1 # Process this file with autoconf to produce a configure script.
2 
3 AC_PREREQ([2.69])
4 AC_INIT([got-portable],
5 	m4_esyscmd_s(util/got-portable-ver.sh),
6 	[thomas@xteddy.org])
7 AC_CONFIG_AUX_DIR(etc)
8 AC_CONFIG_SRCDIR([lib/rcsutil.h])
9 AM_INIT_AUTOMAKE([foreign subdir-objects])
10 
11 AC_CONFIG_HEADERS([include/got_compat.h])
12 
13 AC_DEFINE_UNQUOTED(VERSION, $VERSION)
14 AC_SUBST(VERSION)
15 AC_SUBST(GOT_RELEASE)
16 
17 AC_DEFINE_UNQUOTED([GOT_VERSION], VERSION, [GoT version string])
18 AC_DEFINE_UNQUOTED([GOT_VERSION_NUMBER], VERSION, [Got version number])
19 
20 AC_USE_SYSTEM_EXTENSIONS
21 AC_CANONICAL_HOST
22 
23 AC_CONFIG_SUBDIRS([template])
24 AC_ARG_ENABLE([cvg],
25 	       AS_HELP_STRING([--enable-cvg],
26 			      [EXPERIMENTAL: cvg - cvs-like-git]))
27 
28 # Override gotd's empty_path location.
29 AC_ARG_WITH([gotd-empty-path],
30 	    [AS_HELP_STRING([--with-gotd-empty-path],
31 			    [gotd empty path])
32 	    ],
33 	    [GOTD_EMPTY_PATHC=$withval]
34 	    [])
35 AC_SUBST(GOTD_EMPTY_PATHC)
36 
37 # Override where git's libexec helpers are located for gitwrapper.
38 AC_ARG_WITH([gitwrapper-git-libexec-path],
39 	    [AS_HELP_STRING([--with-gitwrapper-git-libexec-path],
40 			    [git libexec path for gitwrapper])
41 	    ],
42 	    [GITWRAPPER_LIBEXEC_PATHC=$withval]
43 	    [])
44 AC_SUBST(GITWRAPPER_LIBEXEC_PATHC)
45 
46 # When CFLAGS isn't set at this stage and gcc is detected by the macro below,
47 # autoconf will automatically use CFLAGS="-O2 -g". Prevent that by using an
48 # empty default.
49 : ${CFLAGS=""}
50 
51 # Save user CPPFLAGS, CFLAGS and LDFLAGS. We need to change them because
52 # AC_CHECK_HEADER doesn't give us any other way to update the include
53 # paths. But for Makefile.am we want to use AM_CPPFLAGS and friends.
54 SAVED_CFLAGS="$CFLAGS"
55 SAVED_CPPFLAGS="$CPPFLAGS"
56 SAVED_LDFLAGS="$LDFLAGS"
57 
58 # YACC override
59 YACC_OVERRIDE="yes"
60 
61 # Checks for programs.
62 AC_PROG_CC
63 AC_PROG_CPP
64 AC_PROG_INSTALL
65 AC_PROG_LN_S
66 AC_PROG_MAKE_SET
67 if test -z "$YACC"; then
68 YACC_OVERRIDE="no"
69 AC_PROG_YACC
70 fi
71 AM_PROG_AR
72 AC_PROG_RANLIB
73 PKG_PROG_PKG_CONFIG
74 
75 if test "$YACC_OVERRIDE" = "yes"; then
76 	AC_MSG_NOTICE("Using YACC set from environment: $YACC")
77 fi
78 
79 # Checks for header files.
80 AC_CHECK_HEADERS([ \
81 	fcntl.h \
82 	getopt.h \
83 	langinfo.h \
84 	libutil.h \
85 	limits.h \
86 	linux/landlock.h \
87 	locale.h \
88 	netdb.h \
89 	netinet/in.h \
90 	paths.h \
91 	poll.h \
92 	sha.h \
93 	sha1.h \
94 	sha2.h \
95 	sha256.h \
96 	stddef.h \
97 	stdint.h \
98 	stdlib.h \
99 	string.h \
100 	sys/ioctl.h \
101 	sys/param.h \
102 	sys/poll.h \
103 	sys/queue.h \
104 	sys/select.h \
105 	sys/socket.h \
106 	sys/time.h \
107 	sys/tree.h \
108 	tls.h \
109 	util.h \
110 	unistd.h \
111 	wchar.h \
112 ])
113 
114 AC_HEADER_DIRENT
115 AC_CHECK_DECL([F_CLOSEM],
116 	      HAVE_FCNTL_CLOSEM
117 	      AC_DEFINE([HAVE_FCNTL_CLOSEM], [1],
118 			[Use F_CLOSEM fcntl for closefrom]),
119 			[],
120 			[#include <limits.h>
121 			 #include <fcntl.h>
122 			]
123 )
124 
125 AC_MSG_CHECKING([for /proc/pid/fd directory])
126 if test -d "/proc/$$/fd" ; then
127 	AC_DEFINE([HAVE_PROC_PID], [1], [Define if you have /proc/$pid/fd])
128 	AC_MSG_RESULT([yes])
129 else
130 	AC_MSG_RESULT([no])
131 fi
132 
133 AC_MSG_CHECKING([whether program_invocation_short_name is defined])
134 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
135 	#include <argp.h>
136 ]], [[
137 	program_invocation_short_name = "test";
138 ]])], [
139 	AC_MSG_RESULT([yes])
140 	AC_DEFINE([HAVE_PROGRAM_INVOCATION_SHORT_NAME], [1],
141 		[Define if program_invocation_short_name is defined])
142 ], [
143 	AC_MSG_RESULT([no])
144 ])
145 
146 # Look for prctl(PR_SET_NAME).
