dhcpcd/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
HOOKSET=false
INET=
INET6=
ARC4RANDOM=
CLOSEFROM=
GETLINE=
STRLCPY=
UDEV=
OS=
BUILD=
HOST=
HOSTCC=
TARGET=
DEBUG=
FORK=
STATIC=
DEVS=
EMBEDDED=
POLL=

for x do
	opt=${x%%=*}
	var=${x#*=}
	case "$opt" in
	--os|OS) OS=$var;;
	--debug) DEBUG=$var;;
	--disable-debug) DEBUG=no;;
	--enable-debug) DEBUG=yes;;
	--fork) FORK=$var;;
	--disable-fork) FORK=no;;
	--enable-fork) FORK=yes;;
	--disable-static) STATIC=no;;
	--enable-static) STATIC=yes;;
	--disable-ipv4) INET=no;;
	--enable-ipv4) INET=yes;;
	--disable-ipv6) INET6=no;;
	--enable-ipv6) INET6=yes;;
	--disable-embedded) EMBEDDED=no;;
	--enable-embedded) EMBEDDED=yes;;
	--prefix) PREFIX=$var;;
	--sysconfdir) SYSCONFDIR=$var;;
	--bindir|--sbindir) SBINDIR=$var;;
	--libexecdir) LIBEXECDIR=$var;;
	--statedir|--localstatedir) STATEDIR=$var;;
	--dbdir) DBDIR=$var;;
	--rundir) RUNDIR=$var;;
	--mandir) MANDIR=$var;;
	--datadir) DATADIR=$var;;
	--with-ccopts|CFLAGS) CFLAGS=$var;;
	CC) CC=$var;;
	CPPFLAGS) CPPFLAGS=$var;;
	--with-hook) HOOKSCRIPTS="$HOOKSCRIPTS${HOOKSCRIPTS:+ }$var";;
	--with-hooks|HOOKSCRIPTS) HOOKSCRIPTS=$var; HOOKSET=true;;
	--build) BUILD=$var;;
	--host) HOST=$var; HOSTCC=$var-;;
	--target) TARGET=$var;;
	--libdir) LIBDIR=$var;;
	--without-arc4random) ARC4RANDOM=no;;
	--without-closefrom) CLOSEFROM=no;;
	--without-getline) GETLINE=no;;
	--without-strlcpy) STRLCPY=no;;
	--with-printf_m) HAVE_PRINTF_M=yes;;
	--without-printf_m) HAVE_PRINTF_M=no;;
        --without-posix_spawn) POSIX_SPAWN=no;;
	--without-md5) MD5=no;;
	--without-sha2) SHA2=no;;
	--without-sha256) SHA2=no;;
	--without-dev) DEV=no;;
	--without-udev) UDEV=no;;
	--with-poll) POLL="$var";;
	--serviceexists) SERVICEEXISTS=$var;;
	--servicecmd) SERVICECMD=$var;;
	--servicestatus) SERVICESTATUS=$var;;
	--infodir|--includedir) ;; # ignore autotools
	--disable-maintainer-mode|--disable-dependency-tracking) ;;
	--disable-silent-rules) ;;
	-V|--version)
		v=$(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]
  --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

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}
: ${WC:=wc}

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

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

_which()
{
	x="$(which "$1" 2>/dev/null)"
	if [ -n "$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 "CPPFLAGS+=	-DHAVE_CONFIG_H" >>$CONFIG_MK
echo "/* $OS */" >$CONFIG_H

for x in SYSCONFDIR SBINDIR LIBDIR LIBEXECDIR DBDIR RUNDIR; 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
echo "LIBDIR=		$LIBDIR" >>$CONFIG_MK
echo "MANDIR=		$MANDIR" >>$CONFIG_MK
echo "DATADIR=	$DATADIR" >>$CONFIG_MK

# 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" -a "$BUILD" != "$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 "$LDFLAGS" ]; then
	echo "LDFLAGS=" >>$CONFIG_MK
	echo "LDFLAGS+=	$LDFLAGS" >>$CONFIG_MK
fi

# NetBSD: Even if we build for $PREFIX, the clueless user might move us to /
LDELF=/libexec/ld.elf_so
if [ -e "$LDELF" ]; then
	echo "Linking against $LDELF"
	echo "LDFLAGS+=	-Wl,-dynamic-linker=$LDELF" >>$CONFIG_MK
	echo "LDFLAGS+=	-Wl,-rpath=${LIBDIR}" >>$CONFIG_MK
fi

if [ -z "$PREFIX" -o "$PREFIX" = / ]; then
	ALLOW_USR_LIBS=false
else
	ALLOW_USR_LIBS=true
fi
case "$OS" in
linux*|sunos*|kfreebsd*) ;;
*)
	# There might be more than one ...
	for LDELFN in /libexec/ld-elf.so.[0-9]*; do
		[ -x "$LDELFN" ] && break
	done
	if ! [ -x "$LDELF" -o -x "$LDELFN" ] && \
	    [ -z "$PREFIX" -o "$PREFIX" = "/" ]
	then
		echo "Forcing a static build for $OS and \$PREFIX of /"
		STATIC=yes
		ALLOW_USR_LIBS=true
	fi
	;;
esac
if [ "$STATIC" = yes ]; then
	echo "LDFLAGS+=	-static" >>$CONFIG_MK
fi

