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=1.8-dev
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="$val" ;;
137 		--prefix) PREFIX="$val" ;;
138 		*)
139 			echo "$0: invalid key: $key" 1>&2
140 			exit 1
141 	esac
142 done
143 
144 # --------
145 # tests functions
146 
147 # Check whether this HAVE_ setting is manually overridden.
148 # If yes, use the override, if no, do not decide anything yet.
149 # Arguments: test file name, test var name, manual value
150 ismanual() {
151 	[ -z "${3}" ] && return 1
152 	echo "tested ${1}: HAVE_${2}=${3} (manual)" 1>&2
153 	echo "tested ${1}: HAVE_${2}=${3} (manual)" 1>&3
154 	echo 1>&3
155 	return 0
156 }
157 
158 # Run a single autoconfiguration test.
159 # In case of success, enable the feature.
160 # In case of failure, do not decide anything yet.
161 # Arguments: test file name, test var name, additional CFLAGS
162 singletest() {
163 	n=${1}${3}
164 	cat 1>&3 << __HEREDOC__
165 testing ${n} ...
166 ${COMP} -o have/${1} have/${1}.c ${3} ${LDFLAGS}
167 __HEREDOC__
168 
169 	if ${COMP} -o "have/${1}" "have/${1}.c" ${3} ${LDFLAGS} 1>&3 2>&3
170 	then
171 		echo "tested ${n}: yes" 1>&2
172 		echo "tested ${n}: yes" 1>&3
173 		echo 1>&3
174 		eval HAVE_${2}=1
175 		[ "${3}" = "-D_GNU_SOURCE" ] && NEED_GNU_SOURCE=1
176 		[ "${3}" = "-D_OPENBSD_SOURCE" ] && NEED_OPENBSD_SOURCE=1
177 		[ "${3}" = "-lutil" ] && LD_IMSG="-lutil"
178 		rm "have/${1}"
179 		return 0
180 	else
181 		echo "tested ${n}: no (compilation failed)" 1>&2
182 		echo "result of ${n}: ${CC} failed with exit status $?" 1>&3
183 		echo "result of compiling ${n}: no" 1>&3
184 		echo 1>&3
185 		return 1
186 	fi
187 }
188 
189 # Run a complete autoconfiguration test, including the check for
190 # a manual override and disabling the feature on failure.
191 # Arguments: test file name, test var name, additional CFLAGS
192 # The final argument can optionally be repeated a second time.
193 runtest() {
194 	eval _manual=\${HAVE_${2}}
195 	ismanual "${1}" "${2}" "${_manual}" && return 0
196 	singletest "${1}" "${2}" "${3}" && return 0
197 	[ -n "${4}" ] && singletest "${1}" "${2}" "${4}" && return 0
198 	eval HAVE_${2}=0
199 	return 1
200 }
201 
202 # --------
203 # compiler options
204 
205 COMP="${CC} ${CFLAGS} -Wno-unused -Werror"
206 
207 echo "selected CFLAGS=\"${CFLAGS}\"" 1>&2
208 echo "selected CFLAGS=\"${CFLAGS}\"" 1>&3
209 echo 1>&3
210 
211 if [ -n "${STATIC}" ]; then
212 	echo "selected STATIC=\"${STATIC}\" (manual)" 1>&2
213 	echo "selected STATIC=\"${STATIC}\" (manual)" 1>&3
214 	echo 1>&3
215 else
