1 #!/bin/sh
2 #
3 # Copyright (c) 2021 Omar Polo <op@omarpolo.com>
4 #
5 # Permission to use, copy, modify, and distribute this software for any
6 # purpose with or without fee is hereby granted, provided that the above
7 # copyright notice and this permission notice appear in all copies.
8 #
9 # THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 # WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 # MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 # ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 # WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 # ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 # OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 
17 # adapted from mandoc configure and oconfigure, thanks schwarze@ and
18 # kristaps@!
19 
20 set -e
21 
22 [ -w config.log ] && mv config.log config.log.old
23 [ -w config.h   ] && mv config.h   config.h.old
24 
25 # Output file descriptor usage:
26 # 1 (stdout): config.h, Makefile.local
27 # 2 (stderr): original stderr, usually to the console
28 # 3: config.log
29 
30 exec 3> config.log
31 echo "file config.log: writing..."
32 
33 # --------
34 # default settings: initialize all vars here such that nothing is
35 # leaked from the environment except for CC and CFLAGS
36 
37 CC=`printf "all:\\n\\t@echo \\\$(CC)\\n" | make ${MAKE_FLAGS} -sf -`
38 CFLAGS=`printf "all:\\n\\t@echo \\\$(CFLAGS)\\n" | make ${MAKE_FLAGS} -sf -`
39 CFLAGS="${CFLAGS} -g -W -Wall -Wextra -Wmissing-prototypes -Wstrict-prototypes"
40 CFLAGS="${CFLAGS} -Wwrite-strings -Wno-unused-parameter"
41 LDFLAGS="-ltls -levent"
42 LD_IMSG=
43 STATIC=
44 YACC=yacc
45 
46 NEED_GNU_SOURCE=0
47 NEED_OPENBSD_SOURCE=0
48 
49 PREFIX="/usr/local"
50 BINDIR=
51 
52 INSTALL="install"
53 
54 # try to auto detect CFLAGS and LDFLAGS
55 if which pkg-config 2>/dev/null 1>&2; then
56 	if pkg-config libtls; then
57 		CFLAGS="${CFLAGS} $(pkg-config --cflags libtls)"
58 		LDFLAGS="$(pkg-config --libs libtls)"
59 	fi
60 	if pkg-config openssl; then
61 		CFLAGS="${CFLAGS} $(pkg-config --cflags openssl)"
62 		LDFLAGS="${LDFLAGS} $(pkg-config --libs openssl)"
63 	fi
64 
65 	case "$(uname)" in
66 		OpenBSD) ;;
67 		*)
68 			if pkg-config libevent; then
69 				CFLAGS="${CFLAGS} $(pkg-config --cflags libevent)"
70 				LDFLAGS="${LDFLAGS} $(pkg-config --libs libevent)"
71 			fi
72 			;;
73 	esac
74 fi
75 
76 # auto detect yacc/bison
77 which ${YACC} 2>/dev/null 1>&2 || {
78 	echo "${YACC} not found: trying bison" 1>&2
79 	echo "${YACC} not found: trying bison" 1>&3
80 	YACC=bison
81 	which ${YACC} 2>/dev/null 1>&2 || {
82 		echo "${YACC} not found: giving up" 1>&2
83 		echo "${YACC} not found: giving up" 1>&3
84 	}
85 }
86 
87 # --------
88 # allow certain variables to be overridden on the command line
89 
90 for keyvals in "$@"; do
91 	key=`echo $keyvals | cut -s -d '=' -f1`
92 	if [ -z "$key" ]; then
93 		echo "$0: invalid key-value: $keyvals" 1>&2
94 		exit 1
95 	fi
96 	val=`echo $keyvals | cut -d '=' -f 2-`
97 	case "$key" in
98 		BINDIR)  BINDIR="$val" ;;
99 		CC)      CC="$val" ;;
100 		CFLAGS)  CFLAGS="$val" ;;
101 		DESTDIR) DESTDIR="$val" ;;
102 		LDFLAGS) LDFLAGS="$val" ;;
103 		PREFIX)  PREFIX="$val" ;;
104 		YACC)    YACC="$val" ;;
105 		*)
106 			echo "$0: invalid key: $key" 1>&2
107 			exit 1
108 	esac
109 done
110 
111 # --------
112 # tests functions
113 
114 # Check whether this HAVE_ setting is manually overridden.
115 # If yes, use the override, if no, do not decide anything yet.
116 # Arguments: test file name, test var name, manual value
117 ismanual() {
118 	[ -z "${3}" ] && return 1
119 	echo "tested ${1}: HAVE_${2}=${3} (manual)" 1>&2
120 	echo "tested ${1}: HAVE_${2}=${3} (manual)" 1>&3
121 	echo 1>&3
122 	return 0
123 }
124 
125 # Run a single autoconfiguration test.
