configure

#!/bin/sh
# Try and be like autotools configure, but without autotools

echo "configure args: $*"
exec 3>config.log

# Ensure that we do not inherit these from env
ARC4RANDOM=
CLOSEFROM=
STRLCPY=
SECCOMP=
OS=
BUILD=
HOST=
HOSTCC=
TARGET=
INCLUDEDIR=
SANITIZE=no

for x do
	opt=${x%%=*}
	var=${x#*=}
	case "$opt" in
	--os|OS) OS=$var;;
	--debug) DEBUG=$var;;
	--disable-debug) DEBUG=no;;
	--enable-debug) DEBUG=yes;;
	--prefix) PREFIX=$var;prefix=$var;; # prefix is set for autotools compat
	--sysconfdir) SYSCONFDIR=$var;;
	--bindir|--sbindir) SBINDIR=$var;;
	--libexecdir) LIBEXECDIR=$var;;
	--statedir|--localstatedir) STATEDIR=$var;;
	--rundir) RUNDIR=$var;;
	--runstatedir) RUNSTATEDIR=$var;;
	--mandir) MANDIR=$var;;
	--datadir) DATADIR=$var;;
	--with-ccopts|CFLAGS) CFLAGS=$var;;
	--disable-seccomp) SECCOMP=no;;
	--enable-seccomp) SECCOMP=yes;;
	--sanitise|--sanitize) SANITIZEADDRESS="yes";;
	--user) DHCPSD_USER=$var;;
	-I|--includedir) INCLUDEDIR="$INCLUDEDIR${INCLUDEDIR:+ }-I$var";;
	CC) CC=$var;;
	CPPFLAGS) CPPFLAGS=$var;;
	PKG_CONFIG) PKG_CONFIG=$var;;
	--build) BUILD=$var;;
	--host) HOST=$var; HOSTCC=$var-;;
	--target) TARGET=$var;;
	--libdir) LIBDIR=$var;;
	--infodir) ;; # ignore autotools
	--disable-maintainer-mode|--disable-dependency-tracking) ;;
	--disable-option-checking|--disable-silent-rules) ;;
	-V|--version)
		v=$(sed -ne 's/.*VERSION[[:space:]]*"\([^"]*\).*/\1/p' defs.h);
		c=$(sed -ne 's/^.*copyright\[\] = "\([^"]*\).*/\1/p' dhcpcd.c);
		echo "dhcpcd-$v $c";
		exit 0;;
	-h|--help) cat <<EOF
\`configure' configures this package to adapt to many kinds of systems.

Usage: configure [OPTION]... [VAR=VALUE]...

To assign environment variables (e.g., CC, CFLAGS...), specify them as
VAR=VALUE.  See below for descriptions of some of the useful variables.

Defaults for the options are specified in brackets.

Configuration:
  -h, --help              display this help and exit
      --help=short        display options specific to this package
  -V, --version           display version information and exit

Installation directories:
  --prefix=PREFIX         install architecture-independent files in PREFIX [/]

By default, \`make install' will install all the files in \'/sbin',
\`/libexec', etc. You can specify
an installation prefix other than \`/' using \`--prefix',
for instance \`--prefix=$HOME'.

For better control, use the options below.

Fine tuning of the installation directories:
  --bindir=DIR            user executables [PREFIX/bin]
  --sbindir=DIR           system admin executables [PREFIX/sbin]
  --libexecdir=DIR        program executables [PREFIX/libexec]
  --dbdir=DIR             database [STATEDIR/db/dhcpcd]
  --sysconfdir=DIR        read-only single-machine data [PREFIX/etc]
  --localstatedir=DIR     modifiable single-machine data [/var]
  --libdir=DIR            object code libraries [PREFIX/lib]
  --includedir=DIR        C header files [PREFIX/include]
  --mandir=DIR            man documentation [PREFIX/man]

System types:
  --build=BUILD           configure for building on BUILD [guessed]
  --host=HOST             build programs to run on HOST [BUILD]
  --target=TARGET         configure for building compilers for TARGET [HOST]

Optional Features:
  --disable-FEATURE       do not include FEATURE (same as --enable-FEATURE=no)
  --enable-FEATURE[=ARG]  include FEATURE [ARG=yes]