216 	runtest noop STATIC -static || true
217 	[ ${HAVE_STATIC} -eq 0 ] || STATIC="-static"
218 	echo "selected STATIC=\"${STATIC}\"" 1>&2
219 	echo "selected STATIC=\"${STATIC}\"" 1>&3
220 	echo 1>&3
221 fi
222 
223 # --------
224 # tests for config.h
225 
226 runtest err		ERR		|| true
227 runtest explicit_bzero	EXPLICIT_BZERO	|| true
228 runtest freezero	FREEZERO	|| true
229 runtest getdtablecount	GETDTABLECOUNT	|| true
230 runtest getdtablesize	GETDTABLESIZE	|| true
231 runtest getprogname	GETPROGNAME	|| true
232 runtest imsg		IMSG		-lutil || true
233 runtest landlock	LANDLOCK	|| true
234 runtest libevent	LIBEVENT	|| true
235 runtest libevent2	LIBEVENT2	|| true
236 runtest libtls		LIBTLS		|| true
237 runtest openssl		OPENSSL		|| true
238 runtest pr_set_name	PR_SET_NAME	|| true
239 runtest program_invocation_short_name PROGRAM_INVOCATION_SHORT_NAME "" -D_GNU_SOURCE || true
240 runtest queue_h		QUEUE_H		|| true
241 runtest reallocarray	REALLOCARRAY	|| true
242 runtest recallocarray	RECALLOCARRAY	|| true
243 runtest setproctitle	SETPROCTITLE	|| true
244 runtest strlcat		STRLCAT		|| true
245 runtest strlcpy		STRLCPY		|| true
246 runtest strtonum	STRTONUM	|| true
247 runtest tree_h		TREE_H		|| true
248 runtest vasprintf	VASPRINTF	"" -D_GNU_SOURCE || true
249 
250 if [ ${HAVE_LIBTLS} -eq 0 ]; then
251 	echo "FATAL: libtls not found" 1>&2
252 	echo "FATAL: libtls not found" 1>&3
253 	exit 1
254 fi
255 
256 if [ ${HAVE_OPENSSL} -eq 0 ]; then
257 	echo "FATAL: openssl not found" 1>&2
258 	echo "FATAL: openssl not found" 1>&3
259 	exit 1
260 fi
261 
262 if [ ${HAVE_LIBEVENT} -eq 0 ]; then
263 	echo "FATAL: libevent not found" 1>&2
264 	echo "FATAL: libevent not found" 1>&3
265 	exit 1
266 fi
267 
268 if [ ${HAVE_QUEUE_H} -eq 0 -o ${HAVE_IMSG} -eq 0 -o ${HAVE_TREE_H} -eq 0 ]; then
269 	CFLAGS="${CFLAGS} -I ${PWD}/compat"
270 fi
271 
272 # --------
273 # write config.h
274 
275 exec > config.h
276 
277 cat <<__HEREDOC__
278 #ifdef __cplusplus
279 #error "Do not use C++."
280 #endif
281 __HEREDOC__
282 
283 [ ${NEED_GNU_SOURCE} -eq 0 ] || echo "#define _GNU_SOURCE"
284 [ ${NEED_OPENBSD_SOURCE} -eq 0 ] || echo "#define _OPENBSD_SOURCE"
285 
286 [ ${HAVE_STRLCAT} -eq 0 -o ${HAVE_STRLCPY} -eq 0 -o ${HAVE_IMSG} -eq 0 ] \
287 	&& echo "#include <sys/types.h>"
288 [ ${HAVE_VASPRINTF} -eq 0 ] && echo "#include <stdarg.h>"
289 
290 if [ ${HAVE_QUEUE_H} -eq 1 ]; then
291 	echo "#include <sys/queue.h>"
292 else
293 	echo "#include <queue.h>"
294 fi
295 
296 if [ ${HAVE_TREE_H} -eq 1 ]; then
297 	echo "#include <sys/tree.h>"
298 else
