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 and CFLAGS
36 
37 CC=`printf "all:\\n\\t@echo \\\$(CC)\\n" | make ${MAKE_FLAGS} -sf -`
38 CFLAGS=`printf "all:\\n\\t@echo \\\$(CFLAGS)\\n" | make ${MAKE_FLAGS} -sf -`
39 CFLAGS="${CFLAGS} -g -W -Wall -Wextra -Wmissing-prototypes -Wstrict-prototypes"
40 CFLAGS="${CFLAGS} -Wwrite-strings -Wno-unused-parameter"
41 LDFLAGS="-ltls -levent"
42 LD_IMSG=
43 STATIC=
44 YACC=yacc
45 
46 DISABLE_SANDBOX=0
47 
48 NEED_GNU_SOURCE=0
49 NEED_OPENBSD_SOURCE=0
50 
51 PREFIX="/usr/local"
52 BINDIR=
53 
54 INSTALL="install"
55 
56 # try to auto detect CFLAGS and LDFLAGS
57 if which pkg-config 2>/dev/null 1>&2; then
58 	if pkg-config libtls; then
59 		CFLAGS="${CFLAGS} $(pkg-config --cflags libtls)"
60 		LDFLAGS="$(pkg-config --libs libtls)"
61 	fi
62 	if pkg-config openssl; then
63 		CFLAGS="${CFLAGS} $(pkg-config --cflags openssl)"
64 		LDFLAGS="${LDFLAGS} $(pkg-config --libs openssl)"
65 	fi
66 
67 	case "$(uname)" in
68 		OpenBSD)
69 			# use libevent in base
70 			;;
71 		*)
72 			if pkg-config libevent; then
73 				CFLAGS="${CFLAGS} $(pkg-config --cflags libevent)"
74 				LDFLAGS="${LDFLAGS} $(pkg-config --libs libevent)"
75 			fi
76 			;;
77 	esac
78 fi
79 
80 # auto detect yacc/bison
81 which ${YACC} 2>/dev/null 1>&2 || {
82 	echo "${YACC} not found: trying bison" 1>&2
83 	echo "${YACC} not found: trying bison" 1>&3
84 	YACC=bison
85 	which ${YACC} 2>/dev/null 1>&2 || {
86 		echo "${YACC} not found: giving up" 1>&2
87 		echo "${YACC} not found: giving up" 1>&3
88 	}
89 }
90 
91 # --------
92 # allow certain variables to be overridden on the command line
93 
94 for keyvals in "$@"; do
95 	if [ "$keyvals" = "--disable-sandbox" ]; then
96 		DISABLE_SANDBOX=1
97 		continue
98 	fi
99 
100 	key=`echo $keyvals | cut -s -d '=' -f1`
101 	if [ -z "$key" ]; then
102 		echo "$0: invalid key-value: $keyvals" 1>&2
103 		exit 1
104 	fi
105 	val=`echo $keyvals | cut -d '=' -f 2-`
106 	case "$key" in
107 		BINDIR)  BINDIR="$val" ;;
108 		CC)      CC="$val" ;;
109 		CFLAGS)  CFLAGS="$val" ;;
110 		DESTDIR) DESTDIR="$val" ;;
111 		LDFLAGS) LDFLAGS="$val" ;;
112 		PREFIX)  PREFIX="$val" ;;
113 		YACC)    YACC="$val" ;;
114 		*)
115 			echo "$0: invalid key: $key" 1>&2
116 			exit 1
117 	esac
118 done
119 
120 # --------
121 # tests functions
122 
123 # Check whether this HAVE_ setting is manually overridden.
124 # If yes, use the override, if no, do not decide anything yet.
125 # Arguments: test file name, test var name, manual value
126 ismanual() {
127 	[ -z "${3}" ] && return 1
128 	echo "tested ${1}: HAVE_${2}=${3} (manual)" 1>&2
129 	echo "tested ${1}: HAVE_${2}=${3} (manual)" 1>&3
130 	echo 1>&3
131 	return 0
132 }
133 
134 # Run a single autoconfiguration test.
135 # In case of success, enable the feature.
136 # In case of failure, do not decide anything yet.
137 # Arguments: test file name, test var name, additional CFLAGS
138 singletest() {
139 	n=${1}${3}
140 	cat 1>&3 << __HEREDOC__
141 testing ${n} ...
