configure.ac

AC_PREREQ(2.60a)

AC_INIT([asterisk], [trunk], [https://issues.asterisk.org])

# cross-compile macros
AC_CANONICAL_BUILD
AC_CANONICAL_HOST

# check existence of the package
AC_CONFIG_SRCDIR([main/asterisk.c])

AC_COPYRIGHT("Asterisk")

# preserve any CFLAGS or LDFLAGS that may be set
# NOTE: This must be done before calling any macros that end up
# calling AC_PROG_CC or the like, since they will set a default
# set of CFLAGS ("-g -O2") if the user did not supply any, and
# we don't want those default flags to be carried over into the
# rest of the build system since we have other means of controlling
# debugging symbol generation and optimization.
CONFIG_CFLAGS="${CFLAGS}"
CONFIG_LDFLAGS="${LDFLAGS}"
AC_SUBST(CONFIG_CFLAGS)
AC_SUBST(CONFIG_LDFLAGS)

# specify output header file
AC_CONFIG_HEADER(include/asterisk/autoconfig.h)

# Note: AC_PROG_CC *must* be specified before AC_USE_SYSTEM_EXTENSIONS or any
# other macro that uses the C compiler, or the default order will be used.
AC_PROG_CC([gcc cc])

AC_USE_SYSTEM_EXTENSIONS	dnl note- does not work on FreeBSD

# System default paths
AC_SUBST([astsbindir],        ['${sbindir}'])dnl
AC_SUBST([astcachedir],       ['${localstatedir}/cache/asterisk'])dnl
AC_SUBST([astetcdir],         ['${sysconfdir}/asterisk'])dnl
AC_SUBST([astheaderdir],      ['${includedir}/asterisk'])dnl
AC_SUBST([astlibdir],         ['${libdir}'])dnl
AC_SUBST([astmoddir],         ['${libdir}/asterisk/modules'])dnl
AC_SUBST([astmandir],         ['${mandir}'])dnl
AC_SUBST([astvarlibdir],      ['${localstatedir}/lib/asterisk'])dnl
AC_SUBST([astdatadir],        ['${astvarlibdir}'])dnl
AC_SUBST([astdbdir],          ['${astvarlibdir}'])dnl
AC_SUBST([astkeydir],         ['${astvarlibdir}'])dnl
AC_SUBST([astspooldir],       ['${localstatedir}/spool/asterisk'])dnl
AC_SUBST([astlogdir],         ['${localstatedir}/log/asterisk'])dnl
AC_SUBST([astvarrundir],      ['${localstatedir}/run/asterisk'])dnl

case "${host_os}" in
     *bsd*)
     if test ${prefix} != 'NONE'; then
        astvarlibdir='${prefix}/share/asterisk'
        astdbdir='${localstatedir}/db/asterisk'
     fi
     ;;
     darwin*)
     if test ${prefix} = 'NONE'; then
        astvarrundir='/Library/Application Support/Asterisk/Run'
     fi
     ;;
esac

case "${host_os}" in
     netbsd*)
     ac_default_prefix=/usr/pkg
     CPPFLAGS=-I/usr/pkg/include
     LDFLAGS=-L/usr/pkg/lib
     ;;
     dragonfly*|freebsd*)
     ac_default_prefix=/usr/local
     CPPFLAGS=-I/usr/local/include
     LDFLAGS=-L/usr/local/lib
     ;;
     openbsd*)
     ac_default_prefix=/usr/local
     if test ${prefix} = '/usr/local' || test ${prefix} = 'NONE'; then
        if test ${sysconfdir} = '${prefix}/etc'; then
           astetcdir=/etc/asterisk
        fi
        if test ${mandir} = '${prefix}/man'; then
           astmandir=/usr/share/man
        fi
     fi
     CPPFLAGS=-I/usr/local/include
     LDFLAGS=-L/usr/local/lib
     ;;
     darwin*)
     ac_default_prefix=/usr/local
     if test ${prefix} = 'NONE'; then
        astmoddir='/Library/Application Support/Asterisk/Modules'
        astvarlibdir='/Library/Application Support/Asterisk'
        astlogdir=/Library/Logs/Asterisk
        astvarrundir='/Library/Application Support/Asterisk/Run'
     fi
     AC_DEFINE([AST_POLL_COMPAT], 1, [Define to 1 if internal poll should be used.])
     AC_DEFINE([_DARWIN_UNLIMITED_SELECT], 1, [Define to 1 if running on Darwin.])
     ;;
     solaris*)
     if test ${prefix} = 'NONE'; then
        astcachedir=/var/cache/asterisk
        astetcdir=/var/etc/asterisk
        astsbindir=/opt/asterisk/sbin
        astlibdir=/opt/asterisk/lib
        astmoddir=/opt/asterisk/lib/modules
        astheaderdir=/opt/asterisk/include
        astmandir=/opt/asterisk/man
        astvarlibdir=/var/opt/asterisk
        astspooldir=/var/spool/asterisk
        astlogdir=/var/log/asterisk
        astvarrundir=/var/run/asterisk
     fi
     ;;
     *)
     ac_default_prefix=/usr
     if test ${prefix} = '/usr' || test ${prefix} = 'NONE'; then
        if test ${sysconfdir} = '${prefix}/etc'; then
           sysconfdir=/etc
        fi
        if test ${mandir} = '${prefix}/man'; then
           mandir=/usr/share/man
        fi
     fi
     ;;
esac

if test ${prefix} = ${ac_default_prefix} || test ${prefix} = 'NONE'; then
     if test ${localstatedir} = '${prefix}/var'; then
        localstatedir=/var
     fi
fi

BUILD_PLATFORM=${build}
BUILD_CPU=${build_cpu}
BUILD_VENDOR=${build_vendor}
BUILD_OS=${build_os}

AC_SUBST(BUILD_PLATFORM)
AC_SUBST(BUILD_CPU)
AC_SUBST(BUILD_VENDOR)
AC_SUBST(BUILD_OS)

HOST_PLATFORM=${host}
HOST_CPU=${host_cpu}
HOST_VENDOR=${host_vendor}
HOST_OS=${host_os}