299 	echo "#include <tree.h>"
300 fi
301 
302 echo "#include <sys/types.h>"
303 echo "#include <sys/uio.h>"
304 echo "#include <stdint.h>"
305 echo "#include <imsg.h>"
306 
307 cat <<__HEREDOC__
308 
309 #define VERSION			"${VERSION}"
310 #define DISABLE_SANDBOX		${DISABLE_SANDBOX}
311 
312 #define HAVE_ERR		${HAVE_ERR}
313 #define HAVE_EXPLICIT_BZERO	${HAVE_EXPLICIT_BZERO}
314 #define HAVE_FREEZERO		${HAVE_FREEZERO}
315 #define HAVE_GETDTABLECOUNT	${HAVE_GETDTABLECOUNT}
316 #define HAVE_GETDTABLESIZE	${HAVE_GETDTABLESIZE}
317 #define HAVE_GETPROGNAME	${HAVE_GETPROGNAME}
318 #define HAVE_IMSG		${HAVE_IMSG}
319 #define HAVE_LANDLOCK		${HAVE_LANDLOCK}
320 #define HAVE_LIBEVENT		${HAVE_LIBEVENT}
321 #define HAVE_LIBEVENT2		${HAVE_LIBEVENT2}
322 #define HAVE_PROGRAM_INVOCATION_SHORT_NAME ${HAVE_PROGRAM_INVOCATION_SHORT_NAME}
323 #define HAVE_PR_SET_NAME	${HAVE_PR_SET_NAME}
324 #define HAVE_QUEUE_H		${HAVE_QUEUE_H}
325 #define HAVE_REALLOCARRAY	${HAVE_REALLOCARRAY}
326 #define HAVE_RECALLOCARRAY	${HAVE_RECALLOCARRAY}
327 #define HAVE_SETPROCTITLE	${HAVE_SETPROCTITLE}
328 #define HAVE_STRLCAT		${HAVE_STRLCAT}
329 #define HAVE_STRLCPY		${HAVE_STRLCPY}
330 #define HAVE_STRTONUM		${HAVE_STRTONUM}
331 #define HAVE_TREE_H		${HAVE_TREE_H}
332 #define HAVE_VASPRINTF		${HAVE_VASPRINTF}
333 
334 __HEREDOC__
335 
336 [ ${HAVE_EXPLICIT_BZERO} -eq 0 -o \
337   ${HAVE_FREEZERO} -eq 0 -o \
338   ${HAVE_REALLOCARRAY} -eq 0 -o \
339   ${HAVE_RECALLOCARRAY} -eq 0 -o \
340   ${HAVE_STRLCAT} -eq 0 -o \
341   ${HAVE_STRLCPY} -eq 0 -o \
342   ${HAVE_STRTONUM} -eq 0 ] && echo "#include <stddef.h>"
343 
344 if [ ${HAVE_ERR} -eq 0 ]; then
345 	echo "extern	void	 err(int, const char*, ...);"
346 	echo "extern	void	 errx(int, const char*, ...);"
347 	echo "extern	void	 warn(const char*, ...);"
348 	echo "extern	void	 warnx(const char*, ...);"
349 	COMPAT="${COMPAT} compat/err.o"
350 else
351 	echo "#include <err.h>"
352 fi
353 if [ ${HAVE_EXPLICIT_BZERO} -eq 0 ]; then
354 	echo "extern	void	 explicit_bzero(void*, size_t);"
355 	COMPAT="${COMPAT} compat/explicit_bzero.o"
356 fi
357 if [ ${HAVE_FREEZERO} -eq 0 ]; then
358 	echo "extern	void	 freezero(void*, size_t);"
359 	COMPAT="${COMPAT} compat/freezero.o"
360 fi
361 if [ ${HAVE_GETDTABLECOUNT} -eq 0 ]; then
362 	echo "extern	int	 getdtablecount(void);"
363 	COMPAT="${COMPAT} compat/getdtablecount.o"
364 fi
365 if [ ${HAVE_GETDTABLESIZE} -eq 0 ]; then
366 	echo "extern	int	 getdtablesize(void);"
367 	COMPAT="${COMPAT} compat/getdtablesize.o"
368 fi
369 if [ ${HAVE_GETPROGNAME} -eq 0 ]; then
