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diff --git a/jam-files/engine/lists.h b/jam-files/engine/lists.h
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+/*
+ * Copyright 1993, 1995 Christopher Seiwald.
+ *
+ * This file is part of Jam - see jam.c for Copyright information.
+ */
+
+/*  This file is ALSO:
+ *  Copyright 2001-2004 David Abrahams.
+ *  Distributed under the Boost Software License, Version 1.0.
+ *  (See accompanying file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt)
+ */
+
+/*
+ * lists.h - the LIST structure and routines to manipulate them
+ *
+ * The whole of jam relies on lists of strings as a datatype.  This
+ * module, in conjunction with newstr.c, handles these relatively
+ * efficiently.
+ *
+ * Structures defined:
+ *
+ *  LIST - list of strings
+ *  LOL - list of LISTs
+ *
+ * External routines:
+ *
+ *  list_append() - append a list onto another one, returning total
+ *  list_new() - tack a string onto the end of a list of strings
+ *  list_copy() - copy a whole list of strings
+ *  list_sublist() - copy a subset of a list of strings
+ *  list_free() - free a list of strings
+ *  list_print() - print a list of strings to stdout
+ *  list_length() - return the number of items in the list
+ *
+ *  lol_init() - initialize a LOL (list of lists)
+ *  lol_add() - append a LIST onto an LOL
+ *  lol_free() - free the LOL and its LISTs
+ *  lol_get() - return one of the LISTs in the LOL
+ *  lol_print() - debug print LISTS separated by ":"
+ *
+ * 04/13/94 (seiwald) - added shorthand L0 for null list pointer
+ * 08/23/94 (seiwald) - new list_append()
+ */
+
+#ifndef LISTS_DWA20011022_H
+# define LISTS_DWA20011022_H
+
+#ifdef HAVE_PYTHON
+#include <Python.h>
+#endif
+
+/*
+ * LIST - list of strings
+ */
+
+typedef struct _list LIST;
+
+struct _list {
+    LIST    *next;
+    LIST    *tail;      /* only valid in head node */
+    char    *string;    /* private copy */
+};
+
+/*
+ * LOL - list of LISTs
+ */
+
+typedef struct _lol LOL;
+
+# define LOL_MAX 19
+
+struct _lol {
+    int count;
+    LIST    *list[ LOL_MAX ];
+};
+
+LIST *  list_append( LIST *l, LIST *nl );
+LIST *  list_copy( LIST *l, LIST  *nl );
+void    list_free( LIST *head );
+LIST *  list_new( LIST *head, char *string );
+void    list_print( LIST *l );
+int list_length( LIST *l );
+LIST *  list_sublist( LIST *l, int start, int count );
+LIST *  list_pop_front( LIST *l );
+LIST *  list_sort( LIST *l);
+LIST *  list_unique( LIST *sorted_list);
+int     list_in(LIST* l, char* value);
+
+# define list_next( l ) ((l)->next)
+
+# define L0 ((LIST *)0)
+
+void    lol_add( LOL *lol, LIST *l );
+void    lol_init( LOL *lol );
+void    lol_free( LOL *lol );
+LIST *  lol_get( LOL *lol, int i );
+void    lol_print( LOL *lol );
+void    lol_build( LOL* lol, char** elements );
+
+#ifdef HAVE_PYTHON
+
+PyObject *list_to_python(LIST *l);
+LIST *list_from_python(PyObject *l);
+
+#endif
+
+#endif
+