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