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AC_INIT([telescope], [0.7.1-current], [telescope@omarpolo.com], [telescope], [gemini://telescope.omarpolo.com])
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AC_CONFIG_AUX_DIR(etc)
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AC_CONFIG_LIBOBJ_DIR(compat)
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AC_CANONICAL_HOST
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AM_INIT_AUTOMAKE([-Wall foreign subdir-objects])
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AC_PROG_CC_C99
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AC_USE_SYSTEM_EXTENSIONS
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AC_PROG_YACC
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PKG_PROG_PKG_CONFIG
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AC_ARG_VAR(HOSTCC, [The C compiler on the host.])
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AC_ARG_VAR(HOSTCFLAGS, [CFLAGS for the host compiler])
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test -z "${HOSTCC}"     && HOSTCC='$(CC)'
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test -z "${HOSTCFLAGS}" && HOSTCFLAGS='$(CFLAGS)'
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AC_ARG_WITH([libimsg],
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	AS_HELP_STRING([--with-libimsg],
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		[Build with imsg-compat library (default: disabled)]))
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AC_ARG_WITH([libbsd],
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	AS_HELP_STRING([--with-libbsd],
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		[Build with libbsd library (default: disabled)]))
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AS_IF([test "x$with_libbsd" = "xyes"], [
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	PKG_CHECK_MODULES([libbsd], [libbsd-overlay libbsd-ctor], [
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		CFLAGS="$libbsd_CFLAGS $CFLAGS"
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		LIBS="$libbsd_LIBS $LIBS"
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	])
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])
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AC_REPLACE_FUNCS([
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	asprintf \
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	err \
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	explicit_bzero \
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	freezero \
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	getdtablecount \
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	getdtablesize \
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	getprogname \
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	memmem \
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	recallocarray \
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	strcasestr \
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	strlcat \
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	strlcpy \
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	strsep \
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	strtonum \
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	setproctitle \
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])
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AC_MSG_CHECKING([for sys/queue.h with TAILQ_FOREACH_SAFE])
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AC_COMPILE_IFELSE([AC_LANG_PROGRAM([
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#include <sys/queue.h>
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#include <stddef.h>
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], [
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	TAILQ_HEAD(tailhead, entry) head;
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	struct entry {
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		TAILQ_ENTRY(entry) entries;
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	} *np, *nt;
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	TAILQ_INIT(&head);
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	TAILQ_FOREACH_SAFE(np, &head, entries, nt) {
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		/* nop */ ;
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	}
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	return 0;
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])], [
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	AC_MSG_RESULT(yes)
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	AC_DEFINE([HAVE_QUEUE_H], 1, [QUEUE_H])
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], AC_MSG_RESULT(no))
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AC_CHECK_DECL(PR_SET_NAME, AC_DEFINE([HAVE_PR_SET_NAME], 1, [pr_set_name]), [],
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	[[#include <sys/prctl.h>]])
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AC_SEARCH_LIBS([initscr], [ncursesw ncurses], [], [
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	AC_MSG_ERROR([requires either ncursesw or ncurses library])
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])
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AC_SEARCH_LIBS([keyname], [ncursesw ncurses tinfow tinfo], [], [
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	AC_MSG_ERROR([requires either ncursesw or ncurses library with terminfo support])
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])
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AC_CHECK_LIB(tls, tls_init, [], [
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	AC_MSG_ERROR([requires libtls])
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])
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case "$host_os" in
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	*openbsd*)
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		AC_CHECK_LIB([event], [event_init], [],
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			[AC_MSG_ERROR([requires libevent])])
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		;;
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	*)
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		PKG_CHECK_MODULES([libevent2], [libevent_core >= 2], [
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			AC_DEFINE([HAVE_EVENT2], 1, [1 if using event2])
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			CFLAGS="$libevent2_CFLAGS $CFLAGS"
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			LIBS="$libevent2_LIBS $LIBS"
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		], [AC_MSG_ERROR([requires libevent])])
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		;;
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esac
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AS_IF([test "x$with_libimsg" = "xyes"], [
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	PKG_CHECK_MODULES([libimsg], [libimsg], [
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		CFLAGS="$libimsg_CFLAGS $CFLAGS"
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		LIBS="$libimsg_LIBS $LIBS"
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	])
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])
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AC_SEARCH_LIBS([imsg_init], [util], [
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		AC_DEFINE([HAVE_IMSG], 1,
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			[Define to 1 if you have imsg functions (-lutil or -limsg).])
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	], [
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		AC_LIBOBJ(imsg)
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		AC_LIBOBJ(imsg-buffer)
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	]
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)
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AC_CHECK_LIB(util, ohash_init, [], [
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	AC_LIBOBJ(ohash)
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	AC_LIBOBJ(fmt_scaled)
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])
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AC_CHECK_FUNCS([asr_run])
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# don't check for landlock: it currently unusable.
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dnl AC_CHECK_HEADERS([linux/landlock.h])
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# check compiler flags
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AC_DEFUN([CC_ADD_CHECK_FLAGS], [
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	AC_MSG_CHECKING([if $CC supports $1 flag])
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	old_CFLAGS="$CFLAGS"
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	CFLAGS="$CFLAGS $1"
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	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[])],
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		AC_MSG_RESULT(yes),
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		AC_MSG_RESULT(no)
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		CFLAGS="$old_CFLAGS")
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])
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CC_ADD_CHECK_FLAGS([-Wall])
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CC_ADD_CHECK_FLAGS([-Wextra])
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CC_ADD_CHECK_FLAGS([-Wmissing-declarations])
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CC_ADD_CHECK_FLAGS([-Wmissing-prototypes])
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CC_ADD_CHECK_FLAGS([-Wstrict-prototypes])
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CC_ADD_CHECK_FLAGS([-Wwrite-strings])
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CC_ADD_CHECK_FLAGS([-Wno-unused-parameter])
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CC_ADD_CHECK_FLAGS([-Wpointer-arith])
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CC_ADD_CHECK_FLAGS([-Wsign-compare])
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CC_ADD_CHECK_FLAGS([-Wcast-align])
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AC_CONFIG_HEADERS([config.h])
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AC_CONFIG_FILES([
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	Makefile
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	test/Makefile
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	pages/about_about.gmi
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	pages/about_blank.gmi
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	pages/about_crash.gmi
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	pages/about_help.gmi
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	pages/about_license.gmi
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	pages/about_new.gmi
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	pages/bookmarks.gmi
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])
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AC_OUTPUT