AC_SUBST(HOST_PLATFORM)
AC_SUBST(HOST_CPU)
AC_SUBST(HOST_VENDOR)
AC_SUBST(HOST_OS)

PBX_WINARCH=0

case "${host_os}" in
     dragonfly*|freebsd*)
     OSARCH=FreeBSD
     ;;
     netbsd*)
     OSARCH=NetBSD
     ;;
     openbsd*)
     OSARCH=OpenBSD
     ;;
     solaris*)
     OSARCH=SunOS
     ;;
     mingw32)
     OSARCH=mingw32
     PBX_WINARCH=1
     ;;
     cygwin)
     OSARCH=cygwin
     PBX_WINARCH=1
     ;;
     linux-gnu*)
     OSARCH=linux-gnu
     ;;
     linux-musl*)
     OSARCH=linux-musl
     ;;
     kfreebsd*-gnu)
     OSARCH=kfreebsd-gnu
     ;;
     *)
     OSARCH=${host_os}
     ;;
esac

AC_SUBST(OSARCH)
AC_SUBST(PBX_WINARCH)

AC_MSG_CHECKING(whether char is unsigned)
AC_COMPILE_IFELSE(
	[
		AC_LANG_SOURCE(
#include <limits.h>
#if CHAR_MIN == 0
#error
#endif
		)
	],[
		AC_MSG_RESULT(no)
		CONFIG_SIGNED_CHAR=""
	],[
		AC_MSG_RESULT(yes)
		CONFIG_SIGNED_CHAR="-fsigned-char"
	]
)
AC_SUBST(CONFIG_SIGNED_CHAR)

#  check for uname
AC_PATH_TOOL([UNAME], [uname], :)
if test "x${UNAME}" != "x:"; then
   PBX_OSREV=$(${UNAME} -r)
fi
AC_SUBST(PBX_OSREV)

AH_TOP([#ifndef ASTERISK_AUTOCONFIG_H
#define ASTERISK_AUTOCONFIG_H
/* IWYU pragma: private, include "asterisk.h" */

#include "asterisk/buildopts.h" /* IWYU pragma: export */])

AH_BOTTOM([#endif	/* ASTERISK_AUTOCONFIG_H */])

# cross-compile checks
if test "${cross_compiling}" = "yes";
then
   AC_CHECK_TOOL(CC, gcc, :)
   AC_CHECK_TOOL(CXX, g++, :)
   AC_CHECK_TOOL(LD, ld, :)
   AC_CHECK_TOOL(RANLIB, ranlib, :)
   CROSS_COMPILING=1
   AC_SUBST(CROSS_COMPILING)
fi

# Checks for programs.
AC_PROG_CXX
AC_PROG_CPP
AC_PROG_CXXCPP
# This macro is just copied into our local acinclude.m4 from libtool.m4 so that
# the developers regenerating the configure script don't have to install libtool.
AST_PROG_LD	# note, does not work on FreeBSD
AC_PROG_AWK
AC_PROG_INSTALL
AC_PROG_LN_S
AC_PROG_RANLIB
AST_CHECK_GNU_MAKE
AC_PROG_EGREP

AC_CHECK_TOOLS([STRIP], [strip gstrip], :)
AC_CHECK_TOOLS([AR], [ar gar], :)

GNU_LD=0
if test "x$with_gnu_ld" = "xyes" ; then
   GNU_LD=1
fi
AC_SUBST(GNU_LD)

AC_PATH_PROG([BISON], [bison], :)
AC_PATH_PROG([CMP], [cmp], :)
AC_PATH_PROG([CAT], [cat], :)
AC_PATH_PROG([CUT], [cut], :)
AC_PATH_PROG([FLEX], [flex], :)
AC_PATH_PROG([GREP], [grep], :)
AC_PATH_PROGS([PYTHON], [python2.7 python2 python python3], :)
AC_PATH_PROG([FIND], [find], :)
AC_PATH_PROG([BASENAME], [basename], :)
AC_PATH_PROG([DIRNAME], [dirname], :)
AC_PATH_PROG([SHELL], [sh], :)
AC_PATH_PROG([LN], [ln], :)
AC_PATH_PROG([DOXYGEN], [doxygen], :)
AC_PATH_PROG([DOT], [dot], :)
AC_PATH_PROG([WGET], [wget], :)
AC_PATH_PROG([CURL], [curl], :)
AC_PATH_PROG([XMLLINT], [xmllint], :)
AC_PATH_PROGS([XMLSTARLET], [xmlstarlet xml], :)
AC_PATH_PROG([BASH], [bash], :)
AC_PATH_PROG([GIT], [git], :)
AC_PATH_PROG([ALEMBIC], [alembic], :)
AC_PATH_PROG([BZIP2], [bzip2], :)
AC_PATH_PROG([TAR], [tar], :)
AC_PATH_PROG([PATCH], [patch], :)
AC_PATH_PROG([SED], [sed], :)
AC_PATH_PROG([NM], [nm], :)
AC_PATH_PROG([REALPATH], [realpath], :)


DOWNLOAD=":"
DOWNLOAD_TO_STDOUT=
DOWNLOAD_TIMEOUT=
if test "x${WGET}" != "x:"; then
  DOWNLOAD=${WGET}
  DOWNLOAD_TO_STDOUT="${WGET} -q -O-"
  DOWNLOAD_TIMEOUT='--timeout=$1'
elif test "x${CURL}" != "x:"; then
  DOWNLOAD="${CURL} -O --progress-bar -w \"%{url_effective}\n\""
  DOWNLOAD_TO_STDOUT="${CURL} -Ls"
  DOWNLOAD_TIMEOUT='--max-time $(or $2,$1)'
else
  AC_PATH_PROG([FETCH], [fetch], :)
  if test "x${FETCH}" != "x:"; then
    DOWNLOAD=${FETCH}
    DOWNLOAD_TO_STDOUT="${FETCH} -o-"
    DOWNLOAD_TIMEOUT='--timeout=$(or $2,$1)'
  fi
fi
AC_SUBST(DOWNLOAD)
AC_SUBST(DOWNLOAD_TO_STDOUT)
AC_SUBST(DOWNLOAD_TIMEOUT)

