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Date:: Tue Jun 13 16:36:10 2023 UTC
Message:: rework the configure script now it resembles less oconfigure and more the configure scripts I'm using in my recent projects. I'd argue it's more easy to use it.
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1 #!/bin/sh
2 #
3 # Copyright (c) 2021, 2022, 2023 Omar Polo <op@omarpolo.com>
4 # Copyright (c) 2011, 2013-2022 Ingo Schwarze <schwarze@openbsd.org>
5 # Copyright (c) 2010, 2011, 2012 Kristaps Dzonsons <kristaps@bsd.lv>
6 #
7 # Permission to use, copy, modify, and distribute this software for any
8 # purpose with or without fee is hereby granted, provided that the above
9 # copyright notice and this permission notice appear in all copies.
10 #
11 # THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
12 # WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13 # MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14 # ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15 # WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16 # ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17 # OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 
19 set -e
20 
21 RELEASE=no
22 VERSION=2.0-unstable
23 
24 usage()
25 {
26 	echo "usage: $0 [--help] [--prefix=prefix] [OPTION=VALUE...]" >&2
27 	exit 1
28 }
29 
30 if command -v yacc 2>/dev/null >&2; then
31 	YACC=yacc
32 elif command -v bison 2>/dev/null >&2; then
33 	YACC=bison
34 else
35 	# assume yacc by default.  Make will fail building parse.y if
36 	# not from a release tarball, but at least it'll have a decent
37 	# error message.
38 	YACC=yacc
39 fi
40 
41 pkgconfig=
42 
43 CC=${CC:-cc}
44 
45 if [ "$RELEASE" = no ]; then
46 	CFLAGS=${CFLAGS:--O0 -g3}
47 else
48 	CFLAGS=${CFLAGS:--O2 -pipe}
49 fi
50 
51 PREFIX=${PREFIX-/usr/local}
52 
53 CDIAGFLAGS=
54 CDIAGFLAGS="${CDIAGFLAGS} -W -Wall -Wextra -Wpointer-arith -Wuninitialized"
55 CDIAGFLAGS="${CDIAGFLAGS} -Wstrict-prototypes -Wmissing-prototypes -Wunused"
56 CDIAGFLAGS="${CDIAGFLAGS} -Wsign-compare -Wno-unused-parameter" # -Wshadow
57 CDIAGFLAGS="${CDIAGFLAGS} -Wno-missing-field-initializers"
58 CDIAGFLAGS="${CDIAGFLAGS} -Wpointer-sign"
59 
60 while [ $# -gt 0 ]; do
61 	key="${1%%=*}"
62 	val="${1#*=}"
63 
64 	if [ "$key" = --help ]; then
65 		usage
66 	fi
67 
68 	if [ "$key" = -Werror ]; then
69 		CDIAGFLAGS="$CDIAGFLAGS -Werror"
70 		shift
71 		continue
72 	fi
73 
74 	if [ "$key" = --enable-sandbox ]; then
75 		key=DISABLE_SANDBOX
76 		val=0
77 	fi
78 
79 	if [ "$key" = --disable-sandbox ]; then
80 		key=DISABLE_SANDBOX
81 		val=1
82 	fi
83 
84 	if [ "$key" = "$1" ]; then
85 		# if no --xy=, look at the next arg
86 		if ! shift 2>/dev/null; then
87 			echo "$0: missing value for $key" >&2
88 			exit 1
89 		fi
90 		val="$1"
91 	fi
92 
93 	case "$key" in
94 	--bindir)	key=BINDIR ;;
95 	--mandir)	key=MANDIR ;;
96 	--prefix)	key=PREFIX ;;
97 	esac
98 
99 	case "$key" in
100 	BINDIR)		BINDIR="$val" ;;
101 	CC)		CC="$val" ;;
102 	CFLAGS)		CFLAGS="$val" ;;
103 	CDIAGFLAGS)	CDIAGFLAGS="$val" ;;
104 	DISABLE_SANDBOX) DISABLE_SANDBOX="$val" ;;
105 	LDFLAGS)	LDFLAGS="$val" ;;
106 	PKG_CONFIG)	PKG_CONFIG="$val" ;;
107 	PREFIX)		PREFIX="$val" ;;
108 	YACC)		YACC="$val" ;;
109 	*)		usage
110 	esac
111 
112 	shift
113 done
114 
115 [ -w config.log ] && mv config.log config.log.old
116 [ -w config.h   ] && mv config.h   config.h.old
117 
118 exec 3> config.log
119 echo "file config.log: writing..."