126 # In case of success, enable the feature.
127 # In case of failure, do not decide anything yet.
128 # Arguments: test file name, test var name, additional CFLAGS
129 singletest() {
130 	n=${1}${3}
131 	cat 1>&3 << __HEREDOC__
132 testing ${n} ...
133 ${COMP} -o have/${1} have/${1}.c ${3} ${LDFLAGS}
134 __HEREDOC__
135 
136 	if ${COMP} -o "have/${1}" "have/${1}.c" ${3} ${LDFLAGS} 1>&3 2>&3
137 	then
138 		echo "partial result of ${n}: ${CC} succeeded" 1>&3
139 	else
140 		echo "tested ${n}: no (compilation failed)" 1>&2
141 		echo "result of ${n}: ${CC} failed with exit status $?" 1>&3
142 		echo "result of compiling ${n}: no" 1>&3
143 		echo 1>&3
144 		return 1
145 	fi
146 
147 	if ./have/${1} 1>&3 2>&3; then
148 		echo "tested ${n}: yes" 1>&2
149 		echo "result of running ${n}: yes" 1>&3
150 		echo 1>&3
151 		eval HAVE_${2}=1
152 		[ "${3}" = "-D_GNU_SOURCE" ] && NEED_GNU_SOURCE=1
153 		[ "${3}" = "-D_OPENBSD_SOURCE" ] && NEED_OPENBSD_SOURCE=1
154 		[ "${3}" = "-lutil" ] && LD_IMSG="-lutil"
155 		rm "have/${1}"
156 		return 0
157 	else
158 		echo "tested ${n}: no (execution failed)" 1>&2
159 		echo "result of ${n}: execution failed with exit status $?" 1>&3
160 		echo "result of running ${n}: no" 1>&3
161 		echo 1>&3
162 		rm "have/${1}"
163 		return 1
164 	fi
165 }
166 
167 # Run a complete autoconfiguration test, including the check for
168 # a manual override and disabling the feature on failure.
169 # Arguments: test file name, test var name, additional CFLAGS
170 # The final argument can optionally be repeated a second time.
171 runtest() {
172 	eval _manual=\${HAVE_${2}}
173 	ismanual "${1}" "${2}" "${_manual}" && return 0
174 	singletest "${1}" "${2}" "${3}" && return 0
175 	[ -n "${4}" ] && singletest "${1}" "${2}" "${4}" && return 0
176 	eval HAVE_${2}=0
177 	return 1
178 }
179 
180 # --------
181 # compiler options
182 
183 COMP="${CC} ${CFLAGS} -Wno-unused -Werror"
184 
185 echo "selected CFLAGS=\"${CFLAGS}\"" 1>&2
186 echo "selected CFLAGS=\"${CFLAGS}\"" 1>&3
187 echo 1>&3
188 
189 if [ -n "${STATIC}" ]; then
190 	echo "selected STATIC=\"${STATIC}\" (manual)" 1>&2
191 	echo "selected STATIC=\"${STATIC}\" (manual)" 1>&3
192 	echo 1>&3
193 else
194 	runtest noop STATIC -static || true
195 	[ ${HAVE_STATIC} -eq 0 ] || STATIC="-static"
196 	echo "selected STATIC=\"${STATIC}\"" 1>&2
197 	echo "selected STATIC=\"${STATIC}\"" 1>&3
198 	echo 1>&3
199 fi
200 
201 # --------
202 # tests for config.h
203 
204 runtest err		ERR		|| true
205 runtest explicit_bzero	EXPLICIT_BZERO	|| true
206 runtest freezero	FREEZERO	|| true
207 runtest getdtablesize	GETDTABLESIZE	|| true
208 runtest getdtablecount	GETDTABLECOUNT	|| true
209 runtest getprogname	GETPROGNAME	|| true
210 runtest imsg		IMSG		-lutil || true
211 runtest libevent	LIBEVENT	|| true
212 runtest libtls		LIBTLS		|| true
213 runtest openssl		OPENSSL		|| true
214 runtest pr_set_name	PR_SET_NAME	|| true
215 runtest program_invocation_short_name PROGRAM_INVOCATION_SHORT_NAME "" -D_GNU_SOURCE || true
216 runtest queue_h		QUEUE_H		|| true
217 runtest reallocarray	REALLOCARRAY	|| true
218 runtest recallocarray	RECALLOCARRAY	|| true
219 runtest setproctitle	SETPROCTITLE	|| true
220 runtest strlcat		STRLCAT		|| true
221 runtest strlcpy		STRLCPY		|| true
222 runtest strtonum	STRTONUM	|| true
223 runtest vasprintf	VASPRINTF	"" -D_GNU_SOURCE || true
224 
225 if [ ${HAVE_LIBTLS} -eq 0 ]; then
226 	echo "FATAL: libtls not found" 1>&2
227 	echo "FATAL: libtls not found" 1>&3
228 	exit 1
229 fi
230 
231 if [ ${HAVE_OPENSSL} -eq 0 ]; then
232 	echo "FATAL: openssl not found" 1>&2
233 	echo "FATAL: openssl not found" 1>&3
234 	exit 1
235 fi
236 
237 if [ ${HAVE_LIBEVENT} -eq 0 ]; then
238 	echo "FATAL: libevent not found" 1>&2
239 	echo "FATAL: libevent not found" 1>&3
240 	exit 1
241 fi
242 
243 if [ ${HAVE_QUEUE_H} -eq 0 -o ${HAVE_IMSG} -eq 0 ]; then
244 	CFLAGS="${CFLAGS} -I ${PWD}/compat"
245 fi
246 
247 # --------
248 # write config.h
249 
250 exec > config.h
251 
252 cat <<__HEREDOC__
253 #ifdef __cplusplus
254 #error "Do not use C++."