147 AC_CHECK_DECL(
148 	[PR_SET_NAME],
149 	[AC_DEFINE([HAVE_PR_SET_NAME], [1], [Define if PR_SET_NAME is defined])],
150 	[],
151 	[#include <sys/prctl.h>]
152 )
153 
154 AM_CONDITIONAL([HAVE_SHA2], [test "x$ac_cv_header_sha2_h" = xyes || \
155 	test "x$ac_cv_header_sha256_h" = xyes])
156 
157 AC_CACHE_CHECK([whether getopt has optreset support],
158 		ac_cv_have_getopt_optreset, [
159 	AC_LINK_IFELSE([AC_LANG_PROGRAM([[ #include <getopt.h> ]],
160 		[[ extern int optreset; optreset = 0; ]])],
161 	[ ac_cv_have_getopt_optreset="yes" ],
162 	[ ac_cv_have_getopt_optreset="no"
163 	])
164 ])
165 
166 AM_CONDITIONAL([HAVE_GETOPT], [test "x$ac_cv_have_getopt_optreset" = "xyes"])
167 if test "x$ac_cv_have_getopt_optreset" = "xyes" ; then
168 	AC_DEFINE([HAVE_GETOPT_OPTRESET], [1],
169 		[Define if your getopt(3) defines and uses optreset])
170 fi
171 
172 AC_CHECK_MEMBERS([struct pollfd.fd], [], [], [[
173 #include <sys/types.h>
174 #ifdef HAVE_POLL_H
175 #include <poll.h>
176 #endif
177 #ifdef HAVE_SYS_POLL_H
178 #include <sys/poll.h>
179 #endif
180 ]])
181 
182 # Checks for typ edefs, structures, and compiler characteristics.
183 AC_CHECK_HEADER_STDBOOL
184 AC_C_INLINE
185 AC_TYPE_INT64_T
186 AC_TYPE_MODE_T
187 AC_TYPE_OFF_T
188 AC_TYPE_PID_T
189 AC_TYPE_SIZE_T
190 AC_TYPE_SSIZE_T
191 AC_TYPE_UINT16_T
192 AC_TYPE_UINT32_T
193 AC_TYPE_UINT64_T
194 AC_TYPE_UINT8_T
195 
196 # Check for ifgroupreq which is only available on BSD.
197 AC_CHECK_TYPES([struct ifgroupreq])
198 
199 # Check for sockaddr_storage.  On some systems, ss_len is filled out, although
200 # this is not mandated by POSIX, and hence systems such as linux, don't have
201 # it.
202 AC_CHECK_TYPES([struct sockaddr_storage], [], [], [
203 #include <sys/types.h>
204 #include <sys/socket.h>
205 ])
206 
207 # Same thing as sockaddr_storage above, only now check if the member exists in
208 # the struct as well.
209 AC_CHECK_MEMBERS([struct sockaddr_storage.ss_len], , ,
210 	[ #include <netdb.h>
211 	  #include <netinet/in.h>
212 	  #include <sys/socket.h> ]
213 )
214 
215 AC_CHECK_MEMBERS([struct sockaddr.sa_len], , ,
216 	[ #include <netdb.h>
217 	  #include <netinet/in.h>
218 	  #include <sys/socket.h> ]
219 )
220 
221 # Both checks above will result in:
222 #
223 # HAVE_STRUCT_SOCKADDR_AS_LEN
224 # SS_LEN
225 #
226 # Either being defined or not.
227 
228 # Look for library needed for flock.
229 AC_SEARCH_LIBS(flock, bsd)
230 
231 # Checks for library functions.