120 
121 NEED_GNU_SOURCE=0
122 NEED_OPENBSD_SOURCE=0
123 
124 COMPATS=
125 COMP="${CC} ${CFLAGS} -Wno-unused -Werror"
126 
127 # singletest name var extra-cflags extra-libs msg
128 singletest() {
129 	msg="$5"
130 	if [ -z "$msg" ]; then
131 		if [ -n "$3" ]; then
132 			msg=" ($3)"
133 		elif [ -n "$4" ]; then
134 			msg=" ($4)"
135 		fi
136 	elif [ "$msg" = no ]; then
137 		msg=""
138 	fi
139 
140 	cat >&3 <<EOF
141 ${1}: testing...
142 $COMP have/${1}.c $3 -o test-$1 $LDFLAGS $4
143 EOF
144 	if $COMP have/${1}.c $3 -o test-$1 $LDFLAGS $4 >&3 2>&3; then
145 		rm -f test-${1} test-${1}.d
146 
147 		echo "${1}: $CC$msg succeeded" >&3
148 		echo "${1}$msg: yes"
149 		echo >&3
150 
151 		return 0
152 	fi
153 
154 	echo "${1}: $CC$msg failed $?" >&3
155 	echo "${1}$msg: no"
156 	echo >&3
157 
158 	return 1
159 }
160 
161 # deptest name var
162 deptest() {
163 	if singletest "$1" "$2" "${CFLAGS}" "${LIBS}" no; then
164 		eval HAVE_${2}=1
165 		return 0
166 	fi
167 
168 	if [ -f compat/${1}.c ]; then
169 		COMPATS="compat/$1.c $COMPATS"
170 	fi
171 
172 	eval HAVE_${2}=0
173 	return 1
174 }
175 
176 # runtest name var extra-cflags extra-libs pkgconfig-name
177 runtest() {
178 	if singletest "$1" "$2" "" ""; then
179 		eval HAVE_${2}=1
180 		return 0
181 	fi
182 
183 	if [ -n "$3" -o -n "$4" ]; then
184 		echo "retrying with ${3+$3 }$4" >&3
185 		if singletest "$1" "$2" "$3" "$4"; then
186 			eval HAVE_${2}=1
187 			if [ "$3" = -D_GNU_SOURCE ]; then
188 				NEED_GNU_SOURCE=1
189 				return 0
190 			fi
191 			if [ "$4" = -D_OPENBSD_SOURCE ]; then
192 				NEED_OPENBSD_SOURCE=1
193 				return 0
194 			fi
195 			if [ -n "$3" ]; then
196 				CFLAGS="$CFLAGS $3"
197 			fi
198 			if [ -n "$4" ]; then
199 				LIBS="$LIBS $4"
200 			fi
201 			return 0
202 		fi
203 	fi
204 
205 	if [ -n "$5" -a -n "$pkgconfig" ]; then
206 		if $pkgconfig $5; then
207 			cflags="$($pkgconfig --cflags "$5")"
208 			ldflags="$($pkgconfig --libs "$5")"
209 			echo "retrying with pkg-config" >&3
210 			if singletest "$1" "$2" "$cflags" "$ldflags"; then
211 				CFLAGS="$CFLAGS $cflags"
212 				LIBS="$LIBS $ldflags"
213 				eval HAVE_$2=1
214 				return 0
215 			fi
216 		fi
217 	fi
218 
219 	if [ -f compat/$1.c ]; then
220 		COMPATS="compat/$1.c $COMPATS"
221 	fi
222 
223 	eval HAVE_$2=0
224 	return 1
225 }
226 
227 if [ "$PKG_CONFIG" = no ]; then
228 	echo "pkg-config: disabled"
229 elif [ -n "$PKG_CONFIG" ]; then
230 	pkgconfig="$PKG_CONFIG"
231 	echo "pkg-config: (manual) $PKG_CONFIG"
232 elif command -v pkg-config 2>/dev/null >&2; then
233 	pkgconfig="pkg-config"
234 	echo "pkg-config: (auto) pkg-config"
235 else
