xref: /netbsd/tools/host-mkdep/host-mkdep.in (revision 6c206598) 
1#!@BSHELL@ -
2#
3#	$NetBSD: host-mkdep.in,v 1.33 2023/07/10 08:55:44 rin Exp $
4#
5# Copyright (c) 1991, 1993
6#	The Regents of the University of California.  All rights reserved.
7#
8# Redistribution and use in source and binary forms, with or without
9# modification, are permitted provided that the following conditions
10# are met:
11# 1. Redistributions of source code must retain the above copyright
12#    notice, this list of conditions and the following disclaimer.
13# 2. Redistributions in binary form must reproduce the above copyright
14#    notice, this list of conditions and the following disclaimer in the
15#    documentation and/or other materials provided with the distribution.
16# 3. All advertising materials mentioning features or use of this software
17#    must display the following acknowledgement:
18#	This product includes software developed by the University of
19#	California, Berkeley and its contributors.
20# 4. Neither the name of the University nor the names of its contributors
21#    may be used to endorse or promote products derived from this software
22#    without specific prior written permission.
23#
24# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27# ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34# SUCH DAMAGE.
35#
36#	@(#)mkdep.old.compiler	8.1 (Berkeley) 6/6/93
37#
38
39APPEND=false
40MERGE=false
41OPTIONAL=false
42AWK_OPTIONAL=
43QUIET=false
44CPPFLAGS=
45NEWEXT=.o
46PREFIX=
47OUTFILE=.depend
48SRCS=
49
50usage()
51{
52	echo "Usage: $0 [-adopq] [-s .suffixes] [-f .depend] -- [flags] file ..." >&2
53	exit 1
54}
55
56set_objlist()
57{
58	if [ -n "$NEWEXT" ]; then
59		oifs="$IFS"
60		IFS=" ,"
61		set -- $NEWEXT
62		IFS="$oifs"
63		objlist=
64		for suf in "$@"; do
65			objlist="$objlist${objlist:+ }$PREFIX$file$suf"
66		done
67	else
68		objlist="$PREFIX$file"
69	fi
70}
71
72# A getopt compatible command line parser in shell comands.
73# (don't trust the shell builtin getopts to be in a known state on error)
74while [ $# -gt 0 ]; do
75	option="${1#-}"
76	[ "$option" = "$1" -o -z "$option" ] && break
77	while
78		optarg="${option#?}"
79		option="${option%$optarg}"
80
81		case "-$option" in
82		-a)	APPEND=true;;
83		-d)	MERGE=true;;
84		-o)	OPTIONAL=true; AWK_OPTIONAL='print ".OPTIONAL:" $0';;
85		-p)	NEWEXT=;;
86		-q)	QUIET=true;;
87		-[iv])	;;
88
89		-[fPs])	# Options with arguments
90			[ -z "$optarg" ] && {
91				[ $# = 1 ] && usage
92				shift
93				optarg="$1"
94			}
95			case "-$option" in
96			-f)	OUTFILE="$optarg";;
97			-P)	PREFIX="$optarg";;
98			-s)	NEWEXT="$optarg";;
99			esac
100			optarg=
101			;;
102
103		--)	[ -z "$optarg" ] && shift
104			break 2
105			;;
106
107		*)	$MERGE && usage
108			break 2;
109			;;
110		esac
111		[ -n "$optarg" ]
112	do
113		option="$optarg"
114	done
115	shift
116done
117
118[ $# = 0 ] && usage
119
120if $MERGE; then
121	SRCS="$*"
122else
123	#
124	# Process argument list.
125	# This is tricky, because arguments may contain spaces and other
126	# escapes characters.  The argument list is used like a tail queue.
127	# $cppargs has one x for each unprocessed argument, so when an
128	# argument is processed, it is shifted and the corresponding number
129	# of x's is removed.  The advantage to counting is that suffix removal
130	# works without fork.