if [ -z "$DEBUG" -a -f .fslckout ]; then
	printf "Found fossil checkout ... "
	DEBUG=yes
fi
if [ -n "$DEBUG" -a "$DEBUG" != no -a "$DEBUG" != false ]; then
	echo "Adding debugging CFLAGS"
	cat <<EOF >>$CONFIG_MK
CFLAGS+=	-g -Wall -Wextra
CFLAGS+=	-Wmissing-prototypes -Wmissing-declarations
CFLAGS+=	-Wmissing-format-attribute -Wnested-externs
CFLAGS+=	-Winline -Wcast-align -Wcast-qual -Wpointer-arith
CFLAGS+=	-Wreturn-type -Wswitch -Wshadow
CFLAGS+=	-Wcast-qual -Wwrite-strings
CFLAGS+=	-Wformat=2
CFLAGS+=	-Wpointer-sign -Wmissing-noreturn
EOF
	case "$OS" in
	mirbsd*|openbsd*);; # OpenBSD has many redundant decs in system headers
	bitrig*)	echo "CFLAGS+=	-Wredundant-decls" >>$CONFIG_MK
			;; # Bitrig spouts many conversion errors with htons
	*)		echo "CFLAGS+=	-Wredundant-decls" >>$CONFIG_MK
			echo "CFLAGS+=	-Wconversion" >>$CONFIG_MK
			;;
	esac

	case "$OS" in
	sunos*);;
	*)		echo "CFLAGS+=	-Wstrict-overflow" >>$CONFIG_MK;;
	esac
else
	echo "CPPFLAGS+=	-DNDEBUG" >>$CONFIG_MK
fi

if [ -z "$EMBEDDED" -o "$EMBEDDED" = yes ]; then
	echo "dhcpcd-definitions.conf will be embedded in dhcpcd itself"
	echo "DHCPCD_SRCS+=	dhcpcd-embedded.c" >>$CONFIG_MK
else
	echo "dhcpcd-definitions.conf will be installed to $LIBEXECDIR"
	echo "CFLAGS+= -DEMBEDDED_CONFIG=\\\"$LIBEXECDIR/dhcpcd-definitions.conf\\\"" >>$CONFIG_MK
	echo "EMBEDDEDINSTALL=	_embeddedinstall" >>$CONFIG_MK
fi

if [ -n "$FORK" -a "$FORK" != yes -a "$FORK" != true ]; then
	echo "There is no fork"
	echo "CPPFLAGS+=	-DTHERE_IS_NO_FORK" >>$CONFIG_MK
fi

case "$OS" in
freebsd*|kfreebsd*)
	# FreeBSD hide some newer POSIX APIs behind _GNU_SOURCE ...
	echo "CPPFLAGS+=	-D_GNU_SOURCE" >>$CONFIG_MK
	case "$OS" in
	kfreebsd*)	echo "CPPFLAGS+=	-DBSD" >>$CONFIG_MK;;
	esac
	echo "DHCPCD_SRCS+=	if-bsd.c" >>$CONFIG_MK
	# Whacky includes needed to buck the trend
	case "$OS" in
	kfreebsd*)	echo "#include		<inttypes.h>" >>$CONFIG_H;
	esac
	echo "#include		<net/if.h>" >>$CONFIG_H
	echo "#include		<net/if_var.h>" >>$CONFIG_H
	;;
linux*)
	echo "CPPFLAGS+=	-D_GNU_SOURCE" >>$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" >>$CONFIG_MK
	echo "DHCPCD_SRCS+=	if-linux.c" >>$CONFIG_MK
	# for RTM_NEWADDR and friends
	echo "#include		<asm/types.h> /* fix broken headers */" >>$CONFIG_H
	echo "#include		<sys/socket.h> /* fix broken headers */" >>$CONFIG_H
	echo "#include		<linux/rtnetlink.h>" >>$CONFIG_H
	;;
qnx*)
	echo "CPPFLAGS+=	-D__EXT" >>$CONFIG_MK
	echo "DHCPCD_SRCS+=	if-bsd.c" >>$CONFIG_MK
	;;
sunos*)
	echo "WARNING!!! Solaris support is at early development stage!" >&2
	echo "so don't expect it to work just yet, patches welcome" >&2
	echo "CPPFLAGS+=	-D_XPG4_2 -D__EXTENSIONS__ -DBSD_COMP" \
	    >>$CONFIG_MK
	echo "DHCPCD_SRCS+=	if-sun.c" >>$CONFIG_MK