232 AC_FUNC_FORK
233 AC_FUNC_FSEEKO
234 AC_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK
235 AC_FUNC_MALLOC
236 AC_FUNC_MMAP
237 AC_FUNC_REALLOC
238 AC_FUNC_STRERROR_R
239 AC_FUNC_STRNLEN
240 AC_CHECK_FUNCS([ \
241 	dup2 \
242 	flock \
243 	getcwd \
244 	localtime_r \
245 	memchr \
246 	memmove \
247 	memset \
248 	mergesort \
249 	mkdir \
250 	munmap \
251 	nl_langinfo \
252 	realpath \
253 	regcomp \
254 	rmdir \
255 	setlocale \
256 	socket \
257 	setresgid \
258 	setresuid \
259 	setproctitle \
260 	strcasecmp \
261 	strchr \
262 	strcspn \
263 	strdup \
264 	strerror \
265 	strncasecmp \
266 	strndup \
267 	strrchr \
268 	strspn \
269 	strstr \
270 	strtol \
271 	strtoul \
272 	sysconf \
273 	wcwidth \
274 ])
275 
276 AM_CONDITIONAL([HAVE_SETPROCTITLE], [test "x$ac_cv_func_setproctitle" = xyes])
277 
278 if test "x$ac_cv_func_sysconf" = xyes; then
279 	AC_DEFINE([HAVE_SYSCONF], [1], [Define to 1 if sysconf() present])
280 fi
281 
282 # Siphash support.
283 AC_CHECK_FUNCS([SipHash])
284 AM_CONDITIONAL([HAVE_SIPHASH], [test "x$ac_cv_func_SipHash" = xyes])
285 
286 # Check for functions with a compatibility implementation.
287 AC_REPLACE_FUNCS([ \
288 	asprintf \
289 	closefrom \
290 	explicit_bzero \
291 	fmt_scaled \
292 	freezero \
293 	getdtablecount \
294 	getline \
295 	getprogname \
296 	recallocarray \
297 	reallocarray \
298 	strlcat \
299 	strlcpy \
300 	strndup \
301 	strnlen \
302 	strsep \
303 	strtonum \
304 ])
305 AM_CONDITIONAL([HAVE_CLOSEFROM], [test "x$ac_cv_func_closefrom" = xyes])
306 
307 # Always use our getopt because 1) glibc's doesn't enforce argument order 2)
308 # musl does not set optarg to NULL for flags without arguments (although it is
309 # not required to, but it is helpful) 3) there are probably other weird
310 # implementations.
311 AC_LIBOBJ(getopt)
312 
313 # Check for b64_ntop. If we have b64_ntop, we assume b64_pton as well.
314 AC_MSG_CHECKING(for b64_ntop)
315 	AC_LINK_IFELSE([AC_LANG_PROGRAM(
316 	[
317 		#include <sys/types.h>
318 		#include <netinet/in.h>
319 		#include <resolv.h>
320 	],
321 	[
322 		b64_ntop(NULL, 0, NULL, 0);
323 	])],
324 	found_b64_ntop=yes,
325 	found_b64_ntop=no
326 )
327 AC_MSG_RESULT($found_b64_ntop)
328 libresolv_LIBS=""
329 if test "x$found_b64_ntop" = xno; then
330 	AC_MSG_CHECKING(for b64_ntop with -lresolv)
331 	LIBS="-lresolv"
332 	AC_LINK_IFELSE([AC_LANG_PROGRAM(
333 		[
334 			#include <sys/types.h>
335 			#include <netinet/in.h>
336 			#include <resolv.h>
337 		],
338 		[
339 			b64_ntop(NULL, 0, NULL, 0);
340 		])],
341 		found_b64_ntop=yes,
342 		found_b64_ntop=no
343 	)
344 	AC_MSG_RESULT($found_b64_ntop)
345 	libresolv_LIBS="$LIBS"
346 fi
347 if test "x$found_b64_ntop" = xno; then
348 	AC_MSG_CHECKING(for b64_ntop with -lnetwork)
349 	LIBS="-lresolv -lnetwork"
350 	AC_LINK_IFELSE([AC_LANG_PROGRAM(
351 		[
352 			#include <sys/types.h>
353 			#include <netinet/in.h>
354 			#include <resolv.h>
355 		],
356 		[
357 			b64_ntop(NULL, 0, NULL, 0);
358 		])],
359 		found_b64_ntop=yes,
360 		found_b64_ntop=no
361 	)
362 	AC_MSG_RESULT($found_b64_ntop)
363 	libresolv_LIBS="$LIBS"
364 fi
365 
366 AM_CONDITIONAL([HAVE_B64], [test "x$found_b64_ntop" = xyes])
367 if test "x$found_b64_ntop" = xyes; then
368 	AC_DEFINE([HAVE_B64_NTOP], [1], [define if b64_ntop is present])
369 	AC_SUBST(libresolv_LIBS)
370 else
371 	AC_LIBOBJ(base64)
372 fi
373 
374 # Check the platform we're compiling on.
