In common.h, define func_lib for function objects. In configure.ac, define HAVE_STD_FUNCTION and HAVE_BOOST_FUNCTION. Include function headers in ndnboost.
diff --git a/ndnboost/function/detail/gen_maybe_include.pl b/ndnboost/function/detail/gen_maybe_include.pl
new file mode 100644
index 0000000..ab4367d
--- /dev/null
+++ b/ndnboost/function/detail/gen_maybe_include.pl
@@ -0,0 +1,37 @@
+#!/usr/bin/perl -w
+#
+# Boost.Function library
+#
+# Copyright (C) 2001-2003 Douglas Gregor (gregod@cs.rpi.edu)
+#
+# Permission to copy, use, sell and distribute this software is granted
+# provided this copyright notice appears in all copies.
+# Permission to modify the code and to distribute modified code is granted
+# provided this copyright notice appears in all copies, and a notice
+# that the code was modified is included with the copyright notice.
+#
+# This software is provided "as is" without express or implied warranty,
+# and with no claim as to its suitability for any purpose.
+#
+# For more information, see http://www.boost.org
+use English;
+
+$max_args = $ARGV[0];
+
+open (OUT, ">maybe_include.hpp") or die("Cannot write to maybe_include.hpp");
+for($on_arg = 0; $on_arg <= $max_args; ++$on_arg) {
+ if ($on_arg == 0) {
+ print OUT "#if";
+ }
+ else {
+ print OUT "#elif";
+ }
+ print OUT " BOOST_FUNCTION_NUM_ARGS == $on_arg\n";
+ print OUT "# ifndef BOOST_FUNCTION_$on_arg\n";
+ print OUT "# define BOOST_FUNCTION_$on_arg\n";
+ print OUT "# include <ndnboost/function/function_template.hpp>\n";
+ print OUT "# endif\n";
+}
+print OUT "#else\n";
+print OUT "# error Cannot handle Boost.Function objects that accept more than $max_args arguments!\n";
+print OUT "#endif\n";