diff --git a/unix/vncmkdepend/def.h b/unix/vncmkdepend/def.h
new file mode 100644
index 0000000..8fb4c23
--- /dev/null
+++ b/unix/vncmkdepend/def.h
@@ -0,0 +1,140 @@
+/* $XConsortium: def.h,v 1.25 94/04/17 20:10:33 gildea Exp $ */
+/*
+
+Copyright (c) 1993, 1994  X Consortium
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+Except as contained in this notice, the name of the X Consortium shall not be
+used in advertising or otherwise to promote the sale, use or other dealings
+in this Software without prior written authorization from the X Consortium.
+
+*/
+
+#include <stdio.h>
+#include <ctype.h>
+#ifndef X_NOT_POSIX
+#ifndef _POSIX_SOURCE
+#define _POSIX_SOURCE
+#endif
+#endif
+#include <sys/types.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+
+#define MAXDEFINES	512
+#define MAXFILES	512
+#define MAXDIRS		64
+#define SYMTABINC	10	/* must be > 1 for define() to work right */
+#define	TRUE		1
+#define	FALSE		0
+
+/* the following must match the directives table in main.c */
+#define	IF		0
+#define	IFDEF		1
+#define	IFNDEF		2
+#define	ELSE		3
+#define	ENDIF		4
+#define	DEFINE		5
+#define	UNDEF		6
+#define	INCLUDE		7
+#define	LINE		8
+#define	PRAGMA		9
+#define ERROR           10
+#define IDENT           11
+#define SCCS            12
+#define ELIF            13
+#define EJECT           14
+#define IFFALSE         15     /* pseudo value --- never matched */
+#define ELIFFALSE       16     /* pseudo value --- never matched */
+#define INCLUDEDOT      17     /* pseudo value --- never matched */
+#define IFGUESSFALSE    18     /* pseudo value --- never matched */
+#define ELIFGUESSFALSE  19     /* pseudo value --- never matched */
+
+#ifdef DEBUG
+extern int	_debugmask;
+/*
+ * debug levels are:
+ * 
+ *     0	show ifn*(def)*,endif
+ *     1	trace defined/!defined
+ *     2	show #include
+ *     3	show #include SYMBOL
+ *     4-6	unused
+ */
+#define debug(level,arg) { if (_debugmask & (1 << level)) warning arg; }
+#else
+#define	debug(level,arg) /**/
+#endif /* DEBUG */
+
+typedef	unsigned char boolean;
+
+struct symtab {
+	char	*s_name;
+	char	*s_value;
+};
+
+struct	inclist {
+	char		*i_incstring;	/* string from #include line */
+	char		*i_file;	/* path name of the include file */
+	struct inclist	**i_list;	/* list of files it itself includes */
+	int		i_listlen;	/* length of i_list */
+	struct symtab	*i_defs;	/* symbol table for this file */
+	int		i_ndefs;	/* current # defines */
+	int		i_deflen;	/* amount of space in table */
+	boolean		i_defchecked;	/* whether defines have been checked */
+	boolean		i_notified;	/* whether we have revealed includes */
+	boolean		i_marked;	/* whether it's in the makefile */
+	boolean		i_searched;	/* whether we have read this */
+	boolean         i_included_sym; /* whether #include SYMBOL was found */
+					/* Can't use i_list if TRUE */
+};
+
+struct filepointer {
+	char	*f_p;
+	char	*f_base;
+	char	*f_end;
+	long	f_len;
+	long	f_line;
+};
+
+#ifndef X_NOT_STDC_ENV
+#include <stdlib.h>
+#if defined(macII) && !defined(__STDC__)  /* stdlib.h fails to define these */
+char *malloc(), *realloc();
+#endif /* macII */
+#else
+char			*malloc();
+char			*realloc();
+#endif
+
+char			*copy();
+char			*base_name();
+char			*getline();
+struct symtab		*slookup();
+struct symtab		*isdefined();
+struct symtab		*fdefined();
+struct filepointer	*getfile();
+struct inclist		*newinclude();
+struct inclist		*inc_path();
+
+#if NeedVarargsPrototypes
+extern fatalerr(char *, ...);
+extern warning(char *, ...);
+extern warning1(char *, ...);
+#endif