131	#
132	cppargs=
133	for arg; do
134		cppargs="x$cppargs"
135	done
136	while [ -n "$cppargs" ]; do
137		case "$1" in
138		-L)			# takes an arg, but ignored
139				shift 2
140				cppargs=${cppargs%xx}
141				;;
142
143		-c|-[lLMOW]*)		# takes no extra args
144				shift
145				cppargs=${cppargs%x}
146				;;
147
148		-[IDU]*)
149				set -- "$@" "$1"
150				shift
151				cppargs=${cppargs%x}
152				;;
153
154		-[IDU]|-include|-iquote|-isystem|-isysroot)
155				set -- "$@" "$1" "$2"
156				shift 2
157				cppargs=${cppargs%xx}
158				;;
159
160		-isystem-cxx|-cxx-isystem)
161				set -- "$@" "-isystem" "$2"
162				shift 2
163				cppargs=${cppargs%xx}
164				;;
165		-std=*)
166				set -- "$@" "$1"
167				shift
168				cppargs=${cppargs%x}
169				;;
170
171		-no-cpp-precomp)	# This is a Darwin-specific option.
172				set -- "$@" "$1"
173				shift
174				cppargs=${cppargs%x}
175				;;
176
177		-nostdinc*)	# This is a gcc/g++ ism; ignore if not gcc/g++
178				case "@CFLAGS@" in
179				*-O2*)	# Autoconf puts -O2 when gcc only
180					set -- "$@" "$1"
181					;;
182				esac
183				shift
184				cppargs=${cppargs%x}
185				;;
186		--sysroot*)
187				shift
188				;;
189		-[iv])
190				shift
191				;;
192		-*)
193				echo "$0: Unknown option: $1" 1>&2 # all other -options
194				exit 1
195				;;
196
197		*)
198				SRCS="$SRCS $1"	# source file
199				shift
200				cppargs=${cppargs%x}
201				;;
202		esac
203	done
204fi
205
206[ -z "$SRCS" ] && usage
207
208TMP=/tmp/mkdep$$
209rm -f $TMP
210
211trap 'rm -f $TMP; exit 1' 1 2 3 13 15
212
213if $MERGE; then
214	for f in $SRCS; do
215		if [ ! -f "$f" ]; then
216			if ! $QUIET; then echo "$0: Ignoring $f" >&2; fi
217			continue
218		fi
219		while IFS=':'; read target dependents; do
220			IFS=
221			t1="${target#* }"
222			file="${target%.o}"
223			if [ "$t1" = "$target" -a "$file" != "$target" ]; then
224				set_objlist $file
225				target="$objlist"
226			fi
227			echo "$target:$dependents"
228			if "$OPTIONAL"; then
229				echo ".OPTIONAL:$dependents"
230			fi
231		done <$f
232	done >$TMP
233else
234	for f in $SRCS; do
235		file=${f##*/}
236		file=${file%.*}
237		set_objlist $file
238
239		( (@CPP@ "$@" $f; echo $? >&3) | @AWK@ '
240			/^#/ {
241				# Be as tolerant as possible.
242				sub(/^#(line)? [ 0-9]*"?/, "")
243				sub(/^#(pragma).*/, "")
244				sub(/^<.*/, "")
245				sub(/".*$/, "")
246				sub(/^\.\//, "")
247				sub(/ [ 0-9]*$/, "")
248
249				if ($0 in seenfiles) next
250				if ($0 ~ /y.tab.c/) next
251
252				seenfiles[$0] = 1
253				print "'"$objlist"'" ": " $0
254				'"$AWK_OPTIONAL"'
255			}
256		' >> $TMP) 3>&1 | (read a; exit $a)
257	done
258fi
259
260if $APPEND; then
261	cat $TMP >> $OUTFILE
262else
263	cat $TMP > $OUTFILE
264fi
265
266rm -f $TMP
267exit 0
268