Some influential environment variables:
  CC          C compiler command
  CFLAGS      C compiler flags
  LDFLAGS     linker flags, e.g. -L<lib dir> if you have libraries in a
	      nonstandard directory <lib dir>
  CPPFLAGS    C/C++ preprocessor flags, e.g. -I<include dir> if you have
	      headers in a nonstandard directory <include dir>
  CPP         C preprocessor
  PKG_CONFIG  pkg-config executable

Use these variables to override the choices made by \`configure' or to help
it to find libraries and programs with nonstandard names/locations.
EOF
exit 0
;;
	*) echo "$0: WARNING: unknown option $opt" >&2;;
	esac
done

: ${SED:=sed}
: ${GREP:=grep}
: ${PKG_CONFIG:=pkg-config}
: ${WC:=wc}

: ${FORK:=yes}
_which()
{
	x="$(which "$1" 2>/dev/null)"
	if [ $? = 0 ] && [ -n "$x" ]; then
		echo "$x"
		return 0
	fi
	for x in /sbin/"$1" /usr/sbin/"$1" \
		/usr/pkg/sbin/"$1" /usr/local/sbin/"$1"
	do
		if [ -e "$x" ]; then
			echo "$x"
			return 0
		fi
	done
	return 1
}

CONFIG_H=config.h
CONFIG_MK=config.mk

if [ -z "$BUILD" ]; then
	# autoconf target triplet: cpu-vendor-os
	BUILD=$(uname -m)-unknown-$(uname -s | tr '[:upper:]' '[:lower:]')
fi
: ${HOST:=$BUILD}

if [ -z "$OS" ]; then
	echo "Deriving operating system from ... $HOST"
	# Derive OS from cpu-vendor-[kernel-]os
	CPU=${HOST%%-*}
	REST=${HOST#*-}
	if [ "$CPU" != "$REST" ]; then
		VENDOR=${REST%%-*}
		REST=${REST#*-}
		if [ "$VENDOR" != "$REST" ]; then
			# Use kernel if given, otherwise os
			OS=${REST%%-*}
		else
			# 2 tupple
			OS=$VENDOR
			VENDOR=
		fi
	fi

	# Work with cpu-kernel-os, ie Debian
	case "$VENDOR" in
	linux*|kfreebsd*) OS=$VENDOR; VENDOR= ;;
	esac
	case "$REST" in
	gnu/kfreebsd*)		OS="kfreebsd"; VENDOR= ;;
	esac
	# Special case
	case "$OS" in
	gnu*) OS=hurd;; # No HURD support as yet
	esac
fi

echo "Configuring dhcpcd for ... $OS"
rm -f $CONFIG_H $CONFIG_MK
echo "# $OS" >$CONFIG_MK
echo "/* $OS */" >$CONFIG_H
echo >>$CONFIG_H
echo "#ifndef CONFIG_H">>$CONFIG_H
echo "#define CONFIG_H">>$CONFIG_H
echo >>$CONFIG_H

: ${PREFIX=/usr/local}
: ${SYSCONFDIR:=$PREFIX/etc}
: ${SBINDIR:=$PREFIX/sbin}
: ${LIBDIR:=$PREFIX/lib}
: ${STATEDIR:=/var}
: ${DATADIR:=$STATEDIR/db}
: ${RUNDIR:=$STATEDIR/run}
: ${MANDIR:=${PREFIX:-/usr}/share/man}

eval SYSCONFDIR="$SYSCONFDIR"
eval LIBDIR="$LIBDIR"
eval STATEDIR="$STATEDIR"
eval DATADIR="$DATADIR"
eval RUNDIR="$RUNDIR"
eval MANDIR="$MANDIR"

CONFDIR="$SYSCONFDIR/dhcpsd"
PLUGINDIR="$LIBDIR/dhcpsd"
DBDIR="$DATADIR/dhcpsd"

for x in SYSCONFDIR SBINDIR LIBDIR DATADIR RUNDIR MANDIR \
		    CONFDIR PLUGINDIR DBDIR
do
	eval v=\$$x
	# Make files look nice for import
	l=$((10 - ${#x}))
	unset t
	[ $l -gt 3 ] && t="	"
	echo "$x=$t	$v" >>$CONFIG_MK
	unset t
	[ $l -gt 2 ] && t="	"
	echo "#define	$x$t		\"$v\"" >>$CONFIG_H
done