375 AC_MSG_CHECKING(platform)
376 case "$host_os" in
377 	*linux*)
378 		AC_MSG_RESULT(linux)
379 		PLATFORM=linux
380 		;;
381 	*freebsd*)
382 		AC_MSG_RESULT(freebsd)
383 		PLATFORM=freebsd
384 		;;
385 	*darwin*)
386 		AC_MSG_RESULT(darwin)
387 		PLATFORM=darwin
388 		;;
389 	*netbsd*)
390 		AC_MSG_RESULT(netbsd)
391 		PLATFORM=netbsd
392 		;;
393 	*openbsd*)
394 		AC_MSG_RESULT(openbsd)
395 		PLATFORM=openbsd
396 		;;
397 	*dragonfly*)
398 		AC_MSG_RESULT(dragonfly)
399 		PLATFORM=dragonflybsd
400 		;;
401 	*)
402 		AC_MSG_RESULT(unknown)
403 		PLATFORM=unknown
404 		;;
405 esac
406 AC_SUBST(PLATFORM)
407 AM_CONDITIONAL([HOST_FREEBSD], [test "$PLATFORM" = "freebsd"])
408 AM_CONDITIONAL([HOST_LINUX], [test "$PLATFORM" = "linux"])
409 AM_CONDITIONAL([HOST_DARWIN], [test "$PLATFORM" = "darwin"])
410 AM_CONDITIONAL([HOST_NETBSD], [test "$PLATFORM" = "netbsd"])
411 AM_CONDITIONAL([HOST_OPENBSD], [test "$PLATFORM" = "openbsd"])
412 AM_CONDITIONAL([HOST_DRAGONFLYBSD], [test "$PLATFORM" = "dragonflybsd"])
413 
414 # On OpenBSD, these functions are already defined, yet looking for them in
415 # this way on OpenBSD breaks <sha2.h> inclusion.
416 # FIXME: this needs addressing.
417 if test "x$PLATFORM" != "xopenbsd"; then
418 	AC_CHECK_FUNCS([SHA256Update])
419 fi
420 
421 # Look for yacc.
422 if test "YACC_OVERRIDE" = "yes" && test -n "$YACC" \
423 	&& ! command -v "$YACC" >/dev/null 2>&1; then
424 	AC_MSG_ERROR("yacc not found: $YACC")
425 fi
426 
427 if test x"$PLATFORM" = "xdarwin"; then
428 	# Check for and/or set HOMEBREW_PREFIX.  brew is a common way of
429 	# installing applications.  The other is MacPorts.
430 	#
431 	# Before Apple Silicon existed (M1 onward), the paths for applications
432 	# installed via homebrew was typically /usr/local.  However, with M1
433 	# onward, this changed to a different path.
434 	#
435 	# Rather than hardcode this, check for HOMEBREW_PREFIX in the
436 	# environment if it's already set, and use it.  Otherwise, check for
437 	# brew(1) and use that.  If that fails, default to /usr/local
438 	#
439 	# This also means that MacPorts should continue to work.
440 	#
441 	# But with MacPorts, we should also check --prefix, and use that if it
442 	# has been supplied.
443 	#
444 	# In both cases, the variable HOMEBREW_PREFIX is used for both.
445 	HB_PREFIX=""
446 	FOUND_BISON="no"
447 	GNUBISON=""
448 	if test -z "$HOMEBREW_PREFIX" -o "$HOMEBREW_PREFIX" = "NONE"; then
449 		# HOMEBREW_PREFIX not set, check for brew(1)
450 		if command -v brew >/dev/null 2>&1; then
451 			AC_MSG_NOTICE("HOMEBREW_PREFIX set via 'brew --prefix'")
452 			export HOMEBREW_PREFIX="$(brew --prefix)"
453 		fi
454 
455 		if test -z "$HOMEBREW_PREFIX" -o "$HOMEBREW_PREFIX" = "NONE"
456 		then
457 			# Default.
458 			if test -z "${prefix}" -o "${prefix}" = "NONE"; then
459 				export HOMEBREW_PREFIX="/usr/local"
460 				HB_PREFIX="/usr/local"
461 				AC_MSG_NOTICE("HOMEBREW_PREFIX defaulting to $HB_PREFIX")
462 			else
463 				HB_PREFIX="$(eval echo ${prefix})"
464 				if test "$HB_PREFIX" = "NONE"; then
465 					HB_PREFIX="/opt/local"
466 				else
467 					AC_MSG_NOTICE("HOMEBREW_PREFIX using --prefix")
468 				fi
469 				export HOMEBREW_PREFIX="$HB_PREFIX"
470 			fi
471 		fi
472 	fi
473 
474 	AC_MSG_NOTICE("HOMEBREW_PREFIX determined as: $HOMEBREW_PREFIX")
475 
476 	if test "$YACC_OVERRIDE" = "no" && \
477 		! test -x "${HOMEBREW_PREFIX}/opt/bison/bin/bison"; then
478 		AC_MSG_WARN([
479 			     "***********************************************************
480 			     GNU Bison not found: ${HOMEBREW_PREFIX}/opt/bison/bin/bison
481 			     ***********************************************************
482 
483 			     Falling back to checking either /usr/local or \${prefix}"
484 		])
485 
486 		FOUND_BISON="no"
487 		AC_MSG_WARN("Trying ${HB_PREFIX}/opt/bison/bin/bison")
488 		if test -x "${HB_PREFIX}/opt/bison/bin/bison"; then
489 			export HOMEBREW_PREFIX="/usr/local"
490 			FOUND_BISON="yes"
491 			GNUBISON="${HB_PREFIX}/opt/bison/bin/bison"
492 		fi
493 
494 		if test "$FOUND_BISON" = "no"; then
495 			HB_PREFIX="/opt/local"
496 			AC_MSG_WARN("Trying ${HB_PREFIX}/bin/bison")
497 
498 			if test -x "${HB_PREFIX}/bin/bison"; then
499 				export HOMEBREW_PREFIX="${HB_PREFIX}"
500 				GNUBISON="${HB_PREFIX}/bin/bison"
501 				FOUND_BISON="yes"
502 			fi
503 		fi
504 	else
505 		FOUND_BISON="yes"
506 		GNUBISON="${HOMEBREW_PREFIX}/opt/bison/bin/bison"
507 	fi
508 
509 	if test "$FOUND_BISON" = "no" && test "$YACC_OVERRIDE" = "no"; then
510 		AC_MSG_ERROR("*** Couldn't find GNU BISON ***")
511 	fi
512 
513 	# Override YACC here to point to the GNU version of bison.
