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diff --git a/ext/systemc/src/sysc/communication/sc_interface.h b/ext/systemc/src/sysc/communication/sc_interface.h
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+/*****************************************************************************
+
+  Licensed to Accellera Systems Initiative Inc. (Accellera) under one or
+  more contributor license agreements.  See the NOTICE file distributed
+  with this work for additional information regarding copyright ownership.
+  Accellera licenses this file to you under the Apache License, Version 2.0
+  (the "License"); you may not use this file except in compliance with the
+  License.  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+  implied.  See the License for the specific language governing
+  permissions and limitations under the License.
+
+ *****************************************************************************/
+
+/*****************************************************************************
+
+  sc_interface.h -- Abstract base class of all interface classes.
+
+  Original Author: Martin Janssen, Synopsys, Inc., 2001-05-21
+
+  CHANGE LOG IS AT THE END OF THE FILE
+ *****************************************************************************/
+
+#ifndef SC_INTERFACE_H
+#define SC_INTERFACE_H
+
+namespace sc_core {
+
+class sc_event;
+class sc_port_base;
+
+
+// ----------------------------------------------------------------------------
+//  CLASS : sc_interface
+//
+//  Abstract base class of all interface classes.
+//  BEWARE: Direct inheritance from this class must be done virtual.
+// ----------------------------------------------------------------------------
+
+class sc_interface
+{
+public:
+
+    // register a port with this interface (does nothing by default)
+    virtual void register_port( sc_port_base& port_,
+				const char*    if_typename_ );
+
+    // get the default event
+    virtual const sc_event& default_event() const;
+
+    // destructor (does nothing)
+    virtual ~sc_interface();
+
+protected:
+
+    // constructor (does nothing)
+    sc_interface();
+
+private:
+
+    // disabled
+    sc_interface( const sc_interface& );
+    sc_interface& operator = ( const sc_interface& );
+
+private:
+
+    static sc_event m_never_notified;
+
+#if defined(__SUNPRO_CC) && (__SUNPRO_CC == 0x520)
+    // Workaround for a bug in the Sun WorkShop 6 update 2 compiler.
+    // An empty virtual base class can cause the optimizer to
+    // generate wrong code.
+    char dummy;
+#endif
+};
+
+} // namespace sc_core
+
+//$Log: sc_interface.h,v $
+//Revision 1.3  2011/08/26 20:45:40  acg
+// Andy Goodrich: moved the modification log to the end of the file to
+// eliminate source line number skew when check-ins are done.
+//
+//Revision 1.2  2011/02/18 20:23:45  acg
+// Andy Goodrich: Copyright update.
+//
+//Revision 1.1.1.1  2006/12/15 20:20:04  acg
+//SystemC 2.3
+//
+//Revision 1.2  2006/01/03 23:18:26  acg
+//Changed copyright to include 2006.
+//
+//Revision 1.1.1.1  2005/12/19 23:16:43  acg
+//First check in of SystemC 2.1 into its own archive.
+//
+//Revision 1.7  2005/06/10 22:43:55  acg
+//Added CVS change log annotation.
+//
+
+#endif
+
+// Taf!