--- /dev/null
+// This file was automatically generated on Fri Aug 23 11:11:12 2019
+// by libs/config/tools/generate.cpp
+// Copyright John Maddock 2002-4.
+// Use, modification and distribution are subject to the
+// Boost Software License, Version 1.0. (See accompanying file
+// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+// See http://www.boost.org/libs/config for the most recent version.//
+// Revision $Id$
+//
+
+#ifdef __has_include
+#if __has_include(<version>)
+#include <version>
+#endif
+#endif
+
+#include <functional>
+
+#ifndef __cpp_lib_invoke
+#error "Macro << __cpp_lib_invoke is not set"
+#endif
+
+#if __cpp_lib_invoke < 201411
+#error "Macro __cpp_lib_invoke had too low a value"
+#endif
+
+int main( int, char *[] )
+{
+ return 0;
+}
+