	# IPv6 won't work, but it will at least compile.
	echo "CPPFLAGS+=	-DIN6_IFF_DETACHED=0" >>$CONFIG_MK
	echo "CPPFLAGS+=	-DIN6_IFF_TENTATIVE=0" >>$CONFIG_MK
	echo "CPPFLAGS+=	-DIN6_IFF_DUPLICATED=0" >>$CONFIG_MK
	;;
*)
	echo "DHCPCD_SRCS+=	if-bsd.c" >>$CONFIG_MK
	;;
esac

if [ -z "$INET" -o "$INET" = yes ]; then
	echo "CPPFLAGS+=	-DINET" >>$CONFIG_MK
	echo "DHCPCD_SRCS+=	arp.c dhcp.c ipv4.c ipv4ll.c" >>$CONFIG_MK
fi
if [ -z "$INET6" -o "$INET6" = yes ]; then
	echo "CPPFLAGS+=	-DINET6" >>$CONFIG_MK
	echo "DHCPCD_SRCS+=	ipv6.c ipv6nd.c dhcp6.c" >>$CONFIG_MK
fi

echo "Using compiler .. $CC"
# Add CPPFLAGS and CFLAGS to CC for testing features
XCC="$CC `$SED -n -e 's/CPPFLAGS+=*\(.*\)/\1/p' $CONFIG_MK`"
XCC="$XCC `$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 -f _test.c _test
if ! $_CC; then
	echo "$CC does not create executables" >&2
	exit 1
fi
[ "$CC" != cc ] && echo "CC=	$CC" >>$CONFIG_MK
$CC --version | $SED -e '1!d'

if [ "$OS" = linux ]; then
	printf "Testing for nl80211 ... "
	cat <<EOF >_nl80211.c
#include <linux/nl80211.h>
int main(void) {
	return 0;
}
EOF
	if $XCC _nl80211.c -o _nl80211 2>&3; then
		echo "yes"
		echo "#define HAVE_NL80211_H" >>$CONFIG_H
	else
		echo "no"
	fi
	rm -f _nl80211.c _nl80211

	# Even though we have nl80211, we only use it as a fallback
	# because it's currently possible to configure a kernel
	# where the SSID associated to won't be reported by nl80211
	# but will be via WEXT.
	echo "DHCPCD_SRCS+=	if-linux-wext.c" >>$CONFIG_MK

	printf "Testing for IN6_ADDR_GEN_MODE_NONE ... "
	cat <<EOF >_IN6_ADDR_GEN_MODE_NONE.c
#include <linux/if_link.h>
int main(void) {
	int x = IN6_ADDR_GEN_MODE_NONE;
	return x;
}
EOF
	if $XCC _IN6_ADDR_GEN_MODE_NONE.c -o _IN6_ADDR_GEN_MODE_NONE 2>&3; then
		echo "yes"
		echo "#define HAVE_IN6_ADDR_GEN_MODE_NONE" >>$CONFIG_H
	else
		echo "no"
	fi
	rm -f _IN6_ADDR_GEN_MODE_NONE.c _IN6_ADDR_GEN_MODE_NONE

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
if $XCC _getifaddrs.c -o _getifaddrs 2>&3; then
	echo "yes"
elif $XCC _getifaddrs.c -o _getifaddrs -lsocket 2>&3; then
	echo "yes (-lsocket)"
	echo "LDADD+=		-lsocket" >>$CONFIG_MK
else
	echo "no"
	echo "libc support for getifaddrs is required - aborting" >&2
	abort=true
fi
rm -f _getifaddrs.c _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 -f _clock_gettime.c _clock_gettime
$abort && exit 1

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 -f _inet_ntoa.c _inet_ntoa
$abort && exit 1

if [ -z "$ARC4RANDOM" ]; then
	printf "Testing for arc4random ... "
	cat <<EOF >_arc4random.c
#include <stdlib.h>
int main(void) {
	arc4random();
	return 0;
}
EOF
	if $XCC _arc4random.c -o _arc4random 2>&3; then
		ARC4RANDOM=yes
	else
		ARC4RANDOM=no
	fi
	echo "$ARC4RANDOM"
	rm -f _arc4random.c _arc4random
fi
if [ "$ARC4RANDOM" = no ]; then
	echo "COMPAT_SRCS+=	compat/arc4random.c" >>$CONFIG_MK
	echo "#include		\"compat/arc4random.h\"" >>$CONFIG_H
fi

if [ -z "$ARC4RANDOM_UNIFORM" ]; then
	printf "Testing for arc4random_uniform ... "
	cat <<EOF >_arc4random_uniform.c
#include <stdlib.h>
int main(void) {
	arc4random_uniform(100);
	return 0;
}
EOF
	if $XCC _arc4random_uniform.c -o _arc4random_uniform 2>&3; then
		ARC4RANDOM_UNIFORM=yes
	else
		ARC4RANDOM_UNIFORM=no
	fi
	echo "$ARC4RANDOM"
	rm -f _arc4random_uniform.c _arc4random_uniform
fi
if [ "$ARC4RANDOM_UNIFORM" = no ]; then
	echo "COMPAT_SRCS+=	compat/arc4random_uniform.c" >>$CONFIG_MK
	echo "#include		\"compat/arc4random_uniform.h\"" >>$CONFIG_H
fi

