cid.scm is picked from the sources of bigloo.
Here is the copyright of bigloo :
#*---------------------------------------------------------------------*/
#*    Copyright (c) 1994 by Manuel Serrano. All rights reserved.       */
#*                                                                     */
#*                                     ,--^,                           */
#*                               _ ___/ /|/                            */
#*                           ,;'( )__, ) '                             */
#*                          ;;  //   L__.                              */
#*                          '   \    /  '                              */
#*                               ^   ^                                 */
#*                                                                     */
#*                                                                     */
#*    This program is distributed in the hope that it will be useful.  */
#*    Use and copying of this software and preparation of derivative   */
#*    works based upon this software are permitted, so long as the     */
#*    following conditions are met:                                    */
#*           o credit to the authors is acknowledged following current */
#*             academic behaviour                                      */
#*           o no fees or compensation are charged for use, copies, or */
#*             access to this software                                 */
#*           o this copyright notice is included intact.               */
#*      This software is made available AS IS, and no warranty is made */
#*      about the software or its performance.                         */
#*                                                                     */
#*      Bug descriptions, use reports, comments or suggestions are     */
#*      welcome Send them to                                           */
#*        <Manuel.Serrano@inria.fr>                                    */
#*        Manuel Serrano                                               */
#*        INRIA -- Rocquencourt                                        */
#*        Domaine de Voluceau, BP 105                                  */
#*        78153 Le Chesnay Cedex                                       */
#*        France                                                       */
#*---------------------------------------------------------------------*/

The whole package is strongly based on bfd, the Binary File Description
Library from GNU (Copyright 1990, 1991, 1992, 1993, 1994, 1995 Free 
Software Foundation, Inc.), distributed under the term of GPL.

Some functions in dlink.c are directly copied from bfd.