AC_PATH_PROG([LDCONFIG], [ldconfig], :)
AC_PATH_PROG([SHA1SUM], [sha1sum], $ac_aux_dir/build_tools/sha1sum-sh)
AC_PATH_PROG([OPENSSL], [openssl], :)

PKG_PROG_PKG_CONFIG()

AC_CACHE_CHECK([for bison that supports parse-param], [ac_cv_path_BISON2], [
	if test "x$BISON" != "x:" ; then
		# Create a temporary directory $tmp in $TMPDIR (default /tmp).
		# Use mktemp if possible; otherwise fall back on mkdir,
		# with $RANDOM to make collisions less likely.
		: ${TMPDIR=/tmp}
		{
		  tmp=`
		    (umask 077 && mktemp -d "$TMPDIR/fooXXXXXX") 2>/dev/null
		  ` &&
		  test -n "$tmp" && test -d "$tmp"
		} || {
		  tmp=$TMPDIR/foo$$-$RANDOM
		  (umask 077 && mkdir "$tmp")
		} || exit $?
		cat >$tmp/test.y <<__EOL__
%parse-param {struct parse_io *parseio}
%%
file : { \$\$ = parseio->pval = 1; }
	;
%%
__EOL__
		${BISON} -o ${tmp}/test.tab.c ${tmp}/test.y >/dev/null 2>&1
		if test -e "${tmp}/test.tab.c"; then
			ac_cv_path_BISON2=${BISON}
		fi
		rm -rf ${tmp}
	fi
	])
if test "x${ac_cv_path_BISON2}" = "x" ; then
	BISON=:
	PBX_BISON=0
else
	PBX_BISON=1
fi
AC_SUBST(PBX_BISON)

if test "${FLEX}" = ":"; then
	PBX_FLEX=0
else
	PBX_FLEX=1
fi
AC_SUBST(PBX_FLEX)

if test "${XMLSTARLET}" = ":"; then
	PBX_XMLSTARLET=0
else
	PBX_XMLSTARLET=1
fi
AC_SUBST(PBX_XMLSTARLET)

if test "${BASH}" = ":"; then
	PBX_BASH=0
else
	PBX_BASH=1
fi
AC_SUBST(PBX_BASH)

AC_CHECK_TOOL([SOXMIX], [soxmix], :)
if test "x${SOXMIX}" != "x:"; then
	AC_DEFINE([HAVE_SOXMIX], 1, [Define to 1 if your system has soxmix application.])
fi

AC_CHECK_PROGS([MD5], [md5 md5sum gmd5sum digest])

if test "${MD5}" = "digest" ; then
   MD5="${MD5} -a md5"
fi

AX_PTHREAD

AC_LANG(C)

PBX_NO_BINARY_MODULES=0
AC_ARG_ENABLE([binary-modules],
	[AS_HELP_STRING([--disable-binary-modules],
		[Block installation of binary modules.])],
	[case "${enableval}" in
	      y|ye|yes) PBX_NO_BINARY_MODULES=0 ;;
	      n|no)  PBX_NO_BINARY_MODULES=1 ;;
	      *) AC_MSG_ERROR(bad value ${enableval} for --disable-binary-modules)  ;;
	esac])
AC_SUBST(PBX_NO_BINARY_MODULES)

AC_ARG_ENABLE([dev-mode],
	[AS_HELP_STRING([--enable-dev-mode],
		[Turn on developer mode])],
	[case "${enableval}" in
	      y|ye|yes) AST_DEVMODE=yes ;;
	      n|no)  AST_DEVMODE=no ;;
	      noisy)
	      AST_DEVMODE=yes
	      NOISY_BUILD=yes
	      ;;
	      strict)
	      AST_DEVMODE=yes
	      AST_DEVMODE_STRICT=yes
	      ;;
	      *) AC_MSG_ERROR(bad value ${enableval} for --enable-dev-mode)  ;;
	esac])
AC_SUBST(NOISY_BUILD)
AC_SUBST(AST_DEVMODE)
AC_SUBST(AST_DEVMODE_STRICT)

AST_OPTION_ONLY([download-cache], [AST_DOWNLOAD_CACHE], [cached sound AND external module tarfiles], [])
AST_OPTION_ONLY([sounds-cache], [SOUNDS_CACHE_DIR], [cached sound tarfiles], [])
AST_OPTION_ONLY([externals-cache], [EXTERNALS_CACHE_DIR], [cached external module tarfiles], [])

AST_CODE_COVERAGE=no
AC_ARG_ENABLE([coverage],
	[AS_HELP_STRING([--enable-coverage],
		[Turn on code coverage tracking (for gcov)])],
	[case "${enableval}" in
	      y|ye|yes) AST_CODE_COVERAGE=yes ;;
	      n|no) AST_CODE_COVERAGE=no ;;
	      *) AC_MSG_ERROR(bad value ${enableval} for --enable-coverage)  ;;
	esac])
AC_SUBST(AST_CODE_COVERAGE)

AST_CHECK_RAII()
AST_CHECK_STRSEP_ARRAY_BOUNDS()

JANSSON_BUNDLED=no
AC_ARG_WITH([jansson-bundled],
	[AS_HELP_STRING([--with-jansson-bundled],
		[Use bundled jansson library])],
	[case "${withval}" in
		y|ye|yes) JANSSON_BUNDLED=yes ;;
		*) JANSSON_BUNDLED=no ;;
	esac])

PJPROJECT_BUNDLED=yes
AH_TEMPLATE(m4_bpatsubst([[HAVE_PJPROJECT_BUNDLED]], [(.*)]), [Define to 1 when using the bundled pjproject.])