if [ -z "$CLOSEFROM" ]; then
	printf "Testing for closefrom ... "
	cat <<EOF >_closefrom.c
#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"
	rm -f _closefrom.c _closefrom
fi
if [ "$CLOSEFROM" = no ]; then
	echo "COMPAT_SRCS+=	compat/closefrom.c" >>$CONFIG_MK
	echo "#include		\"compat/closefrom.h\"" >>$CONFIG_H
fi

if [ -z "$GETLINE" ]; then
	printf "Testing for getline ... "
	cat <<EOF >_getline.c
#include <stdio.h>
int main(void) {
	char *buf = NULL;
	size_t n = 0;
	getline(&buf, &n, stdin);
	return 0;
}
EOF
	if $XCC _getline.c -o _getline 2>&3; then
		GETLINE=yes
	else
		GETLINE=no
	fi
	echo "$GETLINE"
	rm -f _getline.c _getline
fi
if [ "$GETLINE" = no ]; then
	echo "COMPAT_SRCS+=	compat/getline.c" >>$CONFIG_MK
	echo "#include		\"compat/getline.h\"" >>$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];
	strlcpy(s2, s1, sizeof(s2));
	return 0;
}
EOF
	if $XCC _strlcpy.c -o _strlcpy 2>&3; then
		STRLCPY=yes
	else
		STRLCPY=no
	fi
	echo "$STRLCPY"
	rm -f _strlcpy.c _strlcpy
fi
if [ "$STRLCPY" = no ]; then
	echo "COMPAT_SRCS+=	compat/strlcpy.c" >>$CONFIG_MK
	echo "#include		\"compat/strlcpy.h\"" >>$CONFIG_H
fi

if [ -z "$STRTOI" ]; then
	printf "Testing for strtoi ... "
	cat <<EOF >_strtoi.c
#include <stdlib.h>
#include <limits.h>
#include <inttypes.h>
int main(void) {
	int e;
	strtoi("1234", NULL, 0, 0, INT32_MAX, &e);
	return 0;
}
EOF
	if $XCC _strtoi.c -o _strtoi 2>&3; then
		STRTOI=yes
	else
		STRTOI=no
	fi
	echo "$STRTOI"
	rm -f _strtoi.c _strtoi
fi
if [ "$STRTOI" = no ]; then
	echo "COMPAT_SRCS+=	compat/strtoi.c" >>$CONFIG_MK
	echo "#include		\"compat/strtoi.h\"" >>$CONFIG_H
fi

if [ -z "$DPRINTF" ]; then
	printf "Testing for dprintf ... "
	cat <<EOF >_dprintf.c
#include <stdio.h>
int main(void) {
	return dprintf(0, "%d", 0);
}
EOF
	if $XCC _dprintf.c -o _dprintf 2>&3; then
		DPRINTF=yes
	else
		DPRINTF=no
	fi
	echo "$DPRINTF"
	rm -f _dprintf.c _dprintf
fi
if [ "$DPRINTF" = no ]; then
	echo "COMPAT_SRCS+=	compat/dprintf.c" >>$CONFIG_MK
	echo "#include		\"compat/dprintf.h\"" >>$CONFIG_H
fi

if [ -z "$HAVE_PRINTF_M" ]; then
	printf "Testing for printf %%m support ..."
	cat <<EOF >_printf_m.c
#include <sys/param.h>
#include <stdio.h>
#ifdef __GLIBC__
/* glibc has always had it */
#elif defined(__UCLIBC_HAS_PRINTF_M_SPEC__)
/* test uClibc */
#else
/* If you're using musl libc (or any other libc with printf %m support),
 * you'll have to pass --with-printf_m to configure to shrink the binary
 * size. */
#error libc does not support printf %m
#endif
int main(void) {
	return printf("%m\n");
}
EOF
	if $XCC _printf_m.c -o _printf_m 2>&3; then
		HAVE_PRINTF_M=yes
	else
		HAVE_PRINTF_M=no
	fi
	echo "$HAVE_PRINTF_M"
	rm -f _printf_m.c _printf_m
fi
if [ "$HAVE_PRINTF_M" = yes ]; then
	echo "#define HAVE_PRINTF_M" >>$CONFIG_H
fi

if [ -z "$TAILQ_FOREACH_SAFE" ]; then
	printf "Testing for TAILQ_FOREACH_SAFE ... "
	cat <<EOF >_queue.c
#include <sys/queue.h>
int main(void) {
#ifndef TAILQ_FOREACH_SAFE
#error TAILQ_FOREACH_SAFE
#endif
	return 0;
}
EOF
	if $XCC _queue.c -o _queue 2>&3; then
		TAILQ_FOREACH_SAFE=yes
		TAILQ_FOREACH=yes
	else
		TAILQ_FOREACH_SAFE=no
	fi
	echo "$TAILQ_FOREACH_SAFE"
	rm -f _queue.c _queue
fi

