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