# Always obey CC.
if [ -n "$CC" ]; then
	HOSTCC=
else
	CC=cc
	_COMPILERS="cc clang gcc pcc icc"
fi
# Only look for a cross compiler if --host and --build are not the same
if [ -n "$HOSTCC" ] && [ "$BUILD" != "$HOST" ]; then
	for _CC in $_COMPILERS; do
		_CC=$(_which "$HOSTCC$_CC")
		if [ -x "$_CC" ]; then
			CC=$_CC
			break
		fi
	done
fi
if ! type "$CC" >/dev/null 2>&1; then
	for _CC in $_COMPILERS; do
		_CC=$(_which "$_CC")
		if [ -x "$_CC" ]; then
			CC=$_CC
			break
		fi
	done
fi

# Set to blank, then append user config
# We do this so our SED call to append to XCC remains portable
if [ -n "$CFLAGS" ]; then
	echo "CFLAGS=" >>$CONFIG_MK
	echo "CFLAGS+=	$CFLAGS" >>$CONFIG_MK
fi
if [ -n "$CPPFLAGS" ]; then
	echo "CPPFLAGS=" >>$CONFIG_MK
	echo "CPPFLAGS+=	$CPPFLAGS" >>$CONFIG_MK
fi
if [ -n "$INCLUDEDIR" ]; then
	echo "CPPFLAGS+=	$INCLUDEDIR" >>$CONFIG_MK
fi
if [ -n "$LDFLAGS" ]; then
	echo "LDFLAGS=" >>$CONFIG_MK
	echo "LDFLAGS+=	$LDFLAGS" >>$CONFIG_MK
fi

if [ -z "$DEBUG" ] && [ -d .git ]; then
	printf "Found git checkout ... "
	DEBUG=yes
fi
if [ -n "$DEBUG" ] && [ "$DEBUG" != no ] && [ "$DEBUG" != false ]; then
	echo "Adding debugging CFLAGS"

	cat <<EOF >>$CONFIG_MK
CFLAGS+=	-g -Wall -Wextra -Wundef
CFLAGS+=	-Wmissing-prototypes -Wmissing-declarations
CFLAGS+=	-Wmissing-format-attribute -Wnested-externs
CFLAGS+=	-Winline -Wcast-align -Wcast-qual -Wpointer-arith
CFLAGS+=	-Wreturn-type -Wswitch -Wshadow
CFLAGS+=	-Wcast-qual -Wwrite-strings
CFLAGS+=	-Wformat=2
CFLAGS+=	-Wpointer-sign -Wmissing-noreturn
EOF

	case "$OS" in
	mirbsd*|openbsd*|dragonfly*);; # OpenBSD has many redundant decs in system headers
	bitrig*|solaris*|sunos*)
			echo "CFLAGS+=	-Wredundant-decls" >>$CONFIG_MK
			;; # Bitrig spouts many conversion errors with htons
			   # sunos has many as well
	*)		echo "CFLAGS+=	-Wredundant-decls" >>$CONFIG_MK
			echo "CFLAGS+=	-Wconversion" >>$CONFIG_MK
			;;
	esac

	case "$OS" in
	solaris*|sunos*);;
	*)		echo "CFLAGS+=	-Wstrict-overflow" >>$CONFIG_MK;;
	esac

	# Turn on extra per compiler debugging
	case "$CC" in
	*gcc*)		echo "CFLAGS+=	-Wlogical-op" >>$CONFIG_MK;;
	esac

	if [ "$SANITIZEADDRESS" = yes ]; then
		printf "Testing compiler supports address sanitisation ... "
	cat <<EOF >_test.c
int main(void) {
	return 0;
}
EOF
		if $CC -fsanitize=address,undefined _test.c -o _test 2>&3; then
			echo "yes"
			echo "SANITIZEADDRESS=	yes" >>$CONFIG_MK
			echo "CPPFLAGS+=	-DASAN" >>$CONFIG_MK
			echo "CFLAGS+=	-fsanitize=address,undefined" >>$CONFIG_MK
			echo "CFLAGS+=	-fno-omit-frame-pointer" >>$CONFIG_MK
			echo "LDFLAGS+=	-fsanitize=address,undefined" >>$CONFIG_MK
		else
			echo "no"
		fi
		rm -rf _test.* _test
	fi
else
	echo "CPPFLAGS+=	-DNDEBUG" >>$CONFIG_MK
fi