if [ -z "$TAILQ_CONCAT" ]; then
	printf "Testing for TAILQ_CONCAT ..."
	cat <<EOF >_queue.c
#include <sys/queue.h>
int main(void) {
#ifndef TAILQ_CONCAT
#error TAILQ_CONCAT
#endif
	return 0;
}
EOF
	if $XCC _queue.c -o _queue 2>&3; then
		TAILQ_CONCAT=yes
		TAILQ_FOREACH=yes
	else
		TAILQ_CONCAT=no
	fi
	echo "$TAILQ_CONCAT"
	rm -f _queue.c _queue
fi

if [ -z "$TAILQ_FOREACH" ]; then
	printf "Testing for TAILQ_FOREACH ... "
	cat <<EOF >_queue.c
#include <sys/queue.h>
int main(void) {
#ifndef TAILQ_FOREACH
#error TAILQ_FOREACH
#endif
	return 0;
}
EOF
	if $XCC _queue.c -o _queue 2>&3; then
		TAILQ_FOREACH=yes
	else
		TAILQ_FOREACH=no
	fi
	echo "$TAILQ_FOREACH"
	rm -f _queue.c _queue
fi

if [ "$TAILQ_FOREACH_SAFE" = no -o "$TAILQ_CONCAT" = no ]; then
	# If we don't include sys/queue.h then clang analyser finds
	# too many false positives.
	# See http://llvm.org/bugs/show_bug.cgi?id=18222
	# Strictly speaking this isn't needed, but I like it to help
	# catch any nasties.
	if [ "$TAILQ_FOREACH" = yes ]; then
		echo "#include		<sys/queue.h>">>$CONFIG_H
	fi
	echo "#include		\"compat/queue.h\"">>$CONFIG_H
else
	echo "#define HAVE_SYS_QUEUE_H" >>$CONFIG_H
fi

if [ -z "$POSIX_SPAWN" ]; then
	printf "Testing for posix_spawn ... "
	cat <<EOF >_posix_spawn.c
#include <spawn.h>
#include <stdlib.h>

#ifdef __OpenBSD__
#  include <sys/param.h>
#  if OpenBSD<201505
#    error posix_spawn was fixed in OpenBSD-5.7
#  endif
#endif

int main(void) {
	posix_spawn(NULL, NULL, NULL, NULL, NULL, NULL);
	return 0;
}
EOF
	if $XCC _posix_spawn.c -o _posix_spawn 2>&3; then
		POSIX_SPAWN=yes
	else
		POSIX_SPAWN=no
	fi
	echo "$POSIX_SPAWN"
	rm -f _posix_spawn.c _posix_spawn
fi
if [ "$POSIX_SPAWN" = no ]; then
	echo "COMPAT_SRCS+=	compat/posix_spawn.c" >>$CONFIG_MK
else
	echo "#define HAVE_SPAWN_H" >>$CONFIG_H
fi

if [ -z "$POLL" ]; then
	printf "Testing for kqueue1 ... "
	cat <<EOF >_kqueue.c
#include <sys/types.h>
#include <sys/event.h>
int main(void) {
	return kqueue1(0);
}
EOF
	if $XCC _kqueue.c -o _kqueue 2>&3; then
		POLL=kqueue1
 		echo "yes"
 	else
 		echo "no"
 	fi
	rm -f _kqueue.c _kqueue
fi
if [ -z "$POLL" ]; then
	printf "Testing for kqueue ... "
	cat <<EOF >_kqueue.c
#include <sys/types.h>
#include <sys/event.h>
int main(void) {
	return kqueue();
}
EOF
	if $XCC _kqueue.c -o _kqueue 2>&3; then
		POLL=kqueue
 		echo "yes"
 	else
 		echo "no"
 	fi
	rm -f _kqueue.c _kqueue
fi
if [ -z "$POLL" ]; then
	printf "Testing for epoll ... "
	cat <<EOF >_epoll.c
#ifdef __linux__
#include <linux/version.h>
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 37)
#error kernel has buggy epoll_wait timeout
#endif
#endif

#include <sys/epoll.h>
#include <unistd.h>
int main(void) {
	epoll_create1(EPOLL_CLOEXEC);
	epoll_pwait(-1, NULL, 0, 0, NULL);
	return 0;
}
EOF
	if $XCC _epoll.c -o _epoll 2>&3; then
		POLL=epoll
		echo "#define HAVE_EPOLL" >>$CONFIG_MK
		echo "yes"
	else
		echo "no"
	fi
	rm -f _epoll.c _epoll
fi
if [ -z "$POLL" ]; then
	printf "Testing for pselect ... "
	cat <<EOF >_pselect.c
#include <sys/select.h>
#include <stdlib.h>
int main(void) {
	pselect(0, NULL, NULL, NULL, NULL, NULL);
	return 0;
}
EOF
	if $XCC _pselect.c -o _pselect 2>&3; then
		POLL=pselect
		echo "yes"
	else
		echo "no"
	fi
	rm -f _pselect.c _pselect
fi
case "$POLL" in
kqueue1)
	echo "#define HAVE_KQUEUE" >>$CONFIG_H
	echo "#define HAVE_KQUEUE1" >>$CONFIG_H
	;;
kqueue)
	echo "#define HAVE_KQUEUE" >>$CONFIG_H
	;;
epoll)
	echo "#define HAVE_EPOLL" >>$CONFIG_H
	;;
pollts)
	echo "#define HAVE_POLLTS" >>$CONFIG_H
	;;
ppoll)
	echo "#define HAVE_PPOLL" >>$CONFIG_H
	;;
pselect)
	echo "#define HAVE_PSELECT" >>$CONFIG_H
	;;
*)
	echo "No suitable polling function is available, not even pselect" >&2
	exit 1
	;;
esac

