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 VERSION=1.7.4
38 
39 CC=`printf "all:\\n\\t@echo \\\$(CC)\\n" | make ${MAKE_FLAGS} -sf -`
40 
41 if [ -z "${CFLAGS}" ]; then
42 	CFLAGS=`printf "all:\\n\\t@echo \\\$(CFLAGS)\\n" | make ${MAKE_FLAGS} -sf -`
43 fi
44 
45 CFLAGS="${CFLAGS} -W -Wall -Wextra -Wmissing-prototypes -Wstrict-prototypes"
46 CFLAGS="${CFLAGS} -Wwrite-strings -Wno-unused-parameter"
47 
48 if [ -z "${LDFLAGS}" ]; then
49 	LDFLAGS=`printf "all:\\n\\t@echo \\\$(LDFLAGS)\\n" | make ${MAKE_FLAGS} -sf -`
50 	LDFLAGS="-ltls -levent -lcrypto"
51 fi
52 
53 LD_IMSG=
54 STATIC=
55 YACC=yacc
56 
57 DISABLE_SANDBOX=0
58 
59 NEED_GNU_SOURCE=0
60 NEED_OPENBSD_SOURCE=0
61 
62 PREFIX="/usr/local"
63 BINDIR=
64 
65 INSTALL="install"
66 
67 add_library() {
68 	if pkg-config "$1"; then
69 		CFLAGS="${CFLAGS} $(pkg-config --cflags "$1")"
70 		LDFLAGS="${LDFLAGS} $(pkg-config --libs "$1")"
71 	fi
72 }
73 
74 # try to auto detect CFLAGS and LDFLAGS
75 if which pkg-config 2>/dev/null 1>&2; then
76 	add_library "libtls"
77 	add_library "openssl"
78 
79 	case "$(uname)" in
80 		OpenBSD)
81 			# use libevent and imsg in base
82 			;;
83 		*)
84 			add_library "libevent"
85 			add_library "libimsg"
86 			;;
87 	esac
88 
89 	case "$(uname)" in
90 		*BSD|DragonFly|Darwin)
91 			;;
92 		*)
93 			add_library "libbsd-ctor libbsd-overlay"
94 			;;
95 	esac
96 fi
97 
98 # auto detect yacc/bison
99 which ${YACC} 2>/dev/null 1>&2 || {
100 	echo "${YACC} not found: trying bison" 1>&2
101 	echo "${YACC} not found: trying bison" 1>&3
102 	YACC=bison
103 	which ${YACC} 2>/dev/null 1>&2 || {
104 		echo "${YACC} not found: giving up" 1>&2
105 		echo "${YACC} not found: giving up" 1>&3
106 	}
107 }
108 
109 # --------
110 # allow certain variables to be overridden on the command line
111 
112 for keyvals in "$@"; do
113 	if [ "$keyvals" = "--disable-sandbox" ]; then
114 		DISABLE_SANDBOX=1
115 		continue
116 	fi
117 
118 	if [ "$keyvals" = "--enable-sandbox" ]; then
119 		DISABLE_SANDBOX=0
120 		continue
121 	fi
122 
123 	key=`echo $keyvals | cut -s -d '=' -f1`
124 	if [ -z "$key" ]; then
125 		echo "$0: invalid key-value: $keyvals" 1>&2
126 		exit 1
127 	fi
128 	val=`echo $keyvals | cut -d '=' -f 2-`
129 	case "$key" in
130 		BINDIR)  BINDIR="$val" ;;
131 		CC)      CC="$val" ;;
132 		CFLAGS)  CFLAGS="$val" ;;
133 		DESTDIR) DESTDIR="$val" ;;
134 		LDFLAGS) LDFLAGS="$val" ;;
135 		PREFIX)  PREFIX="$val" ;;
136 		YACC)    YACC="$val" ;;
137 		*)
138 			echo "$0: invalid key: $key" 1>&2
139 			exit 1
140 	esac
141 done
142 
143 # --------
144 # tests functions
145 
146 # Check whether this HAVE_ setting is manually overridden.