case "$OS" in
darwin*)
	echo "LDFLAGS_SO+=	-Wl,-undefined,dynamic_lookup" >>$CONFIG_MK
	;;
freebsd*|kfreebsd*)
	# FreeBSD hide some newer POSIX APIs behind _GNU_SOURCE ...
	echo "CPPFLAGS+=	-D_GNU_SOURCE" >>$CONFIG_MK
	;;
linux*)
	echo "CPPFLAGS+=	-D_GNU_SOURCE" >>$CONFIG_MK
	# Large File Support, should be fine for 32-bit systems.
	# But if this is the case, why is it not set by default?
	echo "CPPFLAGS+=	-D_FILE_OFFSET_BITS=64" >>$CONFIG_MK
	echo "CPPFLAGS+=	-D_LARGEFILE_SOURCE" >>$CONFIG_MK
	echo "CPPFLAGS+=	-D_LARGEFILE64_SOURCE" >>$CONFIG_MK
	if [ -z "$SECCOMP" ] || [ "$SECCOMP" != no ]; then
		echo "CPPFLAGS+=	-DHAVE_SECCOMP" >>$CONFIG_MK
		echo "SRCS+=		seccomp.c" >>$CONFIG_MK
	fi
	;;
qnx*)
	echo "CPPFLAGS+=	-D__EXT" >>$CONFIG_MK
	;;
solaris*|sunos*)
	echo "CPPFLAGS+=	-D_XPG4_2 -D__EXTENSIONS__ -DBSD_COMP" \
	    >>$CONFIG_MK
	echo "LDADD+=		-ldlpi -lkstat" >>$CONFIG_MK
	;;
esac

echo "Using compiler .. $CC"
# Add CPPFLAGS and CFLAGS to CC for testing features
XCC="$CC `CPPFLAGS= $SED -n -e 's/CPPFLAGS+=*\(.*\)/\1/p' $CONFIG_MK`"
XCC="$XCC `CFLAGS= $SED -n -e 's/CFLAGS+=*\(.*\)/\1/p' $CONFIG_MK`"

# When running tests, treat all warnings as errors.
# This avoids the situation where we link to a libc symbol
# without the correct header because it might be hidden behind
# a _*_SOURCE #define guard.
XCC="$XCC -Wall -Werror"

# Now test we can use the compiler with our CFLAGS
cat <<EOF >_test.c
int main(void) {
	return 0;
}
EOF
_CC=false
if $XCC _test.c -o _test >/dev/null 2>&3; then
	[ -x _test ] && _CC=true
fi
rm -rf _test.* _test
if ! $_CC; then
	echo $XCC
	echo "$CC does not create executables" >&2
	exit 1
fi
[ "$CC" != cc ] && echo "CC=		$CC" >>$CONFIG_MK
$CC --version | $SED -e '1!d'

# Try and work out system user
if [ -z "$DHCPSD_USER" ]; then
	printf "Detecting a suitable user for dhcpsd ... "
	for x in _dhcpsd dhcpsd _dhcpd dhcpd; do
		if id "$x" >/dev/null 2>&1; then
			DHCPSD_USER="$x"
			echo "$DHCPSD_USER"
			break
		fi
	done
	if [ -z "$DHCPSD_USER" ]; then
		DHCPSD_USER=dhcpsd
		echo
		echo "No suitable user found for dhcpsd!"
	fi
else
	echo "Using $DHCPSD_USER as the user to run dhcpsd"
fi
echo "#define DHCPSD_USER		\"$DHCPSD_USER\"" >>$CONFIG_H

if [ -z "$SANDBOX" ]; then
printf "Testing for capsicum and libcasper ... "
cat <<EOF >_capsicum.c
#include <sys/capsicum.h>
#include <casper/cap_net.h>
int main(void) {
	return cap_enter();
}
EOF
if $XCC _capsicum.c -o _capsicum -lcasper -lcap_net 2>&3; then
	echo "yes"
	echo "#define	HAVE_CASPER" >>$CONFIG_H
	# Casper header files need this
	#echo "CPPFLAGS+=	-DHAVE_CASPER" >>$CONFIG_MK
	echo "LDADD+=		-lcasper -lcap_net" >>$CONFIG_MK
	SANDBOX=capsicum
else
	echo "no"
fi
	rm -rf _capsicum.* _capsicum
fi

