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