#!/bin/sh -
#
# Copyright (c) 1991, 1993
#	The Regents of the University of California.  All rights reserved.
#
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# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
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#    may be used to endorse or promote products derived from this software
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# $FreeBSD: stable/11/usr.bin/mkdep/mkdep.sh 216370 2010-12-11 08:32:16Z joel $
#
#	@(#)mkdep.sh	8.1 (Berkeley) 6/6/93
#

setglobal PATH = '/bin:/usr/bin:/usr/ucb:/usr/old/bin'
export PATH

setglobal D = '.depend'			# default dependency file is .depend
setglobal append = '0'

while :
	{ match $1 {
		# -a appends to the depend file
		with -a
			setglobal append = '1'
			shift 

		# -f allows you to select a makefile name
		with -f
			setglobal D = $2
			shift; shift 

		# the -p flag produces "program: program.c" style dependencies
		# so .o's don't get produced
		with -p
			setglobal SED = ''s;\.o ; ;''
			shift 
		with *
			break 
	}
}

if test $Argc = 0  {
	echo 'usage: mkdep [-p] [-f depend_file] [cc_flags] file ...'
	exit 1
}

setglobal TMP = "/tmp/mkdep$Pid"

trap 'rm -f $TMP ; trap 2 ; kill -2 $$' 1 2 3 13 15

cc -M $ifsjoin(Argv) |
sed "
	s; \./; ;g
	/\.c:$/d
	$SED" |
awk '{
	if ($1 != prev) {
		if (rec != "")
			print rec;
		rec = $0;
		prev = $1;
	}
	else {
		if (length(rec $2) > 78) {
			print rec;
			rec = $0;
		}
		else
			rec = rec " " $2
	}
}
END {
	print rec
}' > $TMP

if test $Status != 0 {
	echo 'mkdep: compile failed.'
	rm -f $TMP
	exit 1
}

if test $append = 1 {
	cat $TMP >> $D
	rm -f $TMP
} else {
	mv $TMP $D
}
exit 0