if [ -z "$SANDBOX" ]; then
	printf "Testing for pledge ... "
	cat <<EOF >_pledge.c
#include <unistd.h>
int main(void) {
	return pledge("stdio", NULL);
}
EOF
	if $XCC _pledge.c -o _pledge 2>&3; then
		echo "yes"
		echo "#define	HAVE_PLEDGE" >>$CONFIG_H
		SANDBOX=pledge
	else
		echo "no"
	fi
	rm -rf _pledge.* _pledge
fi

abort=false
# We require the libc to support non standard functions, like getifaddrs
printf "Testing for getifaddrs ... "
cat <<EOF >_getifaddrs.c
#include <sys/types.h>
#include <ifaddrs.h>
int main(void) {
	struct ifaddrs *ifap;
	return getifaddrs(&ifap);
}
EOF
LIBSOCKET=
if $XCC _getifaddrs.c -o _getifaddrs 2>&3; then
	echo "yes"
elif $XCC _getifaddrs.c -o _getifaddrs -lsocket 2>&3; then
	LIBSOCKET=-lsocket
	echo "yes (-lsocket)"
	echo "LDADD+=		-lsocket" >>$CONFIG_MK
else
	echo "no"
	echo "libc support for getifaddrs is required - aborting" >&2
	abort=true
fi
rm -rf _getifaddrs.* _getifaddrs
$abort && exit 1

printf "Testing for clock_gettime ... "
cat <<EOF >_clock_gettime.c
#include <time.h>
int main(void) {
	struct timespec ts;
	return clock_gettime(CLOCK_MONOTONIC, &ts);
}
EOF
if $XCC _clock_gettime.c -o _clock_gettime 2>&3; then
	echo "yes"
elif $XCC _clock_gettime.c -lrt -o _clock_gettime 2>&3; then
	echo "yes (-lrt)"
	echo "LDADD+=		-lrt" >>$CONFIG_MK
else
	echo "no"
	echo "libc support for clock_getttime is required - aborting" >&2
	abort=true
fi
rm -rf _clock_gettime.* _clock_gettime
$abort && exit 1

if [ -z "$ARC4RANDOM" ]; then
	printf "Testing for arc4random ... "
	cat <<EOF >_arc4random.c
#include <stdlib.h>
int main(void) {
	return (int)arc4random();
}
EOF
	if $XCC _arc4random.c -o _arc4random 2>&3; then
		ARC4RANDOM=yes
	else
		ARC4RANDOM=no
	fi
	echo "$ARC4RANDOM"
	rm -rf _arc4random.* _arc4random
fi
if [ "$ARC4RANDOM" = no ]; then
	echo "COMPAT_SRCS+=	compat/arc4random.c" >>$CONFIG_MK
	echo "#include			\"compat/arc4random.h\"" >>$CONFIG_H
fi

if [ -z "$CLOSEFROM" ]; then
	printf "Testing for closefrom ... "
	cat <<EOF >_closefrom.c
#include <stdlib.h>
#include <unistd.h>
int main(void) {
	closefrom(3);
	return 0;
}
EOF
	if $XCC _closefrom.c -o _closefrom 2>&3; then
		CLOSEFROM=yes
	else
		CLOSEFROM=no
	fi
	echo "$CLOSEFROM"
fi
rm -rf _closefrom.* _closefrom
if [ "$CLOSEFROM" = no ]; then
	echo "COMPAT_SRCS+=	compat/closefrom.c" >>$CONFIG_MK
	echo "#include			\"compat/closefrom.h\"" >>$CONFIG_H
fi

