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