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