AC_ARG_WITH([pjproject-bundled],
	[AS_HELP_STRING([--with-pjproject-bundled],
		[Use bundled pjproject libraries (default)])],
	[case "${withval}" in
	      n|no) PJPROJECT_BUNDLED=no ;;
	      *) PJPROJECT_BUNDLED=yes ;;
	esac])

if test "${with_pjproject}" = "no" || test "${with_pjproject}" = "n" ; then
	PJPROJECT_BUNDLED=no
fi

#
# OpenSSL stuff has to be done here because we want to pass
# any resulting CFLAGS and LDFLAGS to the bundled pjproject
# configure done in THIRD_PARTY_CONFIGURE()
#
AST_EXT_LIB_SETUP([CRYPTO], [OpenSSL Cryptography], [crypto])
AST_EXT_LIB_SETUP([OPENSSL], [OpenSSL Secure Sockets Layer], [ssl])
AST_EXT_LIB_SETUP_OPTIONAL([OPENSSL_BIO_METHOD], [OpenSSL BIO Method Support], [CRYPTO], [crypto])

# If neither --without-ssl (PBX_OPENSSL=-1) nor --without-crypto (PBX_CRYPTO=-1)
# and there were no directories atdded to --with-ssl and --with-crypto, and
# pkg-config is installed (which is should be by install_prereq).
if test "x$PKG_CONFIG" != "x" -a $PBX_OPENSSL -ge 0 -a $PBX_CRYPTO -ge 0 -a "x$OPENSSL_DIR" = "x" ; then
	AC_MSG_NOTICE(checking OPENSSL with pkg-config)
	AC_MSG_NOTICE(checking whether system openssl > 1.1.0)
	AST_PKG_CONFIG_CHECK([OPENSSL], [openssl >= 1.1.0])
	if test $PBX_OPENSSL -eq 0 ; then
		AC_MSG_NOTICE(checking whether alternate openssl11 is installed)
		AST_PKG_CONFIG_CHECK([OPENSSL], [openssl11])
	fi
	if test $PBX_OPENSSL -eq 1 ; then
		AC_DEFINE([HAVE_OPENSSL_BIO_METHOD], 1)
		PBX_OPENSSL_BIO_METHOD=1
	else
		AC_MSG_NOTICE(checking fallback system openssl)
		AST_PKG_CONFIG_CHECK([OPENSSL], [openssl])
	fi

	if test $PBX_OPENSSL -eq 1; then
		AC_DEFINE([HAVE_CRYPTO], 1)
		PBX_CRYPTO=1
	fi
else
	AC_MSG_NOTICE(Checking OPENSSL without pkg-config)
	AST_EXT_LIB_CHECK([CRYPTO], [crypto], [AES_encrypt], [openssl/aes.h])
	if test "$PBX_CRYPTO" = "1";
	then
		AST_EXT_LIB_CHECK([OPENSSL], [ssl], [SSL_connect], [openssl/ssl.h], [-lcrypto])
		AST_EXT_LIB_CHECK([OPENSSL_BIO_METHOD], [ssl], [BIO_meth_new], [openssl/ssl.h], [-lcrypto])
	fi
fi
if test $PBX_OPENSSL -eq 0 ; then
	AC_MSG_WARN(OpenSSL does not seem to be installed)
fi


THIRD_PARTY_CONFIGURE()

# AST_EXT_LIB_SETUP is used to tell configure to handle variables for
# various packages.
# $1 is the prefix for the variables in makeopts and autoconfig.h
# $2 is the short comment, $4 is the long comment
# $3 is the name used in --with- or --without- flags for configure.
#
# Package option names should be in alphabetical order
# by the --with option name (the third field),
# to make things easier for the users.

AST_EXT_LIB_SETUP([ALSA], [Advanced Linux Sound Architecture], [asound])
AST_EXT_LIB_SETUP([BFD], [Debug symbol decoding], [bfd])

# BKTR is used for backtrace support on platforms that do not
# have it natively.
AST_EXT_LIB_SETUP([BKTR], [Stack Backtrace], [execinfo])
AST_EXT_LIB_SETUP([BLUETOOTH], [Bluetooth], [bluetooth])
AST_EXT_LIB_SETUP([CAP], [POSIX 1.e capabilities], [cap])
AST_EXT_LIB_SETUP([CODEC2], [Codec 2 Audio Decoder/Encoder], [codec2])
AST_EXT_LIB_SETUP([COROSYNC], [Corosync], [cpg])
AST_EXT_LIB_SETUP_OPTIONAL([COROSYNC_CFG_STATE_TRACK], [A callback only in corosync 1.x], [COROSYNC], [cfg])
AST_EXT_LIB_SETUP([CRYPT], [password and data encryption], [crypt])
AST_EXT_LIB_SETUP([DAHDI], [DAHDI], [dahdi])
AST_EXT_LIB_SETUP([FFMPEG], [Ffmpeg and avcodec], [avcodec])
AST_EXT_LIB_SETUP([GSM], [External GSM], [gsm], [, use 'internal' GSM otherwise])
AST_EXT_LIB_SETUP([ILBC], [System iLBC], [ilbc], [, use 'internal' iLBC otherwise])
AST_EXT_LIB_SETUP([GTK2], [gtk2], [gtk2])
AST_EXT_LIB_SETUP([GMIME], [GMime], [gmime])
AST_EXT_LIB_SETUP([HOARD], [Hoard Memory Allocator], [hoard])
AST_EXT_LIB_SETUP([ICAL], [iCal], [ical])
AST_EXT_LIB_SETUP([ICONV], [Iconv], [iconv])
AST_EXT_LIB_SETUP([IKSEMEL], [Iksemel Jabber], [iksemel])
AST_EXT_LIB_SETUP([IMAP_TK], [UW IMAP Toolkit], [imap])
AST_EXT_LIB_SETUP([INOTIFY], [inotify support], [inotify])
AST_EXT_LIB_SETUP([IODBC], [iODBC], [iodbc])
AST_EXT_LIB_SETUP([JACK], [Jack Audio Connection Kit], [jack])
AST_EXT_LIB_SETUP([JANSSON], [Jansson JSON library], [jansson])
AST_EXT_LIB_SETUP([URIPARSER], [uriparser library], [uriparser])
AST_EXT_LIB_SETUP([KQUEUE], [kqueue support], [kqueue])
AST_EXT_LIB_SETUP([LDAP], [OpenLDAP], [ldap])
AST_LIBCURL_CHECK_CONFIG([], [7.10.1])
AST_EXT_LIB_SETUP([LIBEDIT], [NetBSD Editline library], [libedit])
AST_EXT_LIB_SETUP_OPTIONAL([LIBEDIT_IS_UNICODE], [Libedit compiled for unicode], [LIBEDIT], [libedit])
AST_EXT_LIB_SETUP([LIBXML2], [LibXML2], [libxml2])
AST_EXT_LIB_SETUP([LIBXSLT], [LibXSLT], [libxslt])
AST_EXT_LIB_SETUP_OPTIONAL([LIBXSLT_CLEANUP], [LibXSLT Library Cleanup Function], [LIBXSLT], [libxslt])
AST_EXT_LIB_SETUP([LUA], [Lua], [lua])
AC_ARG_VAR([LUA_VERSIONS],[A space separated list of target lua versions to test.])
AST_EXT_LIB_SETUP([MYSQLCLIENT], [MySQL client], [mysqlclient])
AST_EXT_LIB_SETUP([NEON], [neon], [neon])
AST_EXT_LIB_SETUP([NEON29], [neon29], [neon29])
AST_EXT_LIB_SETUP([NETSNMP], [Net-SNMP], [netsnmp])
AST_EXT_LIB_SETUP([NEWT], [newt], [newt])
AST_EXT_LIB_SETUP([OGG], [OGG], [ogg])
AST_EXT_LIB_SETUP([OPENR2], [MFR2], [openr2])
AST_EXT_LIB_SETUP([OPUS], [Opus], [opus])
AST_EXT_LIB_SETUP([OPUSFILE], [Opusfile], [opusfile])
AST_EXT_LIB_SETUP([OSPTK], [OSP Toolkit], [osptk])
AST_EXT_LIB_SETUP([PGSQL], [PostgreSQL], [postgres])
AST_EXT_LIB_SETUP([BEANSTALK], [Beanstalk Job Queue], [beanstalk])