370 	echo "extern	const char *getprogname(void);"
371 	COMPAT="${COMPAT} compat/getprogname.o"
372 fi
373 if [ ${HAVE_IMSG} -eq 0 ]; then
374 	COMPAT="${COMPAT} compat/imsg.o compat/imsg-buffer.o"
375 fi
376 if [ ${HAVE_REALLOCARRAY} -eq 0 ]; then
377 	echo "extern	void	*reallocarray(void*, size_t, size_t);"
378 	COMPAT="${COMPAT} compat/reallocarray.o"
379 fi
380 if [ ${HAVE_RECALLOCARRAY} -eq 0 ]; then
381 	echo "extern	void	*recallocarray(void*, size_t, size_t, size_t);"
382 	COMPAT="${COMPAT} compat/recallocarray.o"
383 fi
384 if [ ${HAVE_SETPROCTITLE} -eq 0 ]; then
385 	echo "extern	void	 setproctitle(const char *fmt, ...);"
386 	COMPAT="${COMPAT} compat/setproctitle.o"
387 fi
388 if [ ${HAVE_STRLCAT} -eq 0 ]; then
389 	echo "extern	size_t	 strlcat(char*, const char*, size_t);"
390 	COMPAT="${COMPAT} compat/strlcat.o"
391 fi
392 if [ ${HAVE_STRLCPY} -eq 0 ]; then
393 	echo "extern	size_t	 strlcpy(char*, const char*, size_t);"
394 	COMPAT="${COMPAT} compat/strlcpy.o"
395 fi
396 if [ ${HAVE_STRTONUM} -eq 0 ]; then
397 	echo "extern	long long strtonum(const char*, long long, long long, const char**);"
398 	COMPAT="${COMPAT} compat/strtonum.o"
399 fi
400 if [ ${HAVE_VASPRINTF} -eq 0 ]; then
401 	echo "extern	int	 vasprintf(char**, const char*, va_list);"
402 	COMPAT="${COMPAT} compat/vasprintf.o"
403 fi
404 echo "file config.h: written" 1>&2
405 echo "file config.h: written" 1>&3
406 
407 # --------
408 # tests for Makefile.local
409 
410 exec > Makefile.local
411 
412 [ -z "${BINDIR}"          ] && BINDIR="${PREFIX}/bin"
413 [ -z "${MANDIR}"          ] && MANDIR="${PREFIX}/man"
414 
415 [ -z "${INSTALL_PROGRAM}" ] && INSTALL_PROGRAM="${INSTALL} -m 0555"
416 [ -z "${INSTALL_LIB}"     ] && INSTALL_LIB="${INSTALL} -m 0444"
417 [ -z "${INSTALL_MAN}"     ] && INSTALL_MAN="${INSTALL} -m 0444"
418 [ -z "${INSTALL_DATA}"    ] && INSTALL_DATA="${INSTALL} -m 0444"
419 
420 cat << __HEREDOC__
421 CC		= ${CC}
422 CFLAGS		= ${CFLAGS}
423 LDFLAGS		= ${LDFLAGS} ${LD_IMSG}
424 YACC		= ${YACC}
425 STATIC		= ${STATIC}
426 PREFIX		= ${PREFIX}
427 BINDIR		= ${BINDIR}
428 MANDIR		= ${MANDIR}
429 INCLUDEDIR	= ${INCLUDEDIR}
430 INSTALL		= ${INSTALL}
431 INSTALL_PROGRAM	= ${INSTALL_PROGRAM}
432 INSTALL_LIB	= ${INSTALL_LIB}
433 INSTALL_MAN	= ${INSTALL_MAN}
434 INSTALL_DATA	= ${INSTALL_DATA}
435 
436 VERSION		= ${VERSION}
437 
438 __HEREDOC__
439 
440 printf "COMPAT ="
441 for comp in ${COMPAT}; do
442 	printf " %s/%s" "$PWD" "$comp"
443 done
444 printf "\n"
445 
446 echo "file Makefile.local: written" 1>&2
447 echo "file Makefile.local: written" 1>&3
448 
449 exit 0