514 	if test "$YACC_OVERRIDE" = "yes"; then
515 		export YACC="$YACC -y"
516 	else
517 		AC_MSG_NOTICE("Found GNU Bison as: $GNUBISON")
518 		export YACC="${GNUBISON} -y"
519 	fi
520 	export LDFLAGS="-L${HOMEBREW_PREFIX}/opt/ncurses/lib -L${HOMEBREW_PREFIX}/opt/openssl@3/lib $LDFLAGS"
521 	export CPPFLAGS="-I${HOMEBREW_PREFIX}/opt/ncurses/include -I${HOMEBREW_PREFIX}/opt/openssl@3/include $CPPFLAGS"
522 	export PKG_CONFIG_PATH="${HOMEBREW_PREFIX}/opt/ncurses/lib/pkgconfig"
523 	export PKG_CONFIG_PATH="$PKG_CONFIG_PATH:${HOMEBREW_PREFIX}/opt/openssl@3/lib/pkgconfig"
524 fi
525 
526 # Landlock detection.
527 AC_MSG_CHECKING([for landlock])
528 AM_CONDITIONAL([HAVE_LINUX_LANDLOCK],
529     [test "x$ac_cv_header_linux_landlock_h" = "xyes"])
530 if test "x$ac_cv_header_linux_landlock_h" = "xyes"; then
531 	AC_MSG_RESULT(yes)
532 else
533 	AC_MSG_RESULT(no)
534 fi
535 
536 # Clang sanitizers wrap reallocarray even if it isn't available on the target
537 # system. When compiled it always returns NULL and crashes the program. To
538 # detect this we need a more complicated test.
539 AC_MSG_CHECKING([for working reallocarray])
540 AC_RUN_IFELSE([AC_LANG_PROGRAM(
541 		[#include <stdlib.h>],
542 		[return (reallocarray(NULL, 1, 1) == NULL);]
543 	)],
544 	AC_MSG_RESULT(yes),
545 	[AC_LIBOBJ(reallocarray) AC_MSG_RESULT([no])],
546 	[AC_LIBOBJ(reallocarray) AC_MSG_RESULT([no])]
547 )
548 AC_MSG_CHECKING([for working recallocarray])
549 AC_RUN_IFELSE([AC_LANG_PROGRAM(
550 		[#include <stdlib.h>],
551 		[return (recallocarray(NULL, 1, 1, 1) == NULL);]
552 	)],
553 	AC_MSG_RESULT(yes),
554 	[AC_LIBOBJ(recallocarray) AC_MSG_RESULT([no])],
555 	[AC_LIBOBJ(recallocarray) AC_MSG_RESULT([no])]
556 )
557 
558 # Look for imsg_init in libutil.
559 AC_SEARCH_LIBS(imsg_init, util, found_imsg_init=yes, found_imsg_init=no)
560 AM_CONDITIONAL([HAVE_IMSG], [test "x$found_imsg_init" = "xyes"])
561 if test "x$found_imsg_init" = "xyes"; then
562 	AC_DEFINE([HAVE_IMSG], [1], [Define to 1 if imsg is declared in libutil])
563 	libutil_LIBS="$ac_cv_search_imsg_init"
564 	AC_SUBST(libutil_LIBS)
565 fi
566 
567 # libevent (for gotwebd).  Lifted from tmux.
568 # Look for libevent. Try libevent_core or libevent with pkg-config first then
569 # look for the library.
