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diff --git a/libs/ardour/ardour/control_protocol_search_path.h b/libs/ardour/ardour/control_protocol_search_path.h
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+/*
+ Copyright (C) 2007 Tim Mayberry
+
+ This program 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 2 of the License, or
+ (at your option) any later version.
+
+ This program 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 this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+#ifndef ARDOUR_CONTROL_PROTOCOL_SEARCH_PATH_INCLUDED
+#define ARDOUR_CONTROL_PROTOCOL_SEARCH_PATH_INCLUDED
+
+#include <pbd/search_path.h>
+
+namespace ARDOUR {
+
+ using PBD::SearchPath;
+
+ /**
+ * return a SearchPath containing directories in which to look for
+ * control surface plugins.
+ *
+ * If ARDOUR_SURFACES_PATH is defined then the SearchPath returned
+ * will contain only those directories specified in it, otherwise it will
+ * contain the user and system directories which may contain control
+ * surface plugins.
+ */
+ SearchPath control_protocol_search_path ();
+
+} // namespace ARDOUR
+
+#endif