if [ -z "$BE64ENC" ]; then
	printf "Testing for be64enc ... "
	cat <<EOF >_be64enc.c
#include <sys/endian.h>
#include <stdlib.h>
int main(void) {
	be64enc(NULL, 0);
	return 0;
}
EOF
	if $XCC _be64enc.c -o _be64enc 2>&3; then
		BE64ENC=yes
	else
		BE64ENC=no
	fi
	echo "$BE64ENC"
	rm -f _be64enc.c _be64enc
fi
if [ "$BE64ENC" = no ]; then
	echo "#include		\"compat/endian.h\"" >>$CONFIG_H
fi

if [ -z "$FLS64" ]; then
	printf "Testing for fls64 ... "
	cat <<EOF >_fls64.c
#include <sys/bitops.h>
int main(void) {
	return (int)fls64(1337);
}
EOF
	if $XCC _fls64.c -o _fls64 2>&3; then
		FLS64=yes
	else
		FLS64=no
	fi
	echo "$FLS64"
	rm -f _fls64.c _fls64
fi
if [ "$FLS64" = yes ]; then
	echo "#define HAVE_SYS_BITOPS_H" >>$CONFIG_H
fi

if [ -z "$MD5" ]; then
	MD5_LIB=
	printf "Testing for MD5Init ... "
	cat <<EOF >_md5.c
#include <sys/types.h>
#include <md5.h>
#include <stdlib.h>
int main(void) {
	MD5_CTX context;
	MD5Init(&context);
	return 0;
}
EOF
	# We only want to link to libmd if it exists in /lib
	if $ALLOW_USR_LIBS; then
		set -- /
	else
		set -- $(ls /lib/libmd.so.* 2>/dev/null)
	fi
	if $XCC _md5.c -o _md5 2>&3; then
		MD5=yes
	elif [ -e "$1" ] && $XCC _md5.c -lmd -o _md5 2>&3; then
		MD5="yes (-lmd)"
		MD5_LIB=-lmd
	else
		MD5=no
	fi
	echo "$MD5"
	rm -f _md5.c _md5
fi
if [ "$MD5" = no ]; then
	echo "MD5_SRC=	crypt/md5.c" >>$CONFIG_MK
else
	echo "MD5_SRC=" >>$CONFIG_MK
	echo "#define HAVE_MD5_H" >>$CONFIG_H
	[ -n "$MD5_LIB" ] && echo "LDADD+=		$MD5_LIB" >>$CONFIG_MK
fi

if [ -z "$SHA2_H" -a -z "$SHA2" -o "$SHA2" != no ]; then
	printf "Testing for sha2.h ... "
	if [ -e /usr/include/sha2.h ]; then
		SHA2_H=sha2.h
	elif [ -e /usr/include/sha256.h ]; then
		SHA2_H=sha256.h
	fi
	if [ -n "$SHA2_H" ]; then
		echo "$SHA2_H"
	else
		echo "no"
	fi
fi

if [ -z "$SHA2" ]; then
	SHA2_LIB=
	SHA2_RENAMED=
	printf "Testing for SHA256_Init ... "
	cat <<EOF >_sha256.c
#include <sys/types.h>
EOF
	[ -n "$SHA2_H" ] && echo "#include <$SHA2_H>">>_sha256.c
	cat <<EOF >>_sha256.c
#include <stdlib.h>
int main(void) {
	SHA256_CTX context;
	SHA256_Init(&context);
	return 0;
}
EOF
	# We only want to link to libmd if it exists in /lib
	if $ALLOW_USR_LIBS; then
		set -- /
	else
		set -- $(ls /lib/libmd.so.* 2>/dev/null)
	fi
	if $XCC _sha256.c -o _sha256 2>&3; then
		SHA2=yes
	elif [ -e "$1" ] && $XCC _sha256.c -lmd -o _sha256 2>&3; then
		SHA2="yes (-lmd)"
		SHA2_LIB=-lmd
	else
		SHA2=no
	fi
	echo "$SHA2"
	rm -f _sha256.c _sha256
	if [ "$SHA2" = no ]; then
		# Did OpenBSD really change this? grrrr
		printf "Testing for SHA256Init ... "
		cat <<EOF >_sha256.c
#include <sys/types.h>
EOF
		[ -n "$SHA2_H" ] && echo "#include <$SHA2_H>">>_sha256.c
		cat <<EOF >>_sha256.c
#include <stdlib.h>
int main(void) {
	SHA2_CTX context;
	SHA256Init(&context);
	return 0;
}
EOF
		# We only want to link to libmd if it exists in /lib
		if $ALLOW_USR_LIBS; then
			set -- /
		else
			set -- $(ls /lib/libmd.so.* 2>/dev/null)
		fi
		if $XCC	_sha256.c -o _sha256 2>&3; then
			SHA2=yes
			SHA2_RENAMED=yes
		elif [ -e "$1" ] && $XCC _sha256.c -lmd -o _sha256 2>&3
		then
			SHA2="yes (-lmd)"
			SHA2_LIB=-lmd
			SHA2_RENAMED=yes
		else
			SHA2=no
		fi
		echo "$SHA2"
		rm -f _sha256.c _sha256
	fi
fi
if [ "$SHA2" = no ]; then
	echo "SHA256_SRC=	crypt/sha256.c" >>$CONFIG_MK
else
	echo "SHA256_SRC=" >>$CONFIG_MK
	echo "#define SHA2_H		<$SHA2_H>" >>$CONFIG_H
	if [ "$SHA2_RENAMED" = yes ]; then
		echo "#define SHA256_CTX	SHA2_CTX" >>$CONFIG_H
		echo "#define SHA256_Init	SHA256Init" >>$CONFIG_H
		echo "#define SHA256_Update	SHA256Update" >>$CONFIG_H
		echo "#define SHA256_Final	SHA256Final" >>$CONFIG_H
	fi
	[ -n "$SHA2_LIB" ] && echo "LDADD+=		$SHA2_LIB" >>$CONFIG_MK
fi

if [ "$DEV" != no -a "$UDEV" != no ]; then
	printf "Checking for libudev ... "
	if type pkg-config >/dev/null 2>&1; then
		LIBUDEV_CFLAGS=$(pkg-config --cflags libudev 2>&3)
		LIBUDEV_LIBS=$(pkg-config --libs libudev 2>&3)
	fi
fi
if [ "$DEV" != no -a "$UDEV" != no -a -n "$LIBUDEV_LIBS" ]; then
	echo "yes"
	[ -z "$DEV" ] && DEV=yes
	echo "DEV_PLUGINS+=	udev" >>$CONFIG_MK
	if [ -n "$LIBUDEV_CFLAGS" ]; then
		echo "LIBUDEV_CFLAGS=		$LIBUDEV_CFLAGS" >>$CONFIG_MK
	fi
	echo "LIBUDEV_LIBS=	$LIBUDEV_LIBS" >>$CONFIG_MK

	printf "Checking udev_monitor_filter_add_match_subsystem_devtype ... "
	cat <<EOF >_udev.c
#include <libudev.h>
#include <stdlib.h>
int main(void) {
	udev_monitor_filter_add_match_subsystem_devtype(NULL, NULL, NULL);
	return 0;
}
EOF
	if $XCC $LIBUDEV_CFLAGS _udev.c -o _udev $LIBUDEV_LIBS 2>&3
	then
		echo "yes"
	else
		echo "LIBUDEV_CPPFLAGS+=	-DLIBUDEV_NOFILTER" >>$CONFIG_MK
		echo "no"
	fi
	rm -f _udev.c _udev

	printf "Checking udev_device_get_is_initialized ... "
	cat <<EOF >_udev.c
#include <libudev.h>
#include <stdlib.h>
int main(void) {
	udev_device_get_is_initialized(NULL);
	return 0;
}
EOF
	if $XCC $LIBUDEV_CFLAGS _udev.c -o _udev $LIBUDEV_LIBS 2>&3
	then
		echo "yes"
	else
		echo "LIBUDEV_CPPFLAGS+=	-DLIBUDEV_NOINIT" >>$CONFIG_MK
		echo "no"
	fi
	rm -f _udev.c _udev
elif [ "$DEV" != no -a "$UDEV" != no ]; then
	echo "no"
fi

if [ "$DEV" = yes ]; then
	echo "DHCPCD_SRCS+=	dev.c" >>$CONFIG_MK
	echo "CPPFLAGS+=	-DPLUGIN_DEV" >>$CONFIG_MK
	echo "MKDIRS+=	dev" >>$CONFIG_MK

	printf "Testing for dlopen ... "
	cat <<EOF >_dlopen.c
#include <dlfcn.h>
#include <stdlib.h>
int main(void) {
	dlopen(NULL, 0);
	return 0;
}
EOF
	if $XCC _dlopen.c -o _dlopen 2>&3; then
		echo "yes"
	elif $XCC _dlopen.c -ldl -o _dlopen 2>&3; then
		echo "yes (-ldl)"
		echo "LDADD+=		-ldl" >>$CONFIG_MK
	else
		echo "no"
		echo "libc for dlopen is required - aborting"
	fi
	rm -f _dlopen.c _dlopen
	$abort && exit 1
fi