147 # If yes, use the override, if no, do not decide anything yet.
148 # Arguments: test file name, test var name, manual value
149 ismanual() {
150 	[ -z "${3}" ] && return 1
151 	echo "tested ${1}: HAVE_${2}=${3} (manual)" 1>&2
152 	echo "tested ${1}: HAVE_${2}=${3} (manual)" 1>&3
153 	echo 1>&3
154 	return 0
155 }
156 
157 # Run a single autoconfiguration test.
158 # In case of success, enable the feature.
159 # In case of failure, do not decide anything yet.
160 # Arguments: test file name, test var name, additional CFLAGS
161 singletest() {
162 	n=${1}${3}
163 	cat 1>&3 << __HEREDOC__
164 testing ${n} ...
165 ${COMP} -o have/${1} have/${1}.c ${3} ${LDFLAGS}
166 __HEREDOC__
167 
168 	if ${COMP} -o "have/${1}" "have/${1}.c" ${3} ${LDFLAGS} 1>&3 2>&3
169 	then
170 		echo "partial result of ${n}: ${CC} succeeded" 1>&3
171 	else
172 		echo "tested ${n}: no (compilation failed)" 1>&2
173 		echo "result of ${n}: ${CC} failed with exit status $?" 1>&3
174 		echo "result of compiling ${n}: no" 1>&3
175 		echo 1>&3
176 		return 1
177 	fi
178 
179 	if ./have/${1} 1>&3 2>&3; then
180 		echo "tested ${n}: yes" 1>&2
181 		echo "result of running ${n}: yes" 1>&3
182 		echo 1>&3
183 		eval HAVE_${2}=1
184 		[ "${3}" = "-D_GNU_SOURCE" ] && NEED_GNU_SOURCE=1
185 		[ "${3}" = "-D_OPENBSD_SOURCE" ] && NEED_OPENBSD_SOURCE=1
186 		[ "${3}" = "-lutil" ] && LD_IMSG="-lutil"
187 		rm "have/${1}"
188 		return 0
189 	else
190 		echo "tested ${n}: no (execution failed)" 1>&2
191 		echo "result of ${n}: execution failed with exit status $?" 1>&3
192 		echo "result of running ${n}: no" 1>&3
193 		echo 1>&3
194 		rm "have/${1}"
195 		return 1
196 	fi
197 }
198 
199 # Run a complete autoconfiguration test, including the check for
200 # a manual override and disabling the feature on failure.
201 # Arguments: test file name, test var name, additional CFLAGS
202 # The final argument can optionally be repeated a second time.
203 runtest() {
204 	eval _manual=\${HAVE_${2}}
205 	ismanual "${1}" "${2}" "${_manual}" && return 0
206 	singletest "${1}" "${2}" "${3}" && return 0
207 	[ -n "${4}" ] && singletest "${1}" "${2}" "${4}" && return 0
208 	eval HAVE_${2}=0
209 	return 1
210 }
211 
212 # --------
213 # compiler options
214 
215 COMP="${CC} ${CFLAGS} -Wno-unused -Werror"
216 
217 echo "selected CFLAGS=\"${CFLAGS}\"" 1>&2
218 echo "selected CFLAGS=\"${CFLAGS}\"" 1>&3
219 echo 1>&3
220 
221 if [ -n "${STATIC}" ]; then
222 	echo "selected STATIC=\"${STATIC}\" (manual)" 1>&2
223 	echo "selected STATIC=\"${STATIC}\" (manual)" 1>&3
224 	echo 1>&3
225 else
