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, CFLAGS and LDFLAGS
36 
37 CC=`printf "all:\\n\\t@echo \\\$(CC)\\n" | make ${MAKE_FLAGS} -sf -`
38 
39 if [ -z "${CFLAGS}" ]; then
40 	CFLAGS=`printf "all:\\n\\t@echo \\\$(CFLAGS)\\n" | make ${MAKE_FLAGS} -sf -`
41 fi
42 
43 CFLAGS="${CFLAGS} -W -Wall -Wextra -Wmissing-prototypes -Wstrict-prototypes"
44 CFLAGS="${CFLAGS} -Wwrite-strings -Wno-unused-parameter"
45 
46 if [ -z "${LDFLAGS}" ]; then
47 	LDFLAGS=`printf "all:\\n\\t@echo \\\$(LDFLAGS)\\n" | make ${MAKE_FLAGS} -sf -`
48 	LDFLAGS="-ltls -levent -lcrypto"
49 fi
50 
51 LD_IMSG=
52 STATIC=
53 YACC=yacc
54 
55 DISABLE_SANDBOX=0
56 
57 NEED_GNU_SOURCE=0
58 NEED_OPENBSD_SOURCE=0
59 
60 PREFIX="/usr/local"
61 BINDIR=
62 
63 INSTALL="install"
64 
65 add_cflags() {
66 	CFLAGS="${CFLAGS} $(pkg-config --cflags "$1")"
67 }
68 
69 add_ldflags() {
70 	LDFLAGS="${LDFLAGS} $(pkg-config --libs "$1")"
71 }
72 
73 # try to auto detect CFLAGS and LDFLAGS
74 if which pkg-config 2>/dev/null 1>&2; then
75 	if pkg-config libtls; then
76 		add_cflags "libtls"
77 		add_ldflags "libtls"
78 	fi
79 
80 	if pkg-config openssl; then
81 		add_cflags "openssl"
82 		add_ldflags "openssl"
83 	fi
84 
85 	case "$(uname)" in
86 		OpenBSD)
87 			# use libevent and imsg in base
88 			;;
89 		*)
90 			if pkg-config libevent; then
91 				add_cflags "libevent"
92 				add_ldflags "libevent"
93 			fi
94 
95 			if pkg-config libimsg; then
96 				add_cflags "libimsg"
97 				add_ldflags "libimsg"
98 			fi
99 			;;
100 	esac
101 
102 	case "$(uname)" in
103 		*BSD|DragonFly|Darwin)
104 			;;
105 		*)
106 			if pkg-config libbsd-ctor libbsd-overlay; then
107 				add_cflags "libbsd-ctor libbsd-overlay"
108 				add_ldflags "libbsd-ctor libbsd-overlay"
109 			fi
110 			;;
111 	esac
112 fi
113 
114 # auto detect yacc/bison
115 which ${YACC} 2>/dev/null 1>&2 || {
116 	echo "${YACC} not found: trying bison" 1>&2
117 	echo "${YACC} not found: trying bison" 1>&3
118 	YACC=bison
119 	which ${YACC} 2>/dev/null 1>&2 || {
120 		echo "${YACC} not found: giving up" 1>&2
121 		echo "${YACC} not found: giving up" 1>&3
122 	}
123 }
124 
125 # --------
126 # allow certain variables to be overridden on the command line
127 
128 for keyvals in "$@"; do
129 	if [ "$keyvals" = "--disable-sandbox" ]; then
130 		DISABLE_SANDBOX=1
131 		continue
132 	fi
133 
134 	if [ "$keyvals" = "--enable-sandbox" ]; then
135 		DISABLE_SANDBOX=0
136 		continue
137 	fi
138 
139 	key=`echo $keyvals | cut -s -d '=' -f1`
140 	if [ -z "$key" ]; then
141 		echo "$0: invalid key-value: $keyvals" 1>&2
142 		exit 1
143 	fi
144 	val=`echo $keyvals | cut -d '=' -f 2-`
145 	case "$key" in
146 		BINDIR)  BINDIR="$val" ;;
147 		CC)      CC="$val" ;;
148 		CFLAGS)  CFLAGS="$val" ;;
149 		DESTDIR) DESTDIR="$val" ;;
150 		LDFLAGS) LDFLAGS="$val" ;;
151 		PREFIX)  PREFIX="$val" ;;
152 		YACC)    YACC="$val" ;;
153 		*)
154 			echo "$0: invalid key: $key" 1>&2
155 			exit 1
156 	esac
157 done
158 
159 # --------
160 # tests functions
161 
162 # Check whether this HAVE_ setting is manually overridden.