if test "x${PBX_PJPROJECT}" != "x1" ; then
AST_EXT_LIB_SETUP([PJPROJECT], [PJPROJECT], [pjproject])
AST_EXT_LIB_SETUP_OPTIONAL([PJSIP_DLG_CREATE_UAS_AND_INC_LOCK], [PJSIP Dialog Create UAS with Incremented Lock], [PJPROJECT], [pjsip])
AST_EXT_LIB_SETUP_OPTIONAL([PJ_TRANSACTION_GRP_LOCK], [PJSIP Transaction Group Lock Support], [PJPROJECT], [pjsip])
AST_EXT_LIB_SETUP_OPTIONAL([PJSIP_REPLACE_MEDIA_STREAM], [PJSIP Media Stream Replacement Support], [PJPROJECT], [pjsip])
AST_EXT_LIB_SETUP_OPTIONAL([PJSIP_GET_DEST_INFO], [pjsip_get_dest_info support], [PJPROJECT], [pjsip])
AST_EXT_LIB_SETUP_OPTIONAL([PJ_SSL_CERT_LOAD_FROM_FILES2], [pj_ssl_cert_load_from_files2 support], [PJPROJECT], [pjsip])
AST_EXT_LIB_SETUP_OPTIONAL([PJSIP_EXTERNAL_RESOLVER], [PJSIP External Resolver Support], [PJPROJECT], [pjsip])
AST_EXT_LIB_SETUP_OPTIONAL([PJSIP_TLS_TRANSPORT_PROTO], [PJSIP TLS Transport proto field support], [PJPROJECT], [pjsip])
AST_EXT_LIB_SETUP_OPTIONAL([PJSIP_EVSUB_GRP_LOCK], [PJSIP EVSUB Group Lock support], [PJPROJECT], [pjsip])
AST_EXT_LIB_SETUP_OPTIONAL([PJSIP_INV_SESSION_REF], [PJSIP INVITE Session Reference Count support], [PJPROJECT], [pjsip])
AST_EXT_LIB_SETUP_OPTIONAL([PJSIP_AUTH_CLT_DEINIT], [pjsip_auth_clt_deinit support], [PJPROJECT], [pjsip])
AST_EXT_LIB_SETUP_OPTIONAL([PJSIP_TSX_LAYER_FIND_TSX2], [pjsip_tsx_layer_find_tsx2 support], [PJPROJECT], [pjsip])
AST_EXT_LIB_SETUP_OPTIONAL([PJSIP_INV_ACCEPT_MULTIPLE_SDP_ANSWERS], [PJSIP INVITE Accept Multiple SDP Answers], [PJPROJECT], [pjsip])
AST_EXT_LIB_SETUP_OPTIONAL([PJSIP_ENDPOINT_COMPACT_FORM], [PJSIP Compact Form Support on Endpoint], [PJPROJECT], [pjsip])
AST_EXT_LIB_SETUP_OPTIONAL([PJSIP_TRANSPORT_DISABLE_CONNECTION_REUSE], [PJSIP Transport Connection Reuse Disabling], [PJPROJECT], [pjsip])
AST_EXT_LIB_SETUP_OPTIONAL([PJSIP_OAUTH_AUTHENTICATION], [PJSIP OAuth Authentication Support], [PJPROJECT], [pjsip])
AST_EXT_LIB_SETUP_OPTIONAL([PJSIP_TLS_TRANSPORT_RESTART], [PJSIP TLS Transport Restart Support], [PJPROJECT], [pjsip])
fi