226 	runtest noop STATIC -static || true
227 	[ ${HAVE_STATIC} -eq 0 ] || STATIC="-static"
228 	echo "selected STATIC=\"${STATIC}\"" 1>&2
229 	echo "selected STATIC=\"${STATIC}\"" 1>&3
230 	echo 1>&3
231 fi
232 
233 # --------
234 # tests for config.h
235 
236 runtest err		ERR		|| true
237 runtest explicit_bzero	EXPLICIT_BZERO	|| true
238 runtest freezero	FREEZERO	|| true
239 runtest getdtablecount	GETDTABLECOUNT	|| true
240 runtest getdtablesize	GETDTABLESIZE	|| true
241 runtest getprogname	GETPROGNAME	|| true
242 runtest imsg		IMSG		-lutil || true
243 runtest landlock	LANDLOCK	|| true
244 runtest libevent	LIBEVENT	|| true
245 runtest libevent2	LIBEVENT2	|| true
246 runtest libtls		LIBTLS		|| true
247 runtest openssl		OPENSSL		|| true
248 runtest pr_set_name	PR_SET_NAME	|| true
249 runtest program_invocation_short_name PROGRAM_INVOCATION_SHORT_NAME "" -D_GNU_SOURCE || true
250 runtest queue_h		QUEUE_H		|| true
251 runtest reallocarray	REALLOCARRAY	|| true
252 runtest recallocarray	RECALLOCARRAY	|| true
253 runtest setproctitle	SETPROCTITLE	|| true
254 runtest strlcat		STRLCAT		|| true
255 runtest strlcpy		STRLCPY		|| true
256 runtest strtonum	STRTONUM	|| true
257 runtest tree_h		TREE_H		|| true
258 runtest vasprintf	VASPRINTF	"" -D_GNU_SOURCE || true
259 
260 if [ ${HAVE_LIBTLS} -eq 0 ]; then
261 	echo "FATAL: libtls not found" 1>&2
262 	echo "FATAL: libtls not found" 1>&3
263 	exit 1
264 fi
265 
266 if [ ${HAVE_OPENSSL} -eq 0 ]; then
267 	echo "FATAL: openssl not found" 1>&2
268 	echo "FATAL: openssl not found" 1>&3
269 	exit 1
270 fi
271 
272 if [ ${HAVE_LIBEVENT} -eq 0 ]; then
273 	echo "FATAL: libevent not found" 1>&2
274 	echo "FATAL: libevent not found" 1>&3
275 	exit 1
276 fi
277 
278 if [ ${HAVE_QUEUE_H} -eq 0 -o ${HAVE_IMSG} -eq 0 -o ${HAVE_TREE_H} -eq 0 ]; then
279 	CFLAGS="${CFLAGS} -I ${PWD}/compat"
280 fi
281 
282 # --------
283 # write config.h
284 
285 exec > config.h
286 
287 cat <<__HEREDOC__
288 #ifdef __cplusplus
289 #error "Do not use C++."
290 #endif
291 __HEREDOC__
292 
293 [ ${NEED_GNU_SOURCE} -eq 0 ] || echo "#define _GNU_SOURCE"
294 [ ${NEED_OPENBSD_SOURCE} -eq 0 ] || echo "#define _OPENBSD_SOURCE"
295 
296 [ ${HAVE_STRLCAT} -eq 0 -o ${HAVE_STRLCPY} -eq 0 -o ${HAVE_IMSG} -eq 0 ] \
297 	&& echo "#include <sys/types.h>"
298 [ ${HAVE_VASPRINTF} -eq 0 ] && echo "#include <stdarg.h>"
299 
300 if [ ${HAVE_QUEUE_H} -eq 1 ]; then
301 	echo "#include <sys/queue.h>"
302 else
303 	echo "#include <queue.h>"
304 fi
305 
306 if [ ${HAVE_TREE_H} -eq 1 ]; then
307 	echo "#include <sys/tree.h>"
308 else