printf "Testing ioctl request type ... "
cat <<EOF >_ioctl.c
#include <sys/ioctl.h>
int main(void) {
	unsigned long req = 0;
	return ioctl(3, req, &req);
}
EOF
if $XCC _ioctl.c -o _ioctl 2>&3; then
	IOCTL_REQ="unsigned long"
else
	IOCTL_REQ="int"
fi
echo "$IOCTL_REQ"
# Our default is unsigned long
# We can still define it, but it makes the code path slightly bigger
if [ "$IOCTL_REQ" != "unsigned long" ]; then
	echo "#define	IOCTL_REQUEST_TYPE	$IOCTL_REQ" >>$CONFIG_H
fi
rm -rf _ioctl.* _ioctl

printf "Testing for inet_ntoa ... "
cat <<EOF >_inet_ntoa.c
#include <netinet/in.h>
#include <arpa/inet.h>
int main(void) {
	struct in_addr in = { .s_addr = 0 };
	inet_ntoa(in);
	return 0;
}
EOF
if $XCC _inet_ntoa.c -o _inet_ntoa 2>&3; then
	echo "yes"
elif $XCC _inet_ntoa.c -lnsl -o _inet_ntoa 2>&3; then
	echo "yes (-lnsl)"
	echo "LDADD+=		-lnsl" >>$CONFIG_MK
elif $XCC _inet_ntoa.c -lsocket -o _inet_ntoa 2>&3; then
	echo "yes (-lsocket)"
	echo "LDADD+=		-lsocket" >>$CONFIG_MK
else
	echo "no"
	echo "libc support for inet_ntoa is required - aborting" >&2
	abort=true
fi
rm -rf _inet_ntoa.* _inet_ntoa
$abort && exit 1

if [ -z "$LINK_SRC" ]; then
	printf "Testing for route ... "
	cat << EOF >_route.c
#include <sys/socket.h>
#include <sys/types.h>
#include <net/route.h>
int main(void) {
	struct rt_msghdr rtm = { .rtm_type = RTM_IFINFO };
	return (int)rtm.rtm_type;
}
EOF
	if $XCC _route.c -o _route 2>&3; then
		LINK_SRC="route.c"
		echo "yes"
	else
		echo "no"
	fi
	rm -rf _route.* _route
fi

if [ -z "$LINK_SRC" ]; then
	printf "Testing for netlink ... "
	cat << EOF >_netlink.c
#include <linux/netlink.h>
#include <linux/rtnetlink.h>
#include <sys/socket.h>
int main(void) {
	return 0;
}
EOF
	if $XCC _netlink.c -o _netlink 2>&3; then
		LINK_SRC="netlink.c"
		echo "yes"
	else
		echo "no"
	fi
	rm -rf _netlink.* _netlink
fi
if [ -z "$LINK_SRC" ]; then
	echo "no mechanism for detecting interface departures found" >&2
	exit 1
fi
echo "LINK_SRC=	$LINK_SRC" >>$CONFIG_MK

if [ -z "$SETPROCTITLE" ]; then
	printf "Testing for setproctitle ... "
	cat << EOF >_setproctitle.c
#include <stdlib.h>
#include <unistd.h>
int main(void) {
	setproctitle("foo");
	return 0;
}
EOF
	if $XCC _setproctitle.c -o _setproctitle 2>&3; then
		SETPROCTITLE=yes
	else
		SETPROCTITLE=no
	fi
	echo "$SETPROCTITLE"
	rm -rf _setproctitle.* _setproctitle
fi
if [ "$SETPROCTITLE" != no ]; then
	echo "#define HAVE_SETPROCTITLE" >>$CONFIG_H
fi

if [ -z "$STRLCPY" ]; then
	printf "Testing for strlcpy ... "
	cat <<EOF >_strlcpy.c
#include <string.h>
int main(void) {
	const char s1[] = "foo";
	char s2[10];
	return (int)strlcpy(s2, s1, sizeof(s2));
}
EOF
	if $XCC _strlcpy.c -o _strlcpy 2>&3; then
		STRLCPY=yes
	else
		STRLCPY=no
	fi
	echo "$STRLCPY"
	rm -rf _strlcpy.* _strlcpy
fi
if [ "$STRLCPY" = no ]; then
	echo "COMPAT_SRCS+=	compat/strlcpy.c" >>$CONFIG_MK
	echo "#include			\"compat/strlcpy.h\"" >>$CONFIG_H
fi