AST_EXT_LIB_SETUP([POPT], [popt], [popt])
AST_EXT_LIB_SETUP([PORTAUDIO], [PortAudio], [portaudio])
AST_EXT_LIB_SETUP([PRI], [ISDN PRI], [pri])
AST_EXT_LIB_SETUP_OPTIONAL([PRI_SETUP_ACK_INBAND], [ISDN PRI progress inband ie in SETUP ACK], [PRI], [pri])
AST_EXT_LIB_SETUP_OPTIONAL([PRI_L2_PERSISTENCE], [ISDN Layer 2 persistence option], [PRI], [pri])
AST_EXT_LIB_SETUP_OPTIONAL([PRI_DATETIME_SEND], [ISDN PRI Date/time ie send policy], [PRI], [pri])
AST_EXT_LIB_SETUP_OPTIONAL([PRI_MWI_V2], [ISDN PRI Message Waiting Indication (Fixed)], [PRI], [pri])
AST_EXT_LIB_SETUP_OPTIONAL([PRI_DISPLAY_TEXT], [ISDN PRI user display text IE contents during call], [PRI], [pri])
AST_EXT_LIB_SETUP_OPTIONAL([PRI_MWI], [ISDN PRI Message Waiting Indication], [PRI], [pri])
AST_EXT_LIB_SETUP_OPTIONAL([PRI_MCID], [ISDN PRI Malicious Call ID], [PRI], [pri])
AST_EXT_LIB_SETUP_OPTIONAL([PRI_CALL_WAITING], [ISDN PRI call waiting supplementary service], [PRI], [pri])
AST_EXT_LIB_SETUP_OPTIONAL([PRI_AOC_EVENTS], [ISDN PRI advice of charge supplementary service events], [PRI], [pri])
AST_EXT_LIB_SETUP_OPTIONAL([PRI_TRANSFER], [ISDN PRI call transfer supplementary service], [PRI], [pri])
AST_EXT_LIB_SETUP_OPTIONAL([PRI_CCSS], [ISDN PRI call completion supplementary service], [PRI], [pri])
AST_EXT_LIB_SETUP_OPTIONAL([PRI_HANGUP_FIX], [ISDN PRI hangup fix], [PRI], [pri])
AST_EXT_LIB_SETUP_OPTIONAL([PRI_SUBADDR], [ISDN PRI subaddressing], [PRI], [pri])
AST_EXT_LIB_SETUP_OPTIONAL([PRI_CALL_HOLD], [ISDN PRI call hold], [PRI], [pri])
AST_EXT_LIB_SETUP_OPTIONAL([PRI_CALL_REROUTING], [ISDN PRI call rerouting and call deflection], [PRI], [pri])
AST_EXT_LIB_SETUP_OPTIONAL([PRI_SETUP_KEYPAD], [ISDN PRI keypad facility in SETUP], [PRI], [pri])
# ------------------------------------v
# TODO: The code can be changed to always include these features now.
# These features will always be present if pri_connected_line_update is available.
AST_EXT_LIB_SETUP_OPTIONAL([PRI_INBANDDISCONNECT], [ISDN PRI set_inbanddisconnect], [PRI], [pri])
AST_EXT_LIB_SETUP_OPTIONAL([PRI_PROG_W_CAUSE], [ISDN progress with cause], [PRI], [pri])
AST_EXT_LIB_SETUP_OPTIONAL([PRI_SERVICE_MESSAGES], [ISDN service messages], [PRI], [pri])
AST_EXT_LIB_SETUP_OPTIONAL([PRI_REVERSE_CHARGE], [ISDN reverse charge], [PRI], [pri])
# ------------------------------------^
AST_EXT_LIB_SETUP([RADIUS], [Radius Client], [radius])
AST_EXT_LIB_SETUP([FFTW3], [LIBFFTW3], [fftw3])
AST_EXT_LIB_SETUP([RESAMPLE], [LIBRESAMPLE], [resample])
AST_EXT_LIB_SETUP([SNDFILE], [libsndfile], [sndfile])
AST_EXT_LIB_SETUP([SDL], [Sdl], [sdl])
AST_EXT_LIB_SETUP([SDL_IMAGE], [Sdl Image], [SDL_image])
AST_EXT_LIB_SETUP([SPANDSP], [SPANDSP], [spandsp])
AST_EXT_LIB_SETUP([SS7], [ISDN SS7], [ss7])
AST_EXT_LIB_SETUP([SPEEX], [Speex], [speex])
AST_EXT_LIB_SETUP([SPEEX_PREPROCESS], [Speex preprocess routines], [speex])
AST_EXT_LIB_SETUP([SPEEXDSP], [SpeexDSP], [speexdsp])
AST_EXT_LIB_SETUP_DEPENDENT([SPEEX_PREPROCESS], [speex_preprocess_ctl], [], [speex])
AST_EXT_LIB_SETUP([SQLITE3], [SQLite], [sqlite3])
AST_EXT_LIB_SETUP([SRTP], [Secure RTP], [srtp])
AST_EXT_LIB_SETUP_OPTIONAL([SRTP_256], [SRTP Library AES-256 (ICM)], [SRTP], [srtp])
AST_EXT_LIB_SETUP_OPTIONAL([SRTP_192], [SRTP Library AES-192 (ICM)], [SRTP], [srtp])
AST_EXT_LIB_SETUP_OPTIONAL([SRTP_GCM], [SRTP Library AES-128 (GCM) and AES-256 (GCM)], [SRTP], [srtp])
AST_EXT_LIB_SETUP_OPTIONAL([SRTP_SHUTDOWN], [SRTP Library Shutdown Function], [SRTP], [srtp])
AST_EXT_LIB_SETUP_OPTIONAL([SRTP_GET_VERSION], [SRTP Library Version Function], [SRTP], [srtp])
AST_EXT_LIB_SETUP_OPTIONAL([RT], [Realtime functions], [rt])
AST_EXT_LIB_SETUP([FREETDS], [FreeTDS], [tds])
AST_EXT_LIB_SETUP([TIMERFD], [timerfd], [timerfd])
AST_EXT_LIB_SETUP([TONEZONE], [tonezone], [tonezone])
AST_EXT_LIB_SETUP([UNBOUND], [unbound], [unbound])
AST_EXT_LIB_SETUP([UNIXODBC], [unixODBC], [unixodbc])
AST_EXT_LIB_SETUP([VORBIS], [Vorbis], [vorbis])
AST_EXT_LIB_SETUP([X11], [X11], [x11])
AST_EXT_LIB_SETUP([ZLIB], [zlib compression], [z])

# check for basic system features and functionality before
# checking for package libraries

AC_FUNC_ALLOCA
AC_HEADER_DIRENT
if test -z $ac_header_dirent -o "$ac_header_dirent" = "no"; then
  AC_MSG_ERROR([*** Could not find dirent header that defines 'DIR'.])
fi

