#!/bin/sh -
#
# Copyright (c) 1991, 1993
#	The Regents of the University of California.  All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# 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.
# 4. Neither the name of the University nor the names of its contributors
#    may be used to endorse or promote products derived from this software
#    without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
#	@(#)mkdep.gcc.sh	8.1 (Berkeley) 6/6/93
# $FreeBSD: stable/11/usr.bin/mkdep/mkdep.gcc.sh 216370 2010-12-11 08:32:16Z joel $

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

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 pflag = 'p'
			shift 
		with *
			break 
	}
}

match $Argc { with 0 
	echo 'usage: mkdep [-ap] [-f file] [flags] file ...' > !2
	exit 1
}

setglobal TMP = "_mkdep$Pid"
trap 'rm -f $TMP ; trap 2 ; kill -2 $$' 1 2 3 13 15
trap 'rm -f $TMP' 0

# For C sources, mkdep must use exactly the same cpp and predefined flags
# as the compiler would.  This is easily arranged by letting the compiler
# pick the cpp.  mkdep must be told the cpp to use for exceptional cases.
setglobal CC = $(CC-"cc")
setglobal MKDEP_CPP = $(MKDEP_CPP-"${CC} -E")
setglobal MKDEP_CPP_OPTS = $(MKDEP_CPP_OPTS-"-M");

echo "# $ifsjoin(Argv)" > $TMP	# store arguments for debugging

if $MKDEP_CPP $MKDEP_CPP_OPTS @Argv >> $TMP { :
} else {
	echo 'mkdep: compile failed' > !2
	exit 1
}

match x$pflag {
	with x match $append { 
		with 0 sed -e 's; \./; ;g' < $TMP >  $D
		with * sed -e 's; \./; ;g' < $TMP >> $D
	   }
		
	with * match $append { 
		with 0 sed -e 's;\.o:;:;' -e 's; \./; ;g' < $TMP >  $D
		with * sed -e 's;\.o:;:;' -e 's; \./; ;g' < $TMP >> $D
	   }
	
}

exit $?