255 #endif
256 __HEREDOC__
257 
258 [ ${NEED_GNU_SOURCE} -eq 0 ] || echo "#define _GNU_SOURCE"
259 [ ${NEED_OPENBSD_SOURCE} -eq 0 ] || echo "#define _OPENBSD_SOURCE"
260 
261 [ ${HAVE_STRLCAT} -eq 0 -o ${HAVE_STRLCPY} -eq 0 -o ${HAVE_IMSG} -eq 0 ] \
262 	&& echo "#include <sys/types.h>"
263 [ ${HAVE_VASPRINTF} -eq 0 ] && echo "#include <stdarg.h>"
264 
265 if [ ${HAVE_QUEUE_H} -eq 1 ]; then
266 	echo "#include <sys/queue.h>"
267 else
268 	echo "#include <queue.h>"
269 fi
270 
271 echo "#include <sys/types.h>"
272 echo "#include <sys/uio.h>"
273 echo "#include <stdint.h>"
274 echo "#include <imsg.h>"
275 
276 cat <<__HEREDOC__
277 
278 #define HAVE_ERR		${HAVE_ERR}
279 #define HAVE_EXPLICIT_BZERO	${HAVE_EXPLICIT_BZERO}
280 #define HAVE_FREEZERO		${HAVE_FREEZERO}
281 #define HAVE_GETDTABLECOUNT	${HAVE_GETDTABLECOUNT}
282 #define HAVE_GETDTABLESIZE	${HAVE_GETDTABLESIZE}
283 #define HAVE_GETPROGNAME	${HAVE_GETPROGNAME}
284 #define HAVE_IMSG		${HAVE_IMSG}
285 #define HAVE_LIBEVENT		${HAVE_LIBEVENT}
286 #define HAVE_PROGRAM_INVOCATION_SHORT_NAME ${HAVE_PROGRAM_INVOCATION_SHORT_NAME}
287 #define HAVE_PR_SET_NAME	${HAVE_PR_SET_NAME}
288 #define HAVE_QUEUE_H		${HAVE_QUEUE_H}
289 #define HAVE_REALLOCARRAY	${HAVE_REALLOCARRAY}
290 #define HAVE_RECALLOCARRAY	${HAVE_RECALLOCARRAY}
291 #define HAVE_SETPROCTITLE	${HAVE_SETPROCTITLE}
292 #define HAVE_STRLCAT		${HAVE_STRLCAT}
293 #define HAVE_STRLCPY		${HAVE_STRLCPY}
294 #define HAVE_STRTONUM		${HAVE_STRTONUM}
295 #define HAVE_VASPRINTF		${HAVE_VASPRINTF}
296 
297 __HEREDOC__
298 
299 [ ${HAVE_EXPLICIT_BZERO} -eq 0 -o \
300   ${HAVE_FREEZERO} -eq 0 -o \
301   ${HAVE_REALLOCARRAY} -eq 0 -o \
302   ${HAVE_RECALLOCARRAY} -eq 0 -o \
303   ${HAVE_STRLCAT} -eq 0 -o \
304   ${HAVE_STRLCPY} -eq 0 -o \
305   ${HAVE_STRTONUM} -eq 0 ] && echo "#include <stddef.h>"
306 
307 if [ ${HAVE_ERR} -eq 0 ]; then
308 	echo "extern	void	 err(int, const char*, ...);"
309 	echo "extern	void	 errx(int, const char*, ...);"
310 	echo "extern	void	 warn(const char*, ...);"
311 	echo "extern	void	 warnx(const char*, ...);"
312 	COMPAT="${COMPAT} compat/err.o"
313 else
314 	echo "#include <err.h>"
315 fi
316 if [ ${HAVE_EXPLICIT_BZERO} -eq 0 ]; then
317 	echo "extern	void	 explicit_bzero(void*, size_t);"
318 	COMPAT="${COMPAT} compat/explicit_bzero.o"
319 fi
320 if [ ${HAVE_FREEZERO} -eq 0 ]; then
321 	echo "extern	void	 freezero(void*, size_t);"
322 	COMPAT="${COMPAT} compat/freezero.o"
323 fi
324 if [ ${HAVE_GETDTABLECOUNT} -eq 0 ]; then
325 	echo "extern	int	 getdtablecount(void);"
326 	COMPAT="${COMPAT} compat/getdtablecount.o"
327 fi
328 if [ ${HAVE_GETDTABLESIZE} -eq 0 ]; then
329 	echo "extern	int	 getdtablesize(void);"