AC_HEADER_SYS_WAIT
if test "$ac_cv_header_sys_wait_h" != "yes"; then
  AC_MSG_ERROR([*** POSIX.1 compatible sys/wait.h is required.])
fi

AC_HEADER_RESOLV
if test "$ac_cv_header_resolv_h" != "yes"; then
  AC_MSG_ERROR([*** resolv.h is required.])
fi

# Check for headers that are unconditionally required on all platforms.  Do not use
# this to check for headers that are only needed by modules.
AC_CHECK_HEADERS([ \
  arpa/nameser.h assert.h ctype.h dlfcn.h errno.h fcntl.h float.h grp.h \
  inttypes.h limits.h locale.h math.h pwd.h netinet/in.h regex.h \
  sched.h stdarg.h stdint.h stdio.h stdlib.h string.h syslog.h \
  sys/file.h sys/ioctl.h sys/param.h sys/resource.h sys/socket.h sys/stat.h \
  sys/time.h sys/types.h sys/un.h \
  termios.h time.h unistd.h \
], [], [
  AC_MSG_ERROR([*** A required header was not found.])
])

AC_CHECK_HEADERS([arpa/inet.h libintl.h malloc.h netdb.h stddef.h strings.h sys/event.h utime.h])

# Find required NetBSD Editline library (libedit).
AST_PKG_CONFIG_CHECK(LIBEDIT, libedit)
# some platforms do not list libedit via pkg-config, for example OpenBSD 6.2
AST_EXT_LIB_CHECK([LIBEDIT], [edit], [history_init], [histedit.h], [-ltermcap])
if test "${PBX_LIBEDIT}" != 1; then
	AC_MSG_ERROR(*** Please install the 'libedit' development package.)
	exit 1
fi
AST_C_COMPILE_CHECK([LIBEDIT_IS_UNICODE], [el_rfunc_t *callback;], [histedit.h], [], [Testing for libedit unicode support])

# Find required UUID support.
#  * -luuid on Linux
#  * -le2fs-uuid on OpenBSD
#  * in libsystem on OS X
AST_EXT_LIB_CHECK([LIBUUID], [uuid], [uuid_generate_random], [uuid/uuid.h])
if test "x$LIBUUID_LIB" != "x" ; then
  UUID_INCLUDE="$LIBUUID_INCLUDE"
  UUID_LIB="$LIBUUID_LIB"
else
  AST_EXT_LIB_CHECK([E2FSUUID], [e2fs-uuid], [uuid_generate_random], [uuid/uuid.h])
  if test "x$E2FSUUID_LIB" != "x" ; then
    UUID_INCLUDE="$E2FSUUID_INCLUDE"
    UUID_LIB="$E2FSUUID_LIB"
  else
    AC_CHECK_FUNCS([uuid_generate_random], [SYSUUID=true], [SYSUUID=""])
    if test "x$SYSUUID" != "x" ; then
      UUID_INCLUDE=""
      UUID_LIB=""
    else
      AC_MSG_ERROR([*** uuid support not found (this typically means the uuid development package is missing)])
    fi
  fi
fi
AC_SUBST(UUID_INCLUDE)
AC_SUBST(UUID_LIB)

# Find required JSON support if bundled is not enabled.
if test "$JANSSON_BUNDLED" = "no" ; then
	AST_PKG_CONFIG_CHECK([JANSSON], [jansson >= 2.11])
	# json_sprintf is available in 2.11+
	AST_EXT_LIB_CHECK([JANSSON], [jansson], [json_sprintf], [jansson.h])

	if test "${PBX_JANSSON}" != 1; then
		AC_MSG_NOTICE(*** Asterisk requires libjansson >= 2.11 and no system copy was found.)
		AC_MSG_NOTICE(*** Please install the 'libjansson' development package or)
		AC_MSG_NOTICE(*** use './configure --with-jansson-bundled')
		exit 1
	fi
	JANSSON_DEFINE_JSON_INT()
else
	PBX_JANSSON=1
fi

# See if clock_gettime is in librt
AST_EXT_LIB_CHECK([RT], [rt], [clock_gettime], [])

AST_PKG_CONFIG_CHECK([LIBXML2], [libxml-2.0])
AST_EXT_TOOL_CHECK([LIBXML2], [xml2-config], , ,
        [#include <libxml/tree.h>
        #include <libxml/parser.h>],
        [LIBXML_TEST_VERSION])

if test "${PBX_LIBXML2}" != 1; then
	AC_MSG_NOTICE(*** The Asterisk menuselect tool requires the 'libxml2' development package.)
	AC_MSG_NOTICE(*** Please install the 'libxml2' development package.)
	exit 1
fi

AST_EXT_LIB_CHECK([URIPARSER], [uriparser], [uriParseUriA], [uriparser/Uri.h])

# Another mandatory item (unless it's explicitly disabled)
AC_ARG_ENABLE([xmldoc],
	[AS_HELP_STRING([--disable-xmldoc],
		[Explicitly disable XML documentation])],
	[case "${enableval}" in
		y|ye|yes) DISABLE_XMLDOC=no ;;
		n|no)  DISABLE_XMLDOC=yes ;;
		*) AC_MSG_ERROR(bad value ${enableval} for --disable-xmldoc)  ;;
	esac], [DISABLE_XMLDOC=no])

AC_SUBST([DISABLE_XMLDOC])
if test "${DISABLE_XMLDOC}" != "yes"; then
        AC_DEFINE([AST_XML_DOCS], 1, [Define to enable XML documentation.])
fi

AST_EXT_LIB_CHECK([LIBXSLT], [xslt], [xsltLoadStylesheetPI], [libxslt/xsltInternals.h], [${LIBXML2_LIB}], [${LIBXML2_INCLUDE}])
AST_EXT_LIB_CHECK([LIBXSLT_CLEANUP], [xslt], [xsltCleanupGlobals], [libxslt/xsltInternals.h], [${LIBXML2_LIB}], [${LIBXML2_INCLUDE}])

