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diff --git a/gccmakedep.man b/gccmakedep.man
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+.TH gccmakedep 1 __vendorversion__
+.SH NAME
+gccmakedep \- create dependencies in makefiles using 'gcc -M'
+.SH SYNOPSIS
+.B gccmakedep
+[
+.BI \-s separator
+] [
+.BI \-f makefile
+] [
+.BI \-a
+] [
+\-\^\-
+.I options
+\-\^\-
+]
+.I sourcefile
+\&.\|.\|.
+.SH DESCRIPTION
+The
+.B gccmakedep
+program calls 'gcc -M' to output
+.I makefile
+rules describing the dependencies of each
+.IR sourcefile ,
+so that
+.BR make (1)
+knows which object files must be recompiled when a dependency has changed.
+.PP
+By default,
+.B gccmakedep
+places its output in the file named
+.I makefile
+if it exists, otherwise
+.I Makefile.
+An alternate makefile may be specified with the
+.B \-f
+option.
+It first searches the makefile for a line beginning with
+.sp
+\&    # DO NOT DELETE
+.sp
+or one provided with the
+.B \-s
+option, as a delimiter for the dependency output.
+If it finds it, it will delete everything following this up to the end of
+the makefile and put the output after this line.
+If it doesn't find it, the program will append the string to the makefile
+and place the output after that.
+.SH EXAMPLE
+Normally,
+.B gccmakedep
+will be used in a makefile target so that typing 'make depend' will bring
+the dependencies up to date for the makefile.
+For example,
+.nf
+    SRCS\0=\0file1.c\0file2.c\0.\|.\|.
+    CFLAGS\0=\0\-O\0\-DHACK\0\-I\^.\^.\^/foobar\0\-xyz
+    depend:
+            gccmakedep\0\-\^\-\0$(CFLAGS)\0\-\^\-\0$(SRCS)
+.fi
+.SH OPTIONS
+The program will ignore any option that it does not understand, so you may
+use the same arguments that you would for
+.BR gcc (1),
+including
+.B \-D
+and
+.B \-U
+options to define and undefine symbols and
+.B \-I
+to set the include path.
+.TP
+.B \-a
+Append the dependencies to the file instead of replacing existing
+dependencies.
+.TP
+.BI \-f makefile
+Filename.
+This allows you to specify an alternate makefile in which
+.B gccmakedep
+can place its output.
+Specifying \(lq\-\(rq as the file name (that is,
+.BR \-f\- )
+sends the output to standard output instead of modifying an existing file.
+.TP
+.BI \-s string
+Starting string delimiter.
+This option permits you to specify a different string for
+.B gccmakedep
+to look for in the makefile.
+The default is \(lq# DO NOT DELETE\(rq.
+.TP
+.BI \-\^\- " options " \-\^\-
+If
+.B gccmakedep
+encounters a double hyphen (\-\^\-) in the argument list, then any
+unrecognized arguments following it will be silently ignored.
+A second double hyphen terminates this special treatment.
+In this way,
+.B gccmakedep
+can be made to safely ignore esoteric compiler arguments that might
+normally be found in a CFLAGS
+.B make
+macro (see the
+.B EXAMPLE
+section above).
+.BR \-D ,
+.BR \-I ,
+and
+.B \-U
+options appearing between the pair of double hyphens are still processed
+normally.
+.SH "SEE ALSO"
+.BR gcc (1),
+.BR make (1),
+.BR makedepend (1).
+.SH AUTHOR
+.B gccmakedep
+was written by the XFree86 Project based on code supplied by Hongjiu Lu.
+.PP
+Colin Watson wrote this manual page, originally for the Debian Project,
+based partly on the manual page for
+.BR makedepend (1).
diff --git a/gccmdep.cpp b/gccmdep.cpp
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+++ b/gccmdep.cpp
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+XCOMM!/bin/sh
+
+XCOMM
+XCOMM makedepend which uses 'gcc -M'
+XCOMM
+XCOMM $XFree86: xc/config/util/gccmdep.cpp,v 3.10 2002/11/25 14:04:48 eich Exp $
+XCOMM
+XCOMM Based on mdepend.cpp and code supplied by Hongjiu Lu <hjl@nynexst.com>
+XCOMM
+
+TMP=${TMPDIR-/tmp}/mdep$$
+CC=CCCMD
+RM=RMCMD
+LN=LNCMD
+MV=MVCMD
+
+XCOMM Security: if $tmp exists exit immediately
+rm -f ${TMP}
+if [ -e ${TMP} ] ; then
+    echo "$0: ${TMP} exists already, exit." 1>&2
+    exit 1;
+fi
+if [ -n "`type -p mktemp`" ] ; then
+    TMP="`mktemp ${TMP}.XXXXXX`" || exit 1
+fi
+
+trap "$RM ${TMP}*; exit 1" 1 2 15
+trap "$RM ${TMP}*; exit 0" 1 2 13
+
+files=
+makefile=
+endmarker=
+magic_string='# DO NOT DELETE'
+append=n
+args=
+
+while [ $# != 0 ]; do
+    if [ "$endmarker"x != x -a "$endmarker" = "$1" ]; then
+	endmarker=
+    else
+	case "$1" in
+	    -D*|-I*|-U*)
+		args="$args '$1'"
+		;;
+	    -g*|-O*)
+		;;
+	    *)
+		if [ "$endmarker"x = x ]; then
+		    case $1 in
+XCOMM ignore these flags
+			-w|-o|-cc)
+			    shift
+			    ;;
+			-v)
+			    ;;
+			-s)
+			    magic_string="$2"
+			    shift
+			    ;;
+			-f*)
+			    if [ "$1" = "-f-" ]; then
+				makefile="-"
+			    elif [ "$1" = "-f" ]; then
+				makefile="$2"
+				shift
+			    else
+				echo "$1" | sed 's/^\-f//' >${TMP}arg
+				makefile="`cat ${TMP}arg`"
+				rm -f ${TMP}arg
+			    fi
+			    ;;
+			--*)
+			    endmarker=`echo $1 | sed 's/^\-\-//'`
+			    if [ "$endmarker"x = x ]; then
+				endmarker="--"
+			    fi
+			    ;;
+			-a)
+			    append=y
+			    ;;
+			-*)
+			    echo "Unknown option '$1' ignored" 1>&2
+			    ;;
+			*)
+			    files="$files $1"
+			    ;;
+		    esac
+		fi
+		;;
+	esac
+    fi
+    shift
+done
+
+if [ x"$files" = x ]; then
+XCOMM Nothing to do
+    exit 0
+fi
+
+case "$makefile" in
+    '')
+	if [ -r makefile ]; then
+	    makefile=makefile
+	elif [ -r Makefile ]; then
+	    makefile=Makefile
+	else
+	    echo 'no makefile or Makefile found' 1>&2
+	    exit 1
+	fi
+	;;
+esac
+
+if [ X"$makefile" != X- ]; then
+    if [ x"$append" = xn ]; then
+        sed -e "/^$magic_string/,\$d" < $makefile > $TMP
+        echo "$magic_string" >> $TMP
+    else
+        cp $makefile $TMP
+    fi
+fi
+
+CMD="$CC -M $args $files"
+if [ X"$makefile" != X- ]; then
+    CMD="$CMD >> $TMP"
+fi
+eval $CMD
+if [ X"$makefile" != X- ]; then
+    $RM ${makefile}.bak
+    $MV $makefile ${makefile}.bak
+    $MV $TMP $makefile
+fi
+
+$RM ${TMP}*
+exit 0