1 #!/bin/sh
2 #
3 # Copyright (c) 2014, 2015, 2016 Ingo Schwarze <schwarze@openbsd.org>
4 # Copyright (c) 2017, 2018 Kristaps Dzonsons <kristaps@bsd.lv>
5 # Copyright (c) 2022 Omar Polo <op@omarpolo.com>
6 #
7 # Permission to use, copy, modify, and distribute this software for any
8 # purpose with or without fee is hereby granted, provided that the above
9 # copyright notice and this permission notice appear in all copies.
10 #
11 # THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
12 # WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13 # MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14 # ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15 # WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16 # ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17 # OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 
19 set -e
20 
21 if command -v yacc 2>/dev/null >&2; then
22 	YACC=yacc
23 elif command -v bison 2>/dev/null >&2; then
24 	YACC=bison
25 else
26 	YACC=
27 fi
28 
29 while [ $# -gt 0 ]; do
30 	key="${1%%=*}"
31 	val="${1#*=}"
32 
33 	if [ "$1" = "$key" ]; then
34 		echo "$0: invalid key-value: $1" >&2
35 		exit 1
36 	fi
37 
38 	case "$key" in
39 	CC)
40 		CC="$val" ;;
41 	CFLAGS)
42 		CFLAGS="$val" ;;
43 	YACC)
44 		YACC="$val" ;;
45 	esac
46 
47 	shift
48 done
49 
50 if [ -z "$YACC" ]; then
51 	echo "fatal: can't find yacc or bison." >&2
52 	exit 1
53 fi
54 
55 [ -w config.log ] && mv config.log config.log.old
56 
57 exec 3> config.log
58 echo "config.log: writing..."
59 
60 CC="${CC:-cc}"
61 CFLAGS="${CFLAGS:--O2 -pipe} -I."
62 LIBS="${LIBS:-}"
63 LDFLAGS="${LDFLAGS:-}"
64 
65 COMPATS=
66 
67 HAVE_ERR=
68 HAVE_FREEZERO=
69 HAVE_GETEXECNAME=
70 HAVE_GETPROGNAME=
71 HAVE_PLEDGE=
72 HAVE_REALLOCARRAY=
73 HAVE_STRLCAT=
74 HAVE_STRLCPY=
75 HAVE_STRTONUM=
76 HAVE_SYS_QUEUE=
77 HAVE_VASPRINTF=
78 HAVE___PROGNAME=
79 
80 # singletest message var extra-cflags extra-libs
81 singletest() {
82 	cat >&3 <<EOF
83 ${1}: testing...
84 $CC ./../tests/${1}.c -Werror $3 -o test-$1 $LDFLAGS $4
85 EOF
86 	if $CC ./../tests/${1}.c -Werror $3 -o test-$1 $LDFLAGS $4 >&3 2>&3; then
87 		rm -f test-${1} test-${1}.d
88 
89 		if [ -n "$3" ]; then
90 			echo "${1}: $CC $3 succeeded" >&3
91 			echo "${1} ($3): yes"
92 		elif [ -n "${4}" ]; then
93 			echo "${1}: $CC $4 succeeded" >&3
94 			echo "${1} ($4): yes"
95 		else
96 			echo "${1}: $CC succeeded" >&3
97 			echo "${1}: yes"
98 		fi
99 		echo >&3
100 
101 		return 0
102 	fi
103 
104 	if [ -n "$3" ]; then
105 		echo "${1}: $CC $3 failed with $?" >&3
106 		echo "${1} ($3): no"
107 	elif [ -n "${4}" ]; then
108 		echo "${1}: $CC $4 failed with $?" >&3
109 		echo "${1} ($4): no"
110 	else
111 		echo "${1}: $CC failed with $?" >&3
112 		echo "${1}: no"
113 	fi
114 	echo >&3
115 
116 	return 1
117 }
118 