309 	echo "#include <tree.h>"
310 fi
311 
312 echo "#include <sys/types.h>"
313 echo "#include <sys/uio.h>"
314 echo "#include <stdint.h>"
315 echo "#include <imsg.h>"
316 
317 cat <<__HEREDOC__
318 
319 #define VERSION			"${VERSION}"
320 #define DISABLE_SANDBOX		${DISABLE_SANDBOX}
321 
322 #define HAVE_ERR		${HAVE_ERR}
323 #define HAVE_EXPLICIT_BZERO	${HAVE_EXPLICIT_BZERO}
324 #define HAVE_FREEZERO		${HAVE_FREEZERO}
325 #define HAVE_GETDTABLECOUNT	${HAVE_GETDTABLECOUNT}
326 #define HAVE_GETDTABLESIZE	${HAVE_GETDTABLESIZE}
327 #define HAVE_GETPROGNAME	${HAVE_GETPROGNAME}
328 #define HAVE_IMSG		${HAVE_IMSG}
329 #define HAVE_LANDLOCK		${HAVE_LANDLOCK}
330 #define HAVE_LIBEVENT		${HAVE_LIBEVENT}
331 #define HAVE_LIBEVENT2		${HAVE_LIBEVENT2}
332 #define HAVE_PROGRAM_INVOCATION_SHORT_NAME ${HAVE_PROGRAM_INVOCATION_SHORT_NAME}
333 #define HAVE_PR_SET_NAME	${HAVE_PR_SET_NAME}
334 #define HAVE_QUEUE_H		${HAVE_QUEUE_H}
335 #define HAVE_REALLOCARRAY	${HAVE_REALLOCARRAY}
336 #define HAVE_RECALLOCARRAY	${HAVE_RECALLOCARRAY}
337 #define HAVE_SETPROCTITLE	${HAVE_SETPROCTITLE}
338 #define HAVE_STRLCAT		${HAVE_STRLCAT}
339 #define HAVE_STRLCPY		${HAVE_STRLCPY}
340 #define HAVE_STRTONUM		${HAVE_STRTONUM}
341 #define HAVE_TREE_H		${HAVE_TREE_H}
342 #define HAVE_VASPRINTF		${HAVE_VASPRINTF}
343 
344 __HEREDOC__
345 
346 [ ${HAVE_EXPLICIT_BZERO} -eq 0 -o \
347   ${HAVE_FREEZERO} -eq 0 -o \
348   ${HAVE_REALLOCARRAY} -eq 0 -o \
349   ${HAVE_RECALLOCARRAY} -eq 0 -o \
350   ${HAVE_STRLCAT} -eq 0 -o \
351   ${HAVE_STRLCPY} -eq 0 -o \
352   ${HAVE_STRTONUM} -eq 0 ] && echo "#include <stddef.h>"
353 
354 if [ ${HAVE_ERR} -eq 0 ]; then
355 	echo "extern	void	 err(int, const char*, ...);"
356 	echo "extern	void	 errx(int, const char*, ...);"
357 	echo "extern	void	 warn(const char*, ...);"
358 	echo "extern	void	 warnx(const char*, ...);"
359 	COMPAT="${COMPAT} compat/err.o"
360 else
361 	echo "#include <err.h>"
362 fi
363 if [ ${HAVE_EXPLICIT_BZERO} -eq 0 ]; then
364 	echo "extern	void	 explicit_bzero(void*, size_t);"
365 	COMPAT="${COMPAT} compat/explicit_bzero.o"
366 fi
367 if [ ${HAVE_FREEZERO} -eq 0 ]; then
368 	echo "extern	void	 freezero(void*, size_t);"
369 	COMPAT="${COMPAT} compat/freezero.o"
370 fi
371 if [ ${HAVE_GETDTABLECOUNT} -eq 0 ]; then
372 	echo "extern	int	 getdtablecount(void);"
373 	COMPAT="${COMPAT} compat/getdtablecount.o"
374 fi
375 if [ ${HAVE_GETDTABLESIZE} -eq 0 ]; then
376 	echo "extern	int	 getdtablesize(void);"
377 	COMPAT="${COMPAT} compat/getdtablesize.o"
378 fi
379 if [ ${HAVE_GETPROGNAME} -eq 0 ]; then
