1,30 @@
+/* === This file is part of Tomahawk Player - <http://tomahawk-player.org> ===
+ *
+ *   Copyright 2014,      Uwe L. Korn  <uwelk@xhochy.com>
+ *
+ *   Tomahawk is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   Tomahawk is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with Tomahawk. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef TOMAHAWK_TR1_FUNCTIONAL
+#define TOMAHAWK_TR1_FUNCTIONAL
+
+#if defined(_WEBSOCKETPP_CPP11_STL_) || defined(CXX_STD_FUNCTIONAL)
+#include <functional>
+using std::function;
+#else
+#include <tr1/functional>
+using std::tr1::function;
+#endif
+
+#endif