570 found_libevent=no
571 PKG_CHECK_MODULES(
572 	LIBEVENT_CORE,
573 	[libevent_core >= 2],
574 	[
575 		libevent_CFLAGS="$LIBEVENT_CORE_CFLAGS"
576 		libevent_LIBS="$LIBEVENT_CORE_LIBS"
577 		AC_SUBST(libevent_CFLAGS)
578 		AC_SUBST(libevent_LIBS)
579 		found_libevent=yes
580 	],
581 	found_libevent=no
582 )
583 if test x$found_libevent = xno; then
584 	PKG_CHECK_MODULES(
585 		LIBEVENT,
586 		[libevent >= 2],
587 		[
588 			libevent_CFLAGS="$LIBEVENT_CFLAGS"
589 			libevent_LIBS="$LIBEVENT_LIBS"
590 			AC_SUBST(libevent_CFLAGS)
591 			AC_SUBST(libevent_LIBS)
592 			found_libevent=yes
593 		],
594 		found_libevent=no
595 	)
596 fi
597 if test x$found_libevent = xno; then
598 	AC_SEARCH_LIBS(
599 		event_init,
600 		[event_core event event-1.4],
601 		found_libevent=yes,
602 		found_libevent=no
603 	)
604 
605 	if test "x$found_libevent" = "xyes"; then
606 		libevent_LIBS="$ac_cv_search_event_init"
607 		AC_SUBST(libevent_LIBS)
608 	fi
609 fi
610 
611 if test x$found_libevent = xno; then
612 AC_CHECK_HEADER(
613 	event2/event.h,
614 	AC_DEFINE([HAVE_EVENT2_EVENT_H], [1], [libevent2 has event.h]),
615 	[
616 		AC_CHECK_HEADER(
617 			event.h,
618 			AC_DEFINE([HAVE_EVENT_H], [0], [libevent]),
619 			found_libevent=no
620 		)
621 	]
622 )
623 fi
624 
625 if test "x$found_libevent" = xno; then
626 	AC_MSG_ERROR("libevent not found")
627 fi
628 
629 AC_CHECK_FUNC([uuid_create], [found_uuid=yes], [found_uuid=no])
630 
631 # Don't define HAVE_BSD_UUID on darwin (Apple) as this breaks the BSD API.
632 # Instead, use the UUID implementation wrapper that's in compat/ plus uuid
633 # ossp
634 if test "x$found_uuid" = "xyes" -a "x$PLATFORM" != "darwin"; then
635 	AC_DEFINE([HAVE_BSD_UUID], [1], [BSD UUID])
636 else
637 	PKG_CHECK_MODULES(
638 		LIBUUID,
639 		uuid,
640 		[
641 			libuuid_CFLAGS="$LIBUUID_CFLAGS"
642 			libuuid_LIBS="$LIBUUID_LIBS"
643 			AC_SUBST(libuuid_CFLAGS)
644 			AC_SUBST(libuuid_LIBS)
645 			found_libuuid=yes
646 		],
647 		[
648 			found_libuuid=no
649 		]
650 	)
651 
652 	if test "x$found_libuuid" = "xno"; then
653 		AC_CHECK_HEADER(
654 			uuid.h,
655 			found_libuuid=yes,
656 			found_libuuid=no)
657 	fi
658 fi
659 
660 if test "x$found_libuuid" = "xno"; then
661 	AC_MSG_ERROR("*** couldn't find uuid ***")
662 fi
663 
664 PKG_CHECK_MODULES(
665 	ZLIB,
666 	zlib,
667 	[
668 		zlib_CFLAGS="$ZLIB_CFLAGS"
669 		zlib_LIBS="$ZLIB_LIBS"
670 		AC_SUBST(zlib_CFLAGS)
671 		AC_SUBST(zlib_LIBS)
672 		found_zlib=yes
673 	],
674 	[
675 	 	found_zlib=no
676 	]
677 )
678 
679 if test "x$found_zlib" = "xno"; then
680 	AC_CHECK_HEADER(
681 		zlib.h,
682 		,
683 		found_zlib=no)
684 fi
685 
686 if test "x$found_zlib" = "xno"; then
687 	AC_MSG_ERROR("*** couldn't find zlib ***")
688 fi
689 
690 if test "$PLATFORM" = "linux"; then
691 	PKG_CHECK_MODULES(
692 		LIBBSD,
693 		libbsd-overlay,
694 		[
695 		 	libbsd_CFLAGS="$LIBBSD_CFLAGS"
696 			libbsd_LIBS="$LIBBSD_LIBS"
697 			AC_SUBST(libbsd_CFLAGS)
698 			AC_SUBST(libbsd_LIBS)
699 			AC_DEFINE([HAVE_LIBBSD], [1], [BSD UUID])
700 		],
701 		[
702 			AC_MSG_ERROR("*** couldn't find libbsd-overlay via pkg-config")
703 		]
704 
705 	)
706 
707 	# Add LIBBSD_{CFLAGS,LIBS} to the environment here, as libbsd puts its
708 	# header files in a non-standard location, which means the overlay for
709 	# <sys/tree.h> and <sys/queue.h> won't be found.