236 	echo "pkg-config: not found"
237 fi
238 
239 if singletest noop MMD -MMD; then
240 	CFLAGS="${CFLAGS} -MMD"
241 fi
242 
243 if ! runtest wait_any WAIT_ANY; then
244 	CFLAGS="${CFLAGS} -DWAIT_ANY=-1"
245 fi
246 
247 runtest err		ERR		|| true
248 runtest explicit_bzero	EXPLICIT_BZERO	|| true
249 runtest freezero	FREEZERO	|| true
250 runtest getdtablecount	GETDTABLECOUNT	|| true
251 runtest getdtablesize	GETDTABLESIZE	|| true
252 runtest getprogname	GETPROGNAME	|| true
253 runtest imsg		IMSG		"" -lutil libimsg || true
254 runtest libevent	LIBEVENT	"" -levent libevent_core|| true
255 runtest libtls		LIBTLS		"" -ltls libtls || true
256 runtest memmem		MEMMEM		-D_GNU_SOURCE || true
257 runtest openssl		OPENSSL		"" '-lcrypto -lssl' 'libcrypto libssl' || true
258 runtest pr_set_name	PR_SET_NAME	|| true
259 runtest program_invocation_short_name PROGRAM_INVOCATION_SHORT_NAME -D_GNU_SOURCE || true
260 runtest queue_h		QUEUE_H		|| true
261 runtest reallocarray	REALLOCARRAY	-D_OPENBSD_SOURCE	|| true
262 runtest recallocarray	RECALLOCARRAY	|| true
263 runtest setproctitle	SETPROCTITLE	|| true
264 runtest setresgid	SETRESGID	-D_GNU_SOURCE || true
265 runtest setresuid	SETRESUID	-D_GNU_SOURCE || true
266 runtest strlcat		STRLCAT		|| true
267 runtest strlcpy		STRLCPY		|| true
268 runtest strtonum	STRTONUM	-D_OPENBSD_SOURCE	|| true
269 runtest tree_h		TREE_H		|| true
270 runtest vasprintf	VASPRINTF	-D_GNU_SOURCE || true
271 
272 deptest libevent2	LIBEVENT2	|| true
273 
274 if [ ${HAVE_LIBTLS} -eq 0 ]; then
275 	echo "FATAL: libtls not found" 1>&2
276 	echo "FATAL: libtls not found" 1>&3
277 	exit 1
278 fi
279 
280 if [ ${HAVE_OPENSSL} -eq 0 ]; then
281 	echo "FATAL: openssl not found" 1>&2
282 	echo "FATAL: openssl not found" 1>&3
283 	exit 1
284 fi
285 
286 if [ ${HAVE_LIBEVENT} -eq 0 ]; then
287 	echo "FATAL: libevent not found" 1>&2
288 	echo "FATAL: libevent not found" 1>&3
289 	exit 1
290 fi
291 
292 if [ ${HAVE_IMSG} -eq 0 ]; then
293 	# compat/imsg.c is implicitly added
294 	COMPATS="$COMPATS compat/imsg-buffer.c"
295 fi
296 
297 if [ ${HAVE_QUEUE_H} -eq 0 -o ${HAVE_IMSG} -eq 0 -o ${HAVE_TREE_H} -eq 0 ]; then
298 	CFLAGS="${CFLAGS} -I ${PWD}/compat"
299 fi
300 
301 if [ $HAVE_LIBEVENT2 -eq 1 ]; then
302 	CFLAGS="$CFLAGS -DHAVE_LIBEVENT2=1"
303 fi
304 
305 if [ $NEED_GNU_SOURCE = 1 ]; then
306 	CFLAGS="$CFLAGS -D_GNU_SOURCE"
307 fi
308 if [ $NEED_OPENBSD_SOURCE = 1 ]; then
309 	CFLAGS="$CFLAGS -D_OPENBSD_SOURCE"
310 fi
311 
312 CFLAGS="${CFLAGS} ${CDIAGFLAGS}"
313 
314 exec > config.h
315 echo "config.h: writing.." >&2
316 
317 cat <<__HEREDOC__
318 #ifdef __cplusplus
319 #error "Do not use C++."