119 # runtest message var extra-cflags extra-libs pkgconfig-name
120 runtest() {
121 	if singletest "$1" "$2" "" ""; then
122 		eval HAVE_${2}=1
123 		return 0
124 	fi
125 
126 	if [ -n "$3" -o -n "$4" ]; then
127 		echo "retrying with ${3+$3 }$4" >&3
128 		if singletest "$1" "$2" "$3" "$4"; then
129 			if [ -n "$3" ]; then
130 				CFLAGS="$CFLAGS $3"
131 			fi
132 			if [ -n "${4}" ]; then
133 				LIBS="$LIBS $4"
134 			fi
135 			eval HAVE_${2}=1
136 			return 0
137 		fi
138 	fi
139 
140 	if [ -f ./../compat/${1}.c ]; then
141 		COMPATS="${1}.o $COMPATS"
142 	fi
143 
144 	eval HAVE_${2}=0
145 	return 1
146 }
147 
148 if runtest MMD _MMD -MMD >/dev/null; then
149 	echo "adding -MMD to CFLAGS" >&2
150 	echo "adding -MMD to CFLAGS" >&3
151 fi
152 
153 runtest err		ERR					|| true
154 runtest freezero	FREEZERO				|| true
155 runtest getexecname	GETEXECNAME				|| true
156 runtest getprogname	GETPROGNAME				|| true
157 runtest pledge		PLEDGE					|| true
158 runtest reallocarray	REALLOCARRAY -D_OPENBSD_SOURCE		|| true
159 runtest strlcat		STRLCAT					|| true
160 runtest strlcpy		STRLCPY					|| true
161 runtest strtonum	STRTONUM				|| true
162 runtest sys_queue	SYS_QUEUE				|| true
163 runtest vasprintf	VASPRINTF -D_GNU_SOURCE			|| true
164 runtest __progname	__PROGNAME				|| true
165 
166 if [ "${HAVE_SYS_QUEUE}" -eq 0 ]; then
167 	CFLAGS="-I ./../compat/sys ${CFLAGS}"
168 fi
169 
170 if [ -n "${COMPATS}" ]; then
171 	CFLAGS="-I ./../compat/ ${CFLAGS}"
172 fi
173 
174 exec > config.h
175 echo "config.h: writing..." >&2
176 
177 cat <<EOF
178 #ifndef CONFIG_H
179 #define CONFIG_H
180 
181 #ifdef __cplusplus
182 # error "Do not use C++: this is a C application."
183 #endif
184 
185 #define HAVE_ERR		${HAVE_ERR}
186 #define HAVE_FREEZERO		${HAVE_FREEZERO}
187 #define HAVE_GETEXECNAME	${HAVE_GETEXECNAME}
188 #define HAVE_GETPROGNAME	${HAVE_GETPROGNAME}
189 #define HAVE_PLEDGE		${HAVE_PLEDGE}
190 #define HAVE_REALLOCARRAY	${HAVE_REALLOCARRAY}
191 #define HAVE_STRLCAT		${HAVE_STRLCAT}
192 #define HAVE_STRLCPY		${HAVE_STRLCPY}
193 #define HAVE_STRTONUM		${HAVE_STRTONUM}
194 #define HAVE_SYS_QUEUE		${HAVE_SYS_QUEUE}
195 #define HAVE_VASPRINTF		${HAVE_VASPRINTF}
196 #define HAVE___PROGNAME		${HAVE___PROGNAME}
197 
198 #endif
199 EOF
200 
201 exec > config.mk
202 echo "config.mk: writing..." >&2
203 
204 cat <<EOF
205 CC =		${CC}
206 CFLAGS =	${CFLAGS}
207 LIBS =		${LIBS}
208 LDFLAGS =	${LDFLAGS}
209 YACC =		${YACC}
210 
211 COBJS =	${COMPATS}
212 
213 INSTALL=	install
214 INSTALL_PROGRAM=\${INSTALL} -m 0555
215 INSTALL_LIB=	\${INSTALL} -m 0444
216 INSTALL_MAN=	\${INSTALL} -m 0444
217 INSTALL_DATA=	\${INSTALL} -m 0444
218 
219 EOF
220 
221 for c in ${COMPATS}; do
222 	src="../compat/${c%.o}.c"
223 	cat <<EOF
224 $c: $src
225 	\${CC} \${CFLAGS} -c $src -o \$@
226 EOF
227 done
228 
229 echo "done!" >&2
230 echo >&2