142 ${COMP} -o have/${1} have/${1}.c ${3} ${LDFLAGS}
143 __HEREDOC__
144 
145 	if ${COMP} -o "have/${1}" "have/${1}.c" ${3} ${LDFLAGS} 1>&3 2>&3
146 	then
147 		echo "partial result of ${n}: ${CC} succeeded" 1>&3
148 	else
149 		echo "tested ${n}: no (compilation failed)" 1>&2
150 		echo "result of ${n}: ${CC} failed with exit status $?" 1>&3
151 		echo "result of compiling ${n}: no" 1>&3
152 		echo 1>&3
153 		return 1
154 	fi
155 
156 	if ./have/${1} 1>&3 2>&3; then
157 		echo "tested ${n}: yes" 1>&2
158 		echo "result of running ${n}: yes" 1>&3
159 		echo 1>&3
160 		eval HAVE_${2}=1
161 		[ "${3}" = "-D_GNU_SOURCE" ] && NEED_GNU_SOURCE=1
162 		[ "${3}" = "-D_OPENBSD_SOURCE" ] && NEED_OPENBSD_SOURCE=1
163 		[ "${3}" = "-lutil" ] && LD_IMSG="-lutil"
164 		rm "have/${1}"
165 		return 0
166 	else
167 		echo "tested ${n}: no (execution failed)" 1>&2
168 		echo "result of ${n}: execution failed with exit status $?" 1>&3
169 		echo "result of running ${n}: no" 1>&3
170 		echo 1>&3
171 		rm "have/${1}"
172 		return 1
173 	fi
174 }
175 
176 # Run a complete autoconfiguration test, including the check for
177 # a manual override and disabling the feature on failure.
178 # Arguments: test file name, test var name, additional CFLAGS
179 # The final argument can optionally be repeated a second time.
180 runtest() {
181 	eval _manual=\${HAVE_${2}}
182 	ismanual "${1}" "${2}" "${_manual}" && return 0
183 	singletest "${1}" "${2}" "${3}" && return 0
184 	[ -n "${4}" ] && singletest "${1}" "${2}" "${4}" && return 0
185 	eval HAVE_${2}=0
186 	return 1
187 }
188 
189 # --------
190 # compiler options
191 
192 COMP="${CC} ${CFLAGS} -Wno-unused -Werror"
193 
194 echo "selected CFLAGS=\"${CFLAGS}\"" 1>&2
195 echo "selected CFLAGS=\"${CFLAGS}\"" 1>&3
196 echo 1>&3
197 
198 if [ -n "${STATIC}" ]; then
199 	echo "selected STATIC=\"${STATIC}\" (manual)" 1>&2
200 	echo "selected STATIC=\"${STATIC}\" (manual)" 1>&3
201 	echo 1>&3
202 else
203 	runtest noop STATIC -static || true
204 	[ ${HAVE_STATIC} -eq 0 ] || STATIC="-static"
205 	echo "selected STATIC=\"${STATIC}\"" 1>&2
206 	echo "selected STATIC=\"${STATIC}\"" 1>&3
207 	echo 1>&3
208 fi
209 
210 # --------
211 # tests for config.h
212 
213 runtest err		ERR		|| true
214 runtest explicit_bzero	EXPLICIT_BZERO	|| true
215 runtest freezero	FREEZERO	|| true
216 runtest getdtablesize	GETDTABLESIZE	|| true
217 runtest getdtablecount	GETDTABLECOUNT	|| true
218 runtest getprogname	GETPROGNAME	|| true
219 runtest imsg		IMSG		-lutil || true
220 runtest libevent	LIBEVENT	|| true
221 runtest libtls		LIBTLS		|| true
222 runtest openssl		OPENSSL		|| true
223 runtest pr_set_name	PR_SET_NAME	|| true
224 runtest program_invocation_short_name PROGRAM_INVOCATION_SHORT_NAME "" -D_GNU_SOURCE || true
225 runtest queue_h		QUEUE_H		|| true
226 runtest reallocarray	REALLOCARRAY	|| true
227 runtest recallocarray	RECALLOCARRAY	|| true
228 runtest setproctitle	SETPROCTITLE	|| true
229 runtest strlcat		STRLCAT		|| true
230 runtest strlcpy		STRLCPY		|| true
231 runtest strtonum	STRTONUM	|| true
232 runtest vasprintf	VASPRINTF	"" -D_GNU_SOURCE || true
233 
234 if [ ${HAVE_LIBTLS} -eq 0 ]; then
235 	echo "FATAL: libtls not found" 1>&2
236 	echo "FATAL: libtls not found" 1>&3
237 	exit 1
238 fi
239 
240 if [ ${HAVE_OPENSSL} -eq 0 ]; then
241 	echo "FATAL: openssl not found" 1>&2
242 	echo "FATAL: openssl not found" 1>&3
243 	exit 1
244 fi
245 
246 if [ ${HAVE_LIBEVENT} -eq 0 ]; then
247 	echo "FATAL: libevent not found" 1>&2
248 	echo "FATAL: libevent not found" 1>&3
249 	exit 1
250 fi
251 
252 if [ ${HAVE_QUEUE_H} -eq 0 -o ${HAVE_IMSG} -eq 0 ]; then
253 	CFLAGS="${CFLAGS} -I ${PWD}/compat"
254 fi
255 
256 # --------
257 # write config.h
258 
259 exec > config.h
260 
261 cat <<__HEREDOC__
262 #ifdef __cplusplus
263 #error "Do not use C++."