320 #endif
321 __HEREDOC__
322 
323 [ ${HAVE_STRLCAT} -eq 0 -o ${HAVE_STRLCPY} -eq 0 -o ${HAVE_IMSG} -eq 0 ] \
324 	&& echo "#include <sys/types.h>"
325 [ ${HAVE_VASPRINTF} -eq 0 ] && echo "#include <stdarg.h>"
326 
327 if [ ${HAVE_QUEUE_H} -eq 1 ]; then
328 	echo "#include <sys/queue.h>"
329 else
330 	echo "#include <queue.h>"
331 fi
332 
333 if [ ${HAVE_TREE_H} -eq 1 ]; then
334 	echo "#include <sys/tree.h>"
335 else
336 	echo "#include <tree.h>"
337 fi
338 
339 echo "#include <sys/types.h>"
340 echo "#include <sys/uio.h>"
341 echo "#include <stdint.h>"
342 echo "#include <imsg.h>"
343 echo "#include <limits.h>"
344 
345 cat <<__HEREDOC__
346 
347 #define VERSION			"${VERSION}"
348 #define DISABLE_SANDBOX		${DISABLE_SANDBOX}
349 
350 __HEREDOC__
351 
352 [ ${HAVE_EXPLICIT_BZERO} -eq 0 -o \
353   ${HAVE_FREEZERO} -eq 0 -o \
354   ${HAVE_REALLOCARRAY} -eq 0 -o \
355   ${HAVE_RECALLOCARRAY} -eq 0 -o \
356   ${HAVE_STRLCAT} -eq 0 -o \
357   ${HAVE_STRLCPY} -eq 0 -o \
358   ${HAVE_STRTONUM} -eq 0 ] && echo "#include <stddef.h>"
359 
360 [ ${HAVE_SETRESGID} -eq 0 -o \
361   ${HAVE_SETRESUID} -eq 0 ] && echo "#include <unistd.h>"
362 
363 if [ ${HAVE_ERR} -eq 0 ]; then
364 	echo "extern	void	 err(int, const char*, ...);"
365 	echo "extern	void	 errx(int, const char*, ...);"
366 	echo "extern	void	 warn(const char*, ...);"
367 	echo "extern	void	 warnx(const char*, ...);"
368 else
369 	echo "#include <err.h>"
370 fi
371 if [ ${HAVE_EXPLICIT_BZERO} -eq 0 ]; then
372 	echo "extern	void	 explicit_bzero(void*, size_t);"
373 fi
374 if [ ${HAVE_FREEZERO} -eq 0 ]; then
375 	echo "extern	void	 freezero(void*, size_t);"
376 fi
377 if [ ${HAVE_GETDTABLECOUNT} -eq 0 ]; then
378 	echo "extern	int	 getdtablecount(void);"
379 fi
380 if [ ${HAVE_GETDTABLESIZE} -eq 0 ]; then
381 	echo "extern	int	 getdtablesize(void);"
382 fi
383 if [ ${HAVE_GETPROGNAME} -eq 0 ]; then
384 	echo "extern	const char *getprogname(void);"
385 fi
386 if [ ${HAVE_MEMMEM} -eq 0 ]; then
387 	echo "extern void *memmem(const void *, size_t, const void *, size_t);"
388 fi
389 if [ ${HAVE_REALLOCARRAY} -eq 0 ]; then
390 	echo "extern	void	*reallocarray(void*, size_t, size_t);"
391 fi
392 if [ ${HAVE_RECALLOCARRAY} -eq 0 ]; then
393 	echo "extern	void	*recallocarray(void*, size_t, size_t, size_t);"
394 fi
395 if [ ${HAVE_SETPROCTITLE} -eq 0 ]; then
396 	echo "extern	void	 setproctitle(const char *fmt, ...);"
397 fi
398 if [ ${HAVE_SETRESGID} -eq 0 ]; then