380 	echo "extern	const char *getprogname(void);"
381 	COMPAT="${COMPAT} compat/getprogname.o"
382 fi
383 if [ ${HAVE_IMSG} -eq 0 ]; then
384 	COMPAT="${COMPAT} compat/imsg.o compat/imsg-buffer.o"
385 fi
386 if [ ${HAVE_REALLOCARRAY} -eq 0 ]; then
387 	echo "extern	void	*reallocarray(void*, size_t, size_t);"
388 	COMPAT="${COMPAT} compat/reallocarray.o"
389 fi
390 if [ ${HAVE_RECALLOCARRAY} -eq 0 ]; then
391 	echo "extern	void	*recallocarray(void*, size_t, size_t, size_t);"
392 	COMPAT="${COMPAT} compat/recallocarray.o"
393 fi
394 if [ ${HAVE_SETPROCTITLE} -eq 0 ]; then
395 	echo "extern	void	 setproctitle(const char *fmt, ...);"
396 	COMPAT="${COMPAT} compat/setproctitle.o"
397 fi
398 if [ ${HAVE_STRLCAT} -eq 0 ]; then
399 	echo "extern	size_t	 strlcat(char*, const char*, size_t);"
400 	COMPAT="${COMPAT} compat/strlcat.o"
401 fi
402 if [ ${HAVE_STRLCPY} -eq 0 ]; then
403 	echo "extern	size_t	 strlcpy(char*, const char*, size_t);"
404 	COMPAT="${COMPAT} compat/strlcpy.o"
405 fi
406 if [ ${HAVE_STRTONUM} -eq 0 ]; then
407 	echo "extern	long long strtonum(const char*, long long, long long, const char**);"
408 	COMPAT="${COMPAT} compat/strtonum.o"
409 fi
410 if [ ${HAVE_VASPRINTF} -eq 0 ]; then
411 	echo "extern	int	 vasprintf(char**, const char*, va_list);"
412 	COMPAT="${COMPAT} compat/vasprintf.o"
413 fi
414 echo "file config.h: written" 1>&2
415 echo "file config.h: written" 1>&3
416 
417 # --------
418 # tests for Makefile.local
419 
420 exec > Makefile.local
421 
422 [ -z "${BINDIR}"          ] && BINDIR="${PREFIX}/bin"
423 [ -z "${MANDIR}"          ] && MANDIR="${PREFIX}/man"
424 
425 [ -z "${INSTALL_PROGRAM}" ] && INSTALL_PROGRAM="${INSTALL} -m 0555"
426 [ -z "${INSTALL_LIB}"     ] && INSTALL_LIB="${INSTALL} -m 0444"
427 [ -z "${INSTALL_MAN}"     ] && INSTALL_MAN="${INSTALL} -m 0444"
428 [ -z "${INSTALL_DATA}"    ] && INSTALL_DATA="${INSTALL} -m 0444"
429 
430 cat << __HEREDOC__
431 CC		= ${CC}
432 CFLAGS		= ${CFLAGS}
433 LDFLAGS		= ${LDFLAGS} ${LD_IMSG}
434 YACC		= ${YACC}
435 STATIC		= ${STATIC}
436 PREFIX		= ${PREFIX}
437 BINDIR		= ${BINDIR}
438 MANDIR		= ${MANDIR}
439 INCLUDEDIR	= ${INCLUDEDIR}
440 INSTALL		= ${INSTALL}
441 INSTALL_PROGRAM	= ${INSTALL_PROGRAM}
442 INSTALL_LIB	= ${INSTALL_LIB}
443 INSTALL_MAN	= ${INSTALL_MAN}
444 INSTALL_DATA	= ${INSTALL_DATA}
445 
446 VERSION		= ${VERSION}
447 
448 __HEREDOC__
449 
450 printf "COMPAT ="
451 for comp in ${COMPAT}; do
452 	printf " %s/%s" "$PWD" "$comp"
453 done
454 printf "\n"
455 
456 echo "file Makefile.local: written" 1>&2
457 echo "file Makefile.local: written" 1>&3
458 
459 exit 0