264 #endif
265 __HEREDOC__
266 
267 [ ${NEED_GNU_SOURCE} -eq 0 ] || echo "#define _GNU_SOURCE"
268 [ ${NEED_OPENBSD_SOURCE} -eq 0 ] || echo "#define _OPENBSD_SOURCE"
269 
270 [ ${HAVE_STRLCAT} -eq 0 -o ${HAVE_STRLCPY} -eq 0 -o ${HAVE_IMSG} -eq 0 ] \
271 	&& echo "#include <sys/types.h>"
272 [ ${HAVE_VASPRINTF} -eq 0 ] && echo "#include <stdarg.h>"
273 
274 if [ ${HAVE_QUEUE_H} -eq 1 ]; then
275 	echo "#include <sys/queue.h>"
276 else
277 	echo "#include <queue.h>"
278 fi
279 
280 echo "#include <sys/types.h>"
281 echo "#include <sys/uio.h>"
282 echo "#include <stdint.h>"
283 echo "#include <imsg.h>"
284 
285 cat <<__HEREDOC__
286 
287 #define DISABLE_SANDBOX		${DISABLE_SANDBOX}
288 
289 #define HAVE_ERR		${HAVE_ERR}
290 #define HAVE_EXPLICIT_BZERO	${HAVE_EXPLICIT_BZERO}
291 #define HAVE_FREEZERO		${HAVE_FREEZERO}
292 #define HAVE_GETDTABLECOUNT	${HAVE_GETDTABLECOUNT}
293 #define HAVE_GETDTABLESIZE	${HAVE_GETDTABLESIZE}
294 #define HAVE_GETPROGNAME	${HAVE_GETPROGNAME}
295 #define HAVE_IMSG		${HAVE_IMSG}
296 #define HAVE_LIBEVENT		${HAVE_LIBEVENT}
297 #define HAVE_PROGRAM_INVOCATION_SHORT_NAME ${HAVE_PROGRAM_INVOCATION_SHORT_NAME}
298 #define HAVE_PR_SET_NAME	${HAVE_PR_SET_NAME}
299 #define HAVE_QUEUE_H		${HAVE_QUEUE_H}
300 #define HAVE_REALLOCARRAY	${HAVE_REALLOCARRAY}
301 #define HAVE_RECALLOCARRAY	${HAVE_RECALLOCARRAY}
302 #define HAVE_SETPROCTITLE	${HAVE_SETPROCTITLE}
303 #define HAVE_STRLCAT		${HAVE_STRLCAT}
304 #define HAVE_STRLCPY		${HAVE_STRLCPY}
305 #define HAVE_STRTONUM		${HAVE_STRTONUM}
306 #define HAVE_VASPRINTF		${HAVE_VASPRINTF}
307 
308 __HEREDOC__
309 
310 [ ${HAVE_EXPLICIT_BZERO} -eq 0 -o \
311   ${HAVE_FREEZERO} -eq 0 -o \
312   ${HAVE_REALLOCARRAY} -eq 0 -o \
313   ${HAVE_RECALLOCARRAY} -eq 0 -o \
314   ${HAVE_STRLCAT} -eq 0 -o \
315   ${HAVE_STRLCPY} -eq 0 -o \
316   ${HAVE_STRTONUM} -eq 0 ] && echo "#include <stddef.h>"
317 
318 if [ ${HAVE_ERR} -eq 0 ]; then
319 	echo "extern	void	 err(int, const char*, ...);"
320 	echo "extern	void	 errx(int, const char*, ...);"
321 	echo "extern	void	 warn(const char*, ...);"
322 	echo "extern	void	 warnx(const char*, ...);"
323 	COMPAT="${COMPAT} compat/err.o"
324 else
325 	echo "#include <err.h>"
326 fi
327 if [ ${HAVE_EXPLICIT_BZERO} -eq 0 ]; then
328 	echo "extern	void	 explicit_bzero(void*, size_t);"
329 	COMPAT="${COMPAT} compat/explicit_bzero.o"
330 fi
331 if [ ${HAVE_FREEZERO} -eq 0 ]; then
332 	echo "extern	void	 freezero(void*, size_t);"
333 	COMPAT="${COMPAT} compat/freezero.o"
334 fi
335 if [ ${HAVE_GETDTABLECOUNT} -eq 0 ]; then
336 	echo "extern	int	 getdtablecount(void);"
337 	COMPAT="${COMPAT} compat/getdtablecount.o"
338 fi
339 if [ ${HAVE_GETDTABLESIZE} -eq 0 ]; then