399 	echo "extern	int	 setresgid(gid_t, gid_t, gid_t);"
400 fi
401 if [ ${HAVE_SETRESUID} -eq 0 ]; then
402 	echo "extern	int	 setresuid(uid_t, uid_t, uid_t);"
403 fi
404 if [ ${HAVE_STRLCAT} -eq 0 ]; then
405 	echo "extern	size_t	 strlcat(char*, const char*, size_t);"
406 fi
407 if [ ${HAVE_STRLCPY} -eq 0 ]; then
408 	echo "extern	size_t	 strlcpy(char*, const char*, size_t);"
409 fi
410 if [ ${HAVE_STRTONUM} -eq 0 ]; then
411 	echo "extern	long long strtonum(const char*, long long, long long, const char**);"
412 fi
413 if [ ${HAVE_VASPRINTF} -eq 0 ]; then
414 	echo "extern	int	 vasprintf(char**, const char*, va_list);"
415 fi
416 
417 cat <<__HEREDOC__
418 
419 #ifndef __dead
420 #define __dead __attribute__((noreturn))
421 #endif
422 
423 /* Linux and OpenBSD have LOGIN_NAME_MAX, FreeBSD MAXLOGNAME. */
424 #ifndef LOGIN_NAME_MAX
425 # if defined(MAXLOGNAME)
426 #  define LOGIN_NAME_MAX MAXLOGNAME
427 # elif defined(_POSIX_LOGIN_NAME_MAX)
428 #  define LOGIN_NAME_MAX _POSIX_LOGIN_NAME_MAX
429 # else
430 #  define LOGIN_NAME_MAX 32
431 # endif
432 #endif
433 
434 #ifndef HOST_NAME_MAX
435 # if defined(_POSIX_HOST_NAME_MAX)
436 #  define HOST_NAME_MAX _POSIX_HOST_NAME_MAX
437 # else
438 #  define HOST_NAME_MAX 255
439 # endif
440 #endif
441 __HEREDOC__
442 
443 echo "file config.h: written" 1>&2
444 echo "file config.h: written" 1>&3
445 
446 exec > config.mk
447 
448 [ -z "${BINDIR}"          ] && BINDIR="\${PREFIX}/bin"
449 [ -z "${MANDIR}"          ] && MANDIR="\${PREFIX}/man"
450 
451 [ -z "${INSTALL_PROGRAM}" ] && INSTALL_PROGRAM="${INSTALL} -m 0555"
452 [ -z "${INSTALL_LIB}"     ] && INSTALL_LIB="${INSTALL} -m 0444"
453 [ -z "${INSTALL_MAN}"     ] && INSTALL_MAN="${INSTALL} -m 0444"
454 [ -z "${INSTALL_DATA}"    ] && INSTALL_DATA="${INSTALL} -m 0444"
455 
456 cat << __HEREDOC__
457 CC		= ${CC}
458 CFLAGS		= ${CFLAGS}
459 LDFLAGS		= ${LDFLAGS}
460 LIBS		= ${LIBS}
461 YACC		= ${YACC}
462 STATIC		= ${STATIC}
463 PREFIX		= ${PREFIX}
464 BINDIR		= ${BINDIR}
465 MANDIR		= ${MANDIR}
466 
467 INSTALL		= install
468 INSTALL_PROGRAM	= ${INSTALL} -m 0555
469 INSTALL_LIB	= ${INSTALL} -m 0444
470 INSTALL_MAN	= ${INSTALL} -m 0444
471 INSTALL_DATA	= ${INSTALL} -m 0444
472 
473 COMPATS=	${COMPATS}
474 
475 VERSION		= ${VERSION}
476 
477 __HEREDOC__
478 
479 echo "file config.mk: written" 1>&2
480 echo "file config.mk: written" 1>&3
481 
482 echo >&2
483 echo "Now run \`make' to compile." >&2
484 echo >&2
485 
486 exit 0