# Transform for a make file
SERVICEEXISTS=$(echo "$SERVICEEXISTS" | $SED \
	-e 's:\\:\\\\:g' \
	-e 's:\&:\\\&:g' \
	-e 's:\$:\\\\\$\$:g' \
)
echo "SERVICEEXISTS=	$SERVICEEXISTS" >>config.mk
SERVICECMD=$(echo "$SERVICECMD" | $SED \
	-e 's:\\:\\\\:g' \
	-e 's:\&:\\\&:g' \
	-e 's:\$:\\\\\$\$:g' \
)
echo "SERVICECMD=	$SERVICECMD" >>config.mk
SERVICESTATUS=$(echo "$SERVICESTATUS" | $SED \
	-e 's:\\:\\\\:g' \
	-e 's:\&:\\\&:g' \
	-e 's:\$:\\\\\$\$:g' \
)
echo "SERVICESTATUS=	$SERVICESTATUS" >>config.mk

HOOKS=
if ! $HOOKSET; then
	printf "Checking for ntpd ... "
	NTPD=$(_which ntpd)
	if [ -n "$NTPD" ]; then
		echo "$NTPD (50-ntp.conf)"
	else
		echo "not found"
	fi
	printf "Checking for chronyd ... "
	CHRONYD=$(_which chronyd)
	if [ -n "$CHRONYD" ]; then
		echo "$CHRONYD (50-ntp.conf)"
	else
		echo "not found"
	fi
	if [ -n "$NTPD" -o -n "$CHRONYD" ]; then
		HOOKS="$HOOKS${HOOKS:+ }50-ntp.conf"
	fi
	# Warn if both are detected
	if [ -n "$NTPD" -a -n "$CHRONYD" ]; then
		echo "NTP will default to $NTPD"
	fi

	printf "Checking for ypbind ... "
	YPBIND=$(_which ypbind)
	if [ -n "$YPBIND" ]; then
		YPHOOK="50-ypbind"
		if strings "$YPBIND" | $GREP -q yp\\.conf; then
			YPHOOK="50-yp.conf"
			YPOS="Linux"
		elif strings "$YPBIND" | $GREP -q \\.ypservers; then
			YPOS="NetBSD"
			echo "YPDOMAIN_DIR=	/var/yp" >>$CONFIG_MK
			echo "YPDOMAIN_SUFFIX=.ypservers" >>$CONFIG_MK
		elif strings "$YPBIND" | $GREP -q /etc/yp; then
			YPOS="OpenBSD"
			echo "YPDOMAIN_DIR=	/etc/yp" >>$CONFIG_MK
			echo "YPDOMAIN_SUFFIX=" >>$CONFIG_MK
		else
			YPOS="FreeBSD"
			echo "YPDOMAIN_DIR=" >>$CONFIG_MK
			echo "YPDOMAIN_SUFFIX=" >>$CONFIG_MK
		fi
		echo "$YPBIND ($YPHOOK${YPOS:+ }$YPOS)"
		EGHOOKS="$EGHOOKS${EGHOOKS:+ }$YPHOOK"
	else
		echo "not found"
	fi
fi

if cd dhcpcd-hooks; then
	for x in $HOOKSCRIPTS; do
		printf "Finding hook $x ... "
		for h in [0-9][0-9]"-$x" \
		    [0-9][0-9]"-$x.sh" \
		    [0-9][0-9]"-$x.conf"
		do
			[ -e "$h" ] && break
		done
		if [ ! -e "$h" ]; then
			echo "no"
		else
			echo "$h"
			case " $HOOKS " in
			*" $h "*)	;;
			*)		HOOKS="$HOOKS${HOOKS:+ }$h";;
			esac
		fi
	done
	for x in $EGHOOKSCRIPTS; do
		printf "Finding example hook $x ... "
		for h in [0-9][0-9]"-$x" \
		    [0-9][0-9]"-$x.sh" \
		    [0-9][0-9]"-$x.conf"
		do
			[ -e "$h" ] && break
		done
		if [ ! -e "$h" ]; then
			echo "no"
		else
			echo "$h"
			case " $EGHOOKS " in
			*" $h "*)	;;
			*)		EGHOOKS="$EGHOOKS${EGHOOKS:+ }$h";;
			esac
		fi
	done
	cd ..
fi
echo "HOOKSCRIPTS=	$HOOKS" >>$CONFIG_MK
echo "EGHOOKSCRIPTS=	$EGHOOKS" >>$CONFIG_MK

echo
echo "   SYSCONFDIR =		$SYSCONFDIR"
echo "   SBINDIR =		$SBINDIR"
echo "   LIBDIR =		$LIBDIR"
echo "   LIBEXECDIR =		$LIBEXECDIR"
echo "   DBDIR =		$DBDIR"
echo "   RUNDIR =		$RUNDIR"	
echo "   MANDIR =		$MANDIR"
echo "   DATADIR =		$DATADIR"
echo "   HOOKSCRIPTS =	$HOOKS"
echo "   EGHOOKSCRIPTS =	$EGHOOKS"
echo

rm -f dhcpcd tests/test