710 	CFLAGS="$CFLAGS $LIBBSD_CFLAGS"
711 	LIBS="$LIBS $LIBBSD_LIBS"
712 
713 	PKG_CHECK_MODULES(
714 		LIBMD,
715 		libmd,
716 		[
717 		     libmd_CFLAGS="$LIBMD_CFLAGS"
718 		     libmd_LIBS="$LIBMD_LIBS"
719 		     AC_SUBST(libmd_CFLAGS)
720 		     AC_SUBST(libmd_LIBS)
721 		], []
722 	)
723 	CFLAGS="$CFLAGS $LIBMD_CFLAGS"
724 	LIBS="$LIBS $LIBMD_LIBS"
725 
726 fi
727 
728 # Look for a suitable queue.h.  We hope libbsd is enough, but that is missing
729 # some declarations.
730 AC_CHECK_DECL(
731 	TAILQ_CONCAT,
732 	found_queue_h=yes,
733 	found_queue_h=no,
734 	[#include <sys/queue.h>]
735 )
736 AC_CHECK_DECL(
737 	TAILQ_PREV,
738 	,
739 	found_queue_h=no,
740 	[#include <sys/queue.h>]
741 )
742 AC_CHECK_DECL(
743 	TAILQ_FOREACH_SAFE,
744 	,
745 	found_queue_h=no,
746 	[#include <sys/queue.h>]
747 )
748 
749 if test "x$found_queue_h" = xyes; then
750 	AC_DEFINE([HAVE_QUEUE_H], [1], [sys/queue.h])
751 else
752 	AC_MSG_ERROR("*** sys/queue.h missing key defines ***)
753 fi
754 
755 AC_CHECK_DECL(
756 	RB_GENERATE_STATIC,
757 	found_sys_tree_h=yes,
758 	found_sys_tree_h=no,
759 	[#include <sys/tree.h>]
760 )
761 
762 #FIXME: May need OS-wrapping.
763 PKG_CHECK_MODULES(
764 	LIBTLS,
765 	[libtls],
766 	[
767 		libtls_CFLAGS="$LIBTLS_CFLAGS"
768 		libtls_LIBS="$LIBTLS_LIBS"
769 		AC_SUBST(libtls_CFLAGS)
770 		AC_SUBST(libtls_LIBS)
771 	],
772 	AC_MSG_ERROR(["*** Couldn't find libtls ***"])
773 )
774 
775 # Look for __progname.
776 AC_MSG_CHECKING(for __progname)
777 AC_LINK_IFELSE([AC_LANG_SOURCE(
778 	[
779 		#include <stdio.h>
780 		#include <stdlib.h>
781 		extern char *__progname;
782 		int main(void) {
783 			const char *cp = __progname;
784 			printf("%s\n", cp);
785 			exit(0);
786 		}
787 	])],
788 	[AC_DEFINE([HAVE___PROGNAME], [1], [___progname]) AC_MSG_RESULT(yes)],
789 	[AC_MSG_RESULT(no)]
790 )
791 
792 PKG_CHECK_MODULES(
793 	LIBPANELW,
794 	panelw,
795 	LIBPANELW_LIBS="$LIBPANELW_LIBS"
796 	found_panel=yes,
797 	found_panel=no
798 )
799 
800 if test "x$found_panel" = "xno"; then
801 PKG_CHECK_MODULES(
802 	LIBPANELW,
803 	gnupanelw,
804 	[
805 		LIBPANELW_LIBS="$LIBPANELW_LIBS"
806 		found_panel=yes
807 	],
808 	found_panel=no
809 )
810 fi
811 
812 if test "x$found_panel" = "xno"; then
813 PKG_CHECK_MODULES(
814 	LIBPANELW,
815 	panel,
816 	[
817 		LIBPANELW_LIBS="$LIBPANELW_LIBS"
818 		found_panel=yes
819 	],
820 	found_panel=no
821 )
822 fi
823 
824 if test "x$found_panel" = "xno"; then
825 	AC_CHECK_LIB(panelw, update_panels, [],
826 		AC_MSG_ERROR([ "*** panelw not found for ncurses. ***"]),
827 		[-lncurses]
828 	)
829 
830 fi
831 
832 PKG_CHECK_MODULES(
833 	LIBNCURSES,
834 	ncursesw,
835 	found_ncurses=yes,
836 	found_ncurses=no
837 )
838 if test "x$found_ncurses" = xyes; then
839 	libncurses_CFLAGS="$LIBNCURSES_CFLAGS $LIBTINFO_CFLAGS $LIBPANELW_CFLAGS"
840 	libncurses_LIBS="$LIBNCURSES_LIBS $LIBTINFO_LIBS $LIBPANELW_LIBS"
841 	AC_SUBST(libncurses_CFLAGS)
842 	AC_SUBST(libncurses_LIBS)
843 else
844 	AC_SEARCH_LIBS(
845 		setupterm,
846 		found_ncurses=yes,
847 		found_ncurses=no
848 	)
849 	if test "x$found_ncurses" = xyes; then
850 		AC_CHECK_HEADER(
851 			ncurses.h,
852 			libncurses_CFLAGS="$LIBPANELW_CFLAGS $LIBPANEL_CFLAGS"
853 			libncurses_LIBS="$LIBPANELW_LIBS -lncursesw"
854 			AC_SUBST(libncurses_CFLAGS)
855 			AC_SUBST(libncurses_LIBS)
856 		)
857 	fi
858 fi
859 if test "x$found_ncurses" = xyes; then
860 	AC_DEFINE([HAVE_NCURSES_H], [1], [NCurses])
861 else
862 	# No ncurses, try curses.