if [ -z "$RBTREE" ]; then
	printf "Testing for rb_tree_init ... "
	cat <<EOF >_rbtree.c
#include <sys/rbtree.h>
static rb_tree_ops_t ops;
int main(void) {
	rb_tree_t tree;
	rb_tree_init(&tree, &ops);
	return 0;
}
EOF
	if $XCC _rbtree.c -o _rbtree 2>&3; then
		RBTREE=yes
	else
		RBTREE=no
	fi
	echo "$RBTREE"
	rm -rf _rbtree.* _rbtree
fi
if [ "$RBTREE" = no ]; then
	echo "VENDOR_SRCS+=	vendor/rbtree.c" >>$CONFIG_MK
	# Tell rbtree.c to #include "rbtree.h" rather than sys/rbtree.h
	echo "RBTREE_CPPFLAGS+=	-DRBLOCAL" >>$CONFIG_MK
	# Remove unused warning from compile
	echo "RBTREE_CPPFLAGS+=	\"-D__unused=__attribute__((__unused__))\"" >>$CONFIG_MK
	# Enjoy the same optimisation as NetBSD's libc
	echo "RBTREE_CPPFLAGS+=	\"-D__predict_false(exp)=__builtin_expect((exp) ? 1 : 0, 0)\"" >>$CONFIG_MK
else
	echo "#define	HAVE_SYS_RBTREE_H" >>$CONFIG_H
fi

if [ -z "$REALLOCARRAY" ]; then
	printf "Testing for reallocarray ... "
	cat <<EOF >_reallocarray.c
#include <stdlib.h>

int main(void) {
	void *foo = reallocarray(NULL, 0, 0);
	return foo == NULL ? 1 : 0;
}
EOF
	if $XCC _reallocarray.c -o _reallocarray 2>&3; then
		REALLOCARRAY=yes
	else
		REALLOCARRAY=no
	fi
	echo "$REALLOCARRAY"
	rm -rf _reallocarray.* _reallocarray
fi
if [ "$REALLOCARRAY" = no ]; then
	echo "COMPAT_SRCS+=	compat/reallocarray.c" >>$CONFIG_MK
	echo "#include			\"compat/reallocarray.h\"">>$CONFIG_H
fi
# Set this for eloop
echo "#define	HAVE_REALLOCARRAY" >>$CONFIG_H

if [ "$LUA" != no ]; then
	printf "Checking for lua ... "
	for LUA_VERSION in lua-5.4 lua54 lua; do
		LUA_CFLAGS=$("$PKG_CONFIG" --cflags "$LUA_VERSION" 2>&3)
		LUA_LIBS=$("$PKG_CONFIG" --libs "$LUA_VERSION" 2>&3)
		if [ -n "$LUA_LIBS" ]; then
			echo "$LUA_VERSION"
			echo "LUA_CFLAGS=	$LUA_CFLAGS" >>$CONFIG_MK
			echo "LUA_LIBS=	$LUA_LIBS" >>$CONFIG_MK
			break
		fi
	done
	if [ -n "$LUA_LIBS" ]; then
		echo "LUA_PLUGIN=	lua" >>$CONFIG_MK
		echo "LUA_MAN8+=	dhcpsd_lua.8" >>$CONFIG_MK
	else
		echo "not found"
	fi

	if [ -n "$LUA_CFLAGS" ]; then
		echo "If:" >.clangd
		echo "  PathMatch: src/plugins/lua.c" >>.clangd
		echo "CompileFlags:" >>.clangd
		echo "  Add: [-I.., -I../.., $LUA_CFLAGS]" >>.clangd
	fi
fi

echo >>$CONFIG_H
echo "#endif /*CONFIG_H*/">>$CONFIG_H

cat <<EOF >>.clangd
---
If:
  PathMatch: src/plugins/.*\.c
CompileFlags:
  Add: [-I.., -I../.., -I../../vendor]
---
If:
  PathMatch: src/.*\.c
CompileFlags:
  Add: [-I.., -I../vendor]
EOF

echo
echo "   SYSCONFDIR =		$SYSCONFDIR"
echo "   SBINDIR =		$SBINDIR"
echo "   LIBDIR =		$LIBDIR"
echo "   DATADIR =		$DATADIR"
echo "   RUNDIR =		$RUNDIR"
echo "   MANDIR =		$MANDIR"
echo "   DHCPSD_USER =	$DHCPSD_USER"
echo