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