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