340 	echo "extern	int	 getdtablesize(void);"
341 	COMPAT="${COMPAT} compat/getdtablesize.o"
342 fi
343 if [ ${HAVE_GETPROGNAME} -eq 0 ]; then
344 	echo "extern	const char *getprogname(void);"
345 	COMPAT="${COMPAT} compat/getprogname.o"
346 fi
347 if [ ${HAVE_IMSG} -eq 0 ]; then
348 	COMPAT="${COMPAT} compat/imsg.o compat/imsg-buffer.o"
349 fi
350 if [ ${HAVE_REALLOCARRAY} -eq 0 ]; then
351 	echo "extern	void	*reallocarray(void*, size_t, size_t);"
352 	COMPAT="${COMPAT} compat/reallocarray.o"
353 fi
354 if [ ${HAVE_RECALLOCARRAY} -eq 0 ]; then
355 	echo "extern	void	*recallocarray(void*, size_t, size_t, size_t);"
356 	COMPAT="${COMPAT} compat/recallocarray.o"
357 fi
358 if [ ${HAVE_SETPROCTITLE} -eq 0 ]; then
359 	echo "extern	void	 setproctitle(const char *fmt, ...);"
360 	COMPAT="${COMPAT} compat/setproctitle.o"
361 fi
362 if [ ${HAVE_STRLCAT} -eq 0 ]; then
363 	echo "extern	size_t	 strlcat(char*, const char*, size_t);"
364 	COMPAT="${COMPAT} compat/strlcat.o"
365 fi
366 if [ ${HAVE_STRLCPY} -eq 0 ]; then
367 	echo "extern	size_t	 strlcpy(char*, const char*, size_t);"
368 	COMPAT="${COMPAT} compat/strlcpy.o"
369 fi
370 if [ ${HAVE_STRTONUM} -eq 0 ]; then
371 	echo "extern	long long strtonum(const char*, long long, long long, const char**);"
372 	COMPAT="${COMPAT} compat/strtonum.o"
373 fi
374 if [ ${HAVE_VASPRINTF} -eq 0 ]; then
375 	echo "extern	int	 vasprintf(char**, const char*, va_list);"
376 	COMPAT="${COMPAT} compat/vasprintf.o"
377 fi
378 echo "file config.h: written" 1>&2
379 echo "file config.h: written" 1>&3
380 
381 # --------
382 # tests for Makefile.local
383 
384 exec > Makefile.local
385 
386 [ -z "${BINDIR}"          ] && BINDIR="${PREFIX}/bin"
387 [ -z "${MANDIR}"          ] && MANDIR="${PREFIX}/man"
388 
389 [ -z "${INSTALL_PROGRAM}" ] && INSTALL_PROGRAM="${INSTALL} -m 0555"
390 [ -z "${INSTALL_LIB}"     ] && INSTALL_LIB="${INSTALL} -m 0444"
391 [ -z "${INSTALL_MAN}"     ] && INSTALL_MAN="${INSTALL} -m 0444"
392 [ -z "${INSTALL_DATA}"    ] && INSTALL_DATA="${INSTALL} -m 0444"
393 
394 cat << __HEREDOC__
395 CC		= ${CC}
396 CFLAGS		= ${CFLAGS}
397 LDFLAGS		= ${LDFLAGS} ${LD_IMSG}
398 YACC		= ${YACC}
399 STATIC		= ${STATIC}
400 PREFIX		= ${PREFIX}
401 BINDIR		= ${BINDIR}
402 MANDIR		= ${MANDIR}
403 INCLUDEDIR	= ${INCLUDEDIR}
404 INSTALL		= ${INSTALL}
405 INSTALL_PROGRAM	= ${INSTALL_PROGRAM}
406 INSTALL_LIB	= ${INSTALL_LIB}
407 INSTALL_MAN	= ${INSTALL_MAN}
408 INSTALL_DATA	= ${INSTALL_DATA}
409 
410 __HEREDOC__
411 
412 printf "COMPAT ="
413 for comp in ${COMPAT}; do
414 	printf " %s/%s" "$PWD" "$comp"
415 done
416 printf "\n"
417 
418 echo "file Makefile.local: written" 1>&2
419 echo "file Makefile.local: written" 1>&3
420 
421 exit 0