330 	COMPAT="${COMPAT} compat/getdtablesize.o"
331 fi
332 if [ ${HAVE_GETPROGNAME} -eq 0 ]; then
333 	echo "extern	const char *getprogname(void);"
334 	COMPAT="${COMPAT} compat/getprogname.o"
335 fi
336 if [ ${HAVE_IMSG} -eq 0 ]; then
337 	COMPAT="${COMPAT} compat/imsg.o compat/imsg-buffer.o"
338 fi
339 if [ ${HAVE_REALLOCARRAY} -eq 0 ]; then
340 	echo "extern	void	*reallocarray(void*, size_t, size_t);"
341 	COMPAT="${COMPAT} compat/reallocarray.o"
342 fi
343 if [ ${HAVE_RECALLOCARRAY} -eq 0 ]; then
344 	echo "extern	void	*recallocarray(void*, size_t, size_t, size_t);"
345 	COMPAT="${COMPAT} compat/recallocarray.o"
346 fi
347 if [ ${HAVE_SETPROCTITLE} -eq 0 ]; then
348 	echo "extern	void	 setproctitle(const char *fmt, ...);"
349 	COMPAT="${COMPAT} compat/setproctitle.o"
350 fi
351 if [ ${HAVE_STRLCAT} -eq 0 ]; then
352 	echo "extern	size_t	 strlcat(char*, const char*, size_t);"
353 	COMPAT="${COMPAT} compat/strlcat.o"
354 fi
355 if [ ${HAVE_STRLCPY} -eq 0 ]; then
356 	echo "extern	size_t	 strlcpy(char*, const char*, size_t);"
357 	COMPAT="${COMPAT} compat/strlcpy.o"
358 fi
359 if [ ${HAVE_STRTONUM} -eq 0 ]; then
360 	echo "extern	long long strtonum(const char*, long long, long long, const char**);"
361 	COMPAT="${COMPAT} compat/strtonum.o"
362 fi
363 if [ ${HAVE_VASPRINTF} -eq 0 ]; then
364 	echo "extern	int	 vasprintf(char**, const char*, va_list);"
365 	COMPAT="${COMPAT} compat/vasprintf.o"
366 fi
367 echo "file config.h: written" 1>&2
368 echo "file config.h: written" 1>&3
369 
370 # --------
371 # tests for Makefile.local
372 
373 exec > Makefile.local
374 
375 [ -z "${BINDIR}"          ] && BINDIR="${PREFIX}/bin"
376 [ -z "${MANDIR}"          ] && MANDIR="${PREFIX}/man"
377 
378 [ -z "${INSTALL_PROGRAM}" ] && INSTALL_PROGRAM="${INSTALL} -m 0555"
379 [ -z "${INSTALL_LIB}"     ] && INSTALL_LIB="${INSTALL} -m 0444"
380 [ -z "${INSTALL_MAN}"     ] && INSTALL_MAN="${INSTALL} -m 0444"
381 [ -z "${INSTALL_DATA}"    ] && INSTALL_DATA="${INSTALL} -m 0444"
382 
383 cat << __HEREDOC__
384 CC		= ${CC}
385 CFLAGS		= ${CFLAGS}
386 LDFLAGS		= ${LDFLAGS} ${LD_IMSG}
387 YACC		= ${YACC}
388 STATIC		= ${STATIC}
389 PREFIX		= ${PREFIX}
390 BINDIR		= ${BINDIR}
391 MANDIR		= ${MANDIR}
392 INCLUDEDIR	= ${INCLUDEDIR}
393 INSTALL		= ${INSTALL}
394 INSTALL_PROGRAM	= ${INSTALL_PROGRAM}
395 INSTALL_LIB	= ${INSTALL_LIB}
396 INSTALL_MAN	= ${INSTALL_MAN}
397 INSTALL_DATA	= ${INSTALL_DATA}
398 
399 __HEREDOC__
400 
401 printf "COMPAT ="
402 for comp in ${COMPAT}; do
403 	printf " %s/%s" "$PWD" "$comp"
404 done
405 printf "\n"
406 
407 echo "file Makefile.local: written" 1>&2
408 echo "file Makefile.local: written" 1>&3
409 
410 exit 0