863 	AC_CHECK_FUNC(
864 		setupterm,
865 		found_curses=yes,
866 		found_curses=no
867 	)
868 	AC_CHECK_HEADER(
869 		curses.h,
870 		found_curses=yes,
871 		found_curses=no)
872 	if test "x$found_curses" = xyes; then
873 		libncurses_CFLAGS="$LIBPANELW_CFLAGS $LIBPANEL_CFLAGS"
874 		libncurses_LIBS="$LIBPANELW_LIBS -lncursesw -lpanelw"
875 		AC_SUBST(libncurses_CFLAGS)
876 		AC_SUBST(libncurses_LIBS)
877 		AC_DEFINE([HAVE_CURSES_H], [1], [Curses_h])
878 	else
879 		AC_MSG_ERROR("curses not found")
880 	fi
881 fi
882 
883 # Save our CFLAGS/CPPFLAGS/LDFLAGS for the Makefile and restore the old user
884 # variables.
885 AC_SUBST(AM_CPPFLAGS)
886 CPPFLAGS="$SAVED_CPPFLAGS"
887 AC_SUBST(AM_CFLAGS)
888 CFLAGS="$SAVED_CFLAGS"
889 AC_SUBST(AM_LDFLAGS)
890 LDFLAGS="$SAVED_LDFLAGS"
891 
892 # LIBS is designed to accumulate library dependencies as checks for them are
893 # peformed, so that this can be included directly to ld(1).
894 #
895 # However, this hinders the splitting up of the library dependencies so that
896 # they're targetted just where they're needed.  Flatting LIBS here ensures
897 # that this happens appropriately.
898 LIBS=""
899 
900 AH_BOTTOM([#include "got_compat2.h"])
901 
902 AM_CONDITIONAL([CVG_ENABLED], [test "x$enable_cvg" = xyes])
903 
904 AC_CONFIG_FILES([Makefile
905 		 compat/Makefile
906 		 gitwrapper/Makefile
907 		 got/Makefile
908 		 gotadmin/Makefile
909 		 gotctl/Makefile
910 		 gotd/Makefile
911 		 gotd/libexec/Makefile
912 		 gotd/libexec/got-notify-email/Makefile
913 		 gotd/libexec/got-notify-http/Makefile
914 		 gotsh/Makefile
915 		 gotwebd/Makefile
916 		 libexec/Makefile
917 		 libexec/got-fetch-http/Makefile
918 		 libexec/got-fetch-pack/Makefile
919 		 libexec/got-index-pack/Makefile
920 		 libexec/got-read-blob/Makefile
921 		 libexec/got-read-commit/Makefile
922 		 libexec/got-read-gitconfig/Makefile
923 		 libexec/got-read-gotconfig/Makefile
924 		 libexec/got-read-object/Makefile
925 		 libexec/got-read-pack/Makefile
926 		 libexec/got-read-patch/Makefile
927 		 libexec/got-read-tag/Makefile
928 		 libexec/got-read-tree/Makefile
929 		 libexec/got-send-pack/Makefile
930 		 tog/Makefile
931 		 Makefile.common:Makefile.common.in])
932 
933 if test "x$enable_cvg" = "xyes"; then
934 	AC_CONFIG_FILES([cvg/Makefile])
935 fi
936 
937 AC_OUTPUT
938 
939 executables="$(eval echo ${exec_prefix}/bin)"
940 helpers="$(eval echo ${libexecdir})"
941 manpages="$(eval echo ${mandir})"
942 gotdep="$GOTD_EMPTY_PATHC"
943 gotgwlep="$GITWRAPPER_LIBEXEC_PATHC"
944 
945 if test -z "$enable_cvg"; then
946 	enable_cvg="no"
947 fi
948 
949 if test -z "$gotdep"; then
950 	gotdep="N/A"
951 fi
952 
953 if test -z "$gotgwlep"; then
954 	gotgwlep="N/A"
955 fi
956 
957 echo "
958 Configured got-portable with:
959 
960  Version:      $VERSION
961 
962  Prefix:           ${prefix}
963  Executables:      ${executables}
964  Bison:            $YACC
965  CFlags:           $CFLAGS
966  cvg:		   ${enable_cvg}
967  Gotd:
968    Empty Path:     ${gotdep}
969    Gitwrapper:     ${gotgwlep}
970  Helpers:          ${helpers}
971  Man pages:        ${manpages}
972 "