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