AC_ARG_ENABLE([permanent-dlopen],
	[AS_HELP_STRING([--enable-permanent-dlopen],
		[Enable when your libc has a permanent dlopen like musl])],
	[case "${enableval}" in
		y|ye|yes) PERMANENT_DLOPEN=yes ;;
		n|no)  PERMANENT_DLOPEN=no ;;
		*) AC_MSG_ERROR(bad value ${enableval} for --enable-permanent-dlopen)  ;;
	esac], [PERMANENT_DLOPEN=no])

AC_SUBST([PERMANENT_DLOPEN])
if test "${PERMANENT_DLOPEN}" = "yes"; then
	AC_DEFINE([HAVE_PERMANENT_DLOPEN], 1, [Define to support libc with permanent dlopen.])
fi

# some embedded systems omit internationalization (locale) support
AC_CHECK_HEADERS([xlocale.h])

AC_CHECK_HEADERS([winsock.h winsock2.h])

AC_CHECK_HEADER([sys/poll.h],
	 [],
     AC_DEFINE([AST_POLL_COMPAT], 1, [Define to 1 if internal poll should be used.]))

AC_SYS_LARGEFILE

# Checks for typedefs, structures, and compiler characteristics.
AC_HEADER_STDBOOL
AC_C_CONST
AC_TYPE_UID_T
AC_C_INLINE
AC_TYPE_LONG_DOUBLE_WIDER
AC_TYPE_MODE_T
AC_TYPE_OFF_T
AC_TYPE_PID_T
AC_TYPE_SIZE_T
AC_CHECK_MEMBERS([struct stat.st_blksize])
AC_CHECK_MEMBERS([struct ucred.uid, struct ucred.cr_uid, struct sockpeercred.uid], [], [], [#include <sys/types.h>
#include <sys/socket.h> ])
AC_CHECK_MEMBERS([struct ifreq.ifr_ifru.ifru_hwaddr], [], [], [#include <net/if.h>])
AC_HEADER_TIME
AC_STRUCT_TM
AC_C_VOLATILE
AC_CHECK_TYPES([ptrdiff_t])
stat_nsec_found=no
AC_CHECK_MEMBERS([struct stat.st_mtim, struct stat.st_mtimensec, struct stat.st_mtimespec], [stat_nsec_found=yes], [], [[#include <sys/stat.h>]])

if test "${stat_nsec_found}" != yes; then
	AC_MSG_WARN(Cannot determine nanosecond field of struct stat)
fi

# Checks for library functions.
AC_FUNC_CHOWN
AC_FUNC_CLOSEDIR_VOID
AC_FUNC_ERROR_AT_LINE
AST_FUNC_FORK
AC_FUNC_FSEEKO
AC_PROG_GCC_TRADITIONAL
# XXX: these are commented out until we determine whether it matters if our malloc()
# acts exactly like glibc's or not
# AC_FUNC_MALLOC
# AC_FUNC_REALLOC
AC_FUNC_MEMCMP
AC_FUNC_MMAP
AC_FUNC_SELECT_ARGTYPES
AC_FUNC_STAT
AC_FUNC_STRCOLL
AC_FUNC_STRFTIME
AC_FUNC_STRNLEN
AC_FUNC_STRTOD
AC_FUNC_UTIME_NULL
AC_FUNC_VPRINTF
AC_CHECK_FUNCS([asprintf atexit closefrom dup2 eaccess endpwent euidaccess ffsll ftruncate getcwd gethostbyname gethostname getloadavg gettimeofday glob ioperm inet_ntoa isascii memchr memmove memset mkdir mkdtemp munmap newlocale pipe2 ppoll putenv re_comp regcomp select setenv socket strcasecmp strcasestr strchr strcspn strdup strerror strlcat strlcpy strncasecmp strndup strnlen strrchr strsep strspn strstr strtod strtol strtold strtoq unsetenv uselocale utime vasprintf getpeereid sysctl swapctl malloc_trim])

AC_MSG_CHECKING(for htonll)
AC_LINK_IFELSE(
	[AC_LANG_PROGRAM([#include <arpa/inet.h>],
		[return htonll(0);])],
	AC_MSG_RESULT(yes)
	AC_DEFINE(HAVE_HTONLL, 1, [Define to 1 if arpa/inet.h includes a htonll definition.]),
	AC_MSG_RESULT(no)
)

AC_MSG_CHECKING(for ntohll)
AC_LINK_IFELSE(
	[AC_LANG_PROGRAM([#include <arpa/inet.h>],
		[return ntohll(0);])],
	AC_MSG_RESULT(yes)
	AC_DEFINE(HAVE_NTOHLL, 1, [Define to 1 if arpa/inet.h includes a ntohll definition.]),
	AC_MSG_RESULT(no)
)

# NOTE: we use AC_CHECK_LIB to get -lm into the arguments for later checks,
# so that AC_CHECK_FUNCS can detect functions in that library.
AC_CHECK_LIB([m], [sqrt])
# BSD might not have exp2, and/or log2
AC_CHECK_FUNCS([exp2 log2 exp10 log10 sin cos tan asin acos atan atan2 pow rint exp log remainder fmod round roundf trunc floor ceil])

# Certain architectures don't really have long double, even though
# AC_CHECK_FUNCS would otherwise find the following functions.
if test "x${ac_cv_type_long_double_wider}" = "xyes" ; then
	AC_CHECK_FUNCS([exp2l log2l exp10l log10l sinl cosl tanl asinl acosl atanl atan2l powl sqrtl rintl expl logl remainderl fmodl roundl truncl floorl ceill])
fi

AC_MSG_CHECKING(for LLONG_MAX in limits.h)
AC_LINK_IFELSE(
	[AC_LANG_PROGRAM([#include <limits.h>],
		[long long foo = LLONG_MAX])],
	AC_MSG_RESULT(yes)
	AC_DEFINE([HAVE_LLONG_MAX], 1, [Define to 1 if limits.h includes a LLONG_MAX definition.]),
	AC_MSG_RESULT(no)
)

AC_MSG_CHECKING(for timersub in time.h)
AC_LINK_IFELSