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_UNVEIL=
78 HAVE_VASPRINTF=
79 HAVE___PROGNAME=
80 
81 # singletest message var extra-cflags extra-libs
82 singletest() {
83 	cat >&3 <<EOF
84 ${1}: testing...
85 $CC ./../tests/${1}.c -Werror $3 -o test-$1 $LDFLAGS $4
86 EOF
87 	if $CC ./../tests/${1}.c -Werror $3 -o test-$1 $LDFLAGS $4 >&3 2>&3; then
88 		rm -f test-${1} test-${1}.d
89 
90 		if [ -n "$3" ]; then
91 			echo "${1}: $CC $3 succeeded" >&3
92 			echo "${1} ($3): yes"
93 		elif [ -n "${4}" ]; then
94 			echo "${1}: $CC $4 succeeded" >&3
95 			echo "${1} ($4): yes"
96 		else
97 			echo "${1}: $CC succeeded" >&3
98 			echo "${1}: yes"
99 		fi
100 		echo >&3
101 
102 		return 0
103 	fi
104 
105 	if [ -n "$3" ]; then
106 		echo "${1}: $CC $3 failed with $?" >&3
107 		echo "${1} ($3): no"
108 	elif [ -n "${4}" ]; then
109 		echo "${1}: $CC $4 failed with $?" >&3
110 		echo "${1} ($4): no"
111 	else
112 		echo "${1}: $CC failed with $?" >&3
113 		echo "${1}: no"
114 	fi
115 	echo >&3
116 
117 	return 1
118 }
119 
120 # runtest message var extra-cflags extra-libs pkgconfig-name
121 runtest() {
122 	if singletest "$1" "$2" "" ""; then
123 		eval HAVE_${2}=1
124 		return 0
125 	fi
126 
127 	if [ -n "$3" -o -n "$4" ]; then
128 		echo "retrying with ${3+$3 }$4" >&3
129 		if singletest "$1" "$2" "$3" "$4"; then
130 			if [ -n "$3" ]; then
131 				CFLAGS="$CFLAGS $3"
132 			fi
133 			if [ -n "${4}" ]; then
134 				LIBS="$LIBS $4"
135 			fi
136 			eval HAVE_${2}=1
137 			return 0
138 		fi
139 	fi
140 
141 	if [ -f ./../compat/${1}.c ]; then
142 		COMPATS="${1}.o $COMPATS"
143 	fi
144 
145 	eval HAVE_${2}=0
146 	return 1
147 }
148 
149 if runtest MMD _MMD -MMD >/dev/null; then
150 	echo "adding -MMD to CFLAGS" >&2
151 	echo "adding -MMD to CFLAGS" >&3
152 fi
153 
154 runtest err		ERR					|| true
155 runtest freezero	FREEZERO				|| true
156 runtest getexecname	GETEXECNAME				|| true
157 runtest getprogname	GETPROGNAME				|| true
158 runtest pledge		PLEDGE					|| true
159 runtest reallocarray	REALLOCARRAY -D_OPENBSD_SOURCE		|| true
160 runtest strlcat		STRLCAT					|| true
161 runtest strlcpy		STRLCPY					|| true
162 runtest strtonum	STRTONUM				|| true
163 runtest sys_queue	SYS_QUEUE				|| true
164 runtest unveil		UNVEIL					|| true
165 runtest vasprintf	VASPRINTF -D_GNU_SOURCE			|| true
166 runtest __progname	__PROGNAME				|| true
167 
168 if [ "${HAVE_SYS_QUEUE}" -eq 0 ]; then
169 	CFLAGS="-I ./../compat/sys ${CFLAGS}"
170 fi
171 
172 if [ -n "${COMPATS}" ]; then
173 	CFLAGS="-I ./../compat/ ${CFLAGS}"
174 fi
175 
176 exec > config.h
177 echo "config.h: writing..." >&2
178 
179 cat <<EOF
180 #ifndef CONFIG_H
181 #define CONFIG_H
182 
183 #ifdef __cplusplus
184 # error "Do not use C++: this is a C application."
185 #endif
186 
187 #define HAVE_ERR		${HAVE_ERR}
188 #define HAVE_FREEZERO		${HAVE_FREEZERO}
189 #define HAVE_GETEXECNAME	${HAVE_GETEXECNAME}
190 #define HAVE_GETPROGNAME	${HAVE_GETPROGNAME}
191 #define HAVE_PLEDGE		${HAVE_PLEDGE}
192 #define HAVE_REALLOCARRAY	${HAVE_REALLOCARRAY}
193 #define HAVE_STRLCAT		${HAVE_STRLCAT}
194 #define HAVE_STRLCPY		${HAVE_STRLCPY}
195 #define HAVE_STRTONUM		${HAVE_STRTONUM}
196 #define HAVE_SYS_QUEUE		${HAVE_SYS_QUEUE}
197 #define HAVE_UNVEIL		${HAVE_UNVEIL}
198 #define HAVE_VASPRINTF		${HAVE_VASPRINTF}
199 #define HAVE___PROGNAME		${HAVE___PROGNAME}
200 
201 #endif
202 EOF
203 
204 exec > config.mk
205 echo "config.mk: writing..." >&2
206 
207 cat <<EOF
208 CC =		${CC}
209 CFLAGS =	${CFLAGS}
210 LIBS =		${LIBS}
211 LDFLAGS =	${LDFLAGS}
212 YACC =		${YACC}
213 
214 COBJS =	${COMPATS}
215 
216 INSTALL=	install
217 INSTALL_PROGRAM=\${INSTALL} -m 0555
218 INSTALL_LIB=	\${INSTALL} -m 0444
219 INSTALL_MAN=	\${INSTALL} -m 0444
220 INSTALL_DATA=	\${INSTALL} -m 0444
221 
222 EOF
223 
224 for c in ${COMPATS}; do
225 	src="../compat/${c%.o}.c"
226 	cat <<EOF
227 $c: $src
228 	\${CC} \${CFLAGS} -c $src -o \$@
229 EOF
230 done
231 
232 echo "done!" >&2
233 echo >&2