163 # If yes, use the override, if no, do not decide anything yet.
164 # Arguments: test file name, test var name, manual value
165 ismanual() {
166 	[ -z "${3}" ] && return 1
167 	echo "tested ${1}: HAVE_${2}=${3} (manual)" 1>&2
168 	echo "tested ${1}: HAVE_${2}=${3} (manual)" 1>&3
169 	echo 1>&3
170 	return 0
171 }
172 
173 # Run a single autoconfiguration test.
174 # In case of success, enable the feature.
175 # In case of failure, do not decide anything yet.
176 # Arguments: test file name, test var name, additional CFLAGS
177 singletest() {
178 	n=${1}${3}
179 	cat 1>&3 << __HEREDOC__
180 testing ${n} ...
181 ${COMP} -o have/${1} have/${1}.c ${3} ${LDFLAGS}
182 __HEREDOC__
183 
184 	if ${COMP} -o "have/${1}" "have/${1}.c" ${3} ${LDFLAGS} 1>&3 2>&3
185 	then
186 		echo "partial result of ${n}: ${CC} succeeded" 1>&3
187 	else
188 		echo "tested ${n}: no (compilation failed)" 1>&2
189 		echo "result of ${n}: ${CC} failed with exit status $?" 1>&3
190 		echo "result of compiling ${n}: no" 1>&3
191 		echo 1>&3
192 		return 1
193 	fi
194 
195 	if ./have/${1} 1>&3 2>&3; then
196 		echo "tested ${n}: yes" 1>&2
197 		echo "result of running ${n}: yes" 1>&3
198 		echo 1>&3
199 		eval HAVE_${2}=1
200 		[ "${3}" = "-D_GNU_SOURCE" ] && NEED_GNU_SOURCE=1
201 		[ "${3}" = "-D_OPENBSD_SOURCE" ] && NEED_OPENBSD_SOURCE=1
202 		[ "${3}" = "-lutil" ] && LD_IMSG="-lutil"
203 		rm "have/${1}"
204 		return 0
205 	else
206 		echo "tested ${n}: no (execution failed)" 1>&2
207 		echo "result of ${n}: execution failed with exit status $?" 1>&3
208 		echo "result of running ${n}: no" 1>&3
209 		echo 1>&3
210 		rm "have/${1}"
211 		return 1
212 	fi
213 }
214 
215 # Run a complete autoconfiguration test, including the check for
216 # a manual override and disabling the feature on failure.
217 # Arguments: test file name, test var name, additional CFLAGS
218 # The final argument can optionally be repeated a second time.
219 runtest() {
220 	eval _manual=\${HAVE_${2}}
221 	ismanual "${1}" "${2}" "${_manual}" && return 0
222 	singletest "${1}" "${2}" "${3}" && return 0
223 	[ -n "${4}" ] && singletest "${1}" "${2}" "${4}" && return 0
224 	eval HAVE_${2}=0
225 	return 1
226 }
227 
228 # --------
229 # compiler options
230 
231 COMP="${CC} ${CFLAGS} -Wno-unused -Werror"
232 
233 echo "selected CFLAGS=\"${CFLAGS}\"" 1>&2
234 echo "selected CFLAGS=\"${CFLAGS}\"" 1>&3
235 echo 1>&3
236 
237 if [ -n "${STATIC}" ]; then
238 	echo "selected STATIC=\"${STATIC}\" (manual)" 1>&2
239 	echo "selected STATIC=\"${STATIC}\" (manual)" 1>&3
240 	echo 1>&3
241 else
242 	runtest noop STATIC -static || true
243 	[ ${HAVE_STATIC} -eq 0 ] || STATIC="-static"
244 	echo "selected STATIC=\"${STATIC}\"" 1>&2
245 	echo "selected STATIC=\"${STATIC}\"" 1>&3
246 	echo 1>&3
247 fi
248 
249 # --------
250 # tests for config.h
251 
252 runtest err		ERR		|| true
253 runtest explicit_bzero	EXPLICIT_BZERO	|| true
254 runtest freezero	FREEZERO	|| true
255 runtest getdtablesize	GETDTABLESIZE	|| true
256 runtest getdtablecount	GETDTABLECOUNT	|| true
257 runtest getprogname	GETPROGNAME	|| true
258 runtest imsg		IMSG		-lutil || true
259 runtest libevent	LIBEVENT	|| true
260 runtest libtls		LIBTLS		|| true
261 runtest openssl		OPENSSL		|| true
262 runtest pr_set_name	PR_SET_NAME	|| true
263 runtest program_invocation_short_name PROGRAM_INVOCATION_SHORT_NAME "" -D_GNU_SOURCE || true
264 runtest queue_h		QUEUE_H		|| true
265 runtest reallocarray	REALLOCARRAY	|| true
266 runtest recallocarray	RECALLOCARRAY	|| true
267 runtest setproctitle	SETPROCTITLE	|| true
268 runtest strlcat		STRLCAT		|| true
269 runtest strlcpy		STRLCPY		|| true
270 runtest strtonum	STRTONUM	|| true
271 runtest vasprintf	VASPRINTF	"" -D_GNU_SOURCE || true
272 
273 if [ ${HAVE_LIBTLS} -eq 0 ]; then
274 	echo "FATAL: libtls not found" 1>&2
275 	echo "FATAL: libtls not found" 1>&3
276 	exit 1
277 fi
278 
279 if [ ${HAVE_OPENSSL} -eq 0 ]; then
280 	echo "FATAL: openssl not found" 1>&2
281 	echo "FATAL: openssl not found" 1>&3
282 	exit 1
283 fi
284 
285 if [ ${HAVE_LIBEVENT} -eq 0 ]; then
286 	echo "FATAL: libevent not found" 1>&2
287 	echo "FATAL: libevent not found" 1>&3
288 	exit 1
289 fi
290 
291 if [ ${HAVE_QUEUE_H} -eq 0 -o ${HAVE_IMSG} -eq 0 ]; then
292 	CFLAGS="${CFLAGS} -I ${PWD}/compat"
293 fi
294 
295 # --------
296 # write config.h
297 
298 exec > config.h
299 
300 cat <<__HEREDOC__
301 #ifdef __cplusplus
302 #error "Do not use C++."
303 #endif
304 __HEREDOC__
305 
306 [ ${NEED_GNU_SOURCE} -eq 0 ] || echo "#define _GNU_SOURCE"
307 [ ${NEED_OPENBSD_SOURCE} -eq 0 ] || echo "#define _OPENBSD_SOURCE"
308 
309 [ ${HAVE_STRLCAT} -eq 0 -o ${HAVE_STRLCPY} -eq 0 -o ${HAVE_IMSG} -eq 0 ] \
310 	&& echo "#include <sys/types.h>"
311 [ ${HAVE_VASPRINTF} -eq 0 ] && echo "#include <stdarg.h>"
312 
313 if [ ${HAVE_QUEUE_H} -eq 1 ]; then
314 	echo "#include <sys/queue.h>"
315 else
316 	echo "#include <queue.h>"
317 fi
318 
319 echo "#include <sys/types.h>"
320 echo "#include <sys/uio.h>"
321 echo "#include <stdint.h>"
322 echo "#include <imsg.h>"
323 
324 cat <<__HEREDOC__
325 
326 #define DISABLE_SANDBOX		${DISABLE_SANDBOX}
327 
328 #define HAVE_ERR		${HAVE_ERR}
329 #define HAVE_EXPLICIT_BZERO	${HAVE_EXPLICIT_BZERO}
330 #define HAVE_FREEZERO		${HAVE_FREEZERO}
331 #define HAVE_GETDTABLECOUNT	${HAVE_GETDTABLECOUNT}
332 #define HAVE_GETDTABLESIZE	${HAVE_GETDTABLESIZE}
333 #define HAVE_GETPROGNAME	${HAVE_GETPROGNAME}
334 #define HAVE_IMSG		${HAVE_IMSG}
335 #define HAVE_LIBEVENT		${HAVE_LIBEVENT}
336 #define HAVE_PROGRAM_INVOCATION_SHORT_NAME ${HAVE_PROGRAM_INVOCATION_SHORT_NAME}
337 #define HAVE_PR_SET_NAME	${HAVE_PR_SET_NAME}
338 #define HAVE_QUEUE_H		${HAVE_QUEUE_H}
339 #define HAVE_REALLOCARRAY	${HAVE_REALLOCARRAY}
340 #define HAVE_RECALLOCARRAY	${HAVE_RECALLOCARRAY}
341 #define HAVE_SETPROCTITLE	${HAVE_SETPROCTITLE}
342 #define HAVE_STRLCAT		${HAVE_STRLCAT}
343 #define HAVE_STRLCPY		${HAVE_STRLCPY}
344 #define HAVE_STRTONUM		${HAVE_STRTONUM}
345 #define HAVE_VASPRINTF		${HAVE_VASPRINTF}
346 
347 __HEREDOC__
348 
349 [ ${HAVE_EXPLICIT_BZERO} -eq 0 -o \
350   ${HAVE_FREEZERO} -eq 0 -o \
351   ${HAVE_REALLOCARRAY} -eq 0 -o \
352   ${HAVE_RECALLOCARRAY} -eq 0 -o \
353   ${HAVE_STRLCAT} -eq 0 -o \
354   ${HAVE_STRLCPY} -eq 0 -o \
355   ${HAVE_STRTONUM} -eq 0 ] && echo "#include <stddef.h>"
356 
357 if [ ${HAVE_ERR} -eq 0 ]; then
358 	echo "extern	void	 err(int, const char*, ...);"
359 	echo "extern	void	 errx(int, const char*, ...);"
360 	echo "extern	void	 warn(const char*, ...);"
361 	echo "extern	void	 warnx(const char*, ...);"
362 	COMPAT="${COMPAT} compat/err.o"
363 else
364 	echo "#include <err.h>"
365 fi
366 if [ ${HAVE_EXPLICIT_BZERO} -eq 0 ]; then
367 	echo "extern	void	 explicit_bzero(void*, size_t);"
368 	COMPAT="${COMPAT} compat/explicit_bzero.o"
369 fi
370 if [ ${HAVE_FREEZERO} -eq 0 ]; then
371 	echo "extern	void	 freezero(void*, size_t);"
372 	COMPAT="${COMPAT} compat/freezero.o"
373 fi
374 if [ ${HAVE_GETDTABLECOUNT} -eq 0 ]; then
375 	echo "extern	int	 getdtablecount(void);"
376 	COMPAT="${COMPAT} compat/getdtablecount.o"
377 fi
378 if [ ${HAVE_GETDTABLESIZE} -eq 0 ]; then
379 	echo "extern	int	 getdtablesize(void);"
380 	COMPAT="${COMPAT} compat/getdtablesize.o"
381 fi
382 if [ ${HAVE_GETPROGNAME} -eq 0 ]; then
383 	echo "extern	const char *getprogname(void);"
384 	COMPAT="${COMPAT} compat/getprogname.o"
385 fi
386 if [ ${HAVE_IMSG} -eq 0 ]; then
387 	COMPAT="${COMPAT} compat/imsg.o compat/imsg-buffer.o"
388 fi
389 if [ ${HAVE_REALLOCARRAY} -eq 0 ]; then
390 	echo "extern	void	*reallocarray(void*, size_t, size_t);"
391 	COMPAT="${COMPAT} compat/reallocarray.o"
392 fi
393 if [ ${HAVE_RECALLOCARRAY} -eq 0 ]; then
394 	echo "extern	void	*recallocarray(void*, size_t, size_t, size_t);"
395 	COMPAT="${COMPAT} compat/recallocarray.o"
396 fi
397 if [ ${HAVE_SETPROCTITLE} -eq 0 ]; then
398 	echo "extern	void	 setproctitle(const char *fmt, ...);"
399 	COMPAT="${COMPAT} compat/setproctitle.o"
400 fi
401 if [ ${HAVE_STRLCAT} -eq 0 ]; then
402 	echo "extern	size_t	 strlcat(char*, const char*, size_t);"
403 	COMPAT="${COMPAT} compat/strlcat.o"
404 fi
405 if [ ${HAVE_STRLCPY} -eq 0 ]; then
406 	echo "extern	size_t	 strlcpy(char*, const char*, size_t);"
407 	COMPAT="${COMPAT} compat/strlcpy.o"
408 fi
409 if [ ${HAVE_STRTONUM} -eq 0 ]; then
410 	echo "extern	long long strtonum(const char*, long long, long long, const char**);"
411 	COMPAT="${COMPAT} compat/strtonum.o"
412 fi
413 if [ ${HAVE_VASPRINTF} -eq 0 ]; then
414 	echo "extern	int	 vasprintf(char**, const char*, va_list);"
415 	COMPAT="${COMPAT} compat/vasprintf.o"
416 fi
417 echo "file config.h: written" 1>&2
418 echo "file config.h: written" 1>&3
419 
420 # --------
421 # tests for Makefile.local
422 
423 exec > Makefile.local
424 
425 [ -z "${BINDIR}"          ] && BINDIR="${PREFIX}/bin"
426 [ -z "${MANDIR}"          ] && MANDIR="${PREFIX}/man"
427 
428 [ -z "${INSTALL_PROGRAM}" ] && INSTALL_PROGRAM="${INSTALL} -m 0555"
429 [ -z "${INSTALL_LIB}"     ] && INSTALL_LIB="${INSTALL} -m 0444"
430 [ -z "${INSTALL_MAN}"     ] && INSTALL_MAN="${INSTALL} -m 0444"
431 [ -z "${INSTALL_DATA}"    ] && INSTALL_DATA="${INSTALL} -m 0444"
432 
433 cat << __HEREDOC__
434 CC		= ${CC}
435 CFLAGS		= ${CFLAGS}
436 LDFLAGS		= ${LDFLAGS} ${LD_IMSG}
437 YACC		= ${YACC}
438 STATIC		= ${STATIC}
439 PREFIX		= ${PREFIX}
440 BINDIR		= ${BINDIR}
441 MANDIR		= ${MANDIR}
442 INCLUDEDIR	= ${INCLUDEDIR}
443 INSTALL		= ${INSTALL}
444 INSTALL_PROGRAM	= ${INSTALL_PROGRAM}
445 INSTALL_LIB	= ${INSTALL_LIB}
446 INSTALL_MAN	= ${INSTALL_MAN}
447 INSTALL_DATA	= ${INSTALL_DATA}
448 
449 __HEREDOC__
450 
451 printf "COMPAT ="
452 for comp in ${COMPAT}; do
453 	printf " %s/%s" "$PWD" "$comp"
454 done
455 printf "\n"
456 
457 echo "file Makefile.local: written" 1>&2
458 echo "file Makefile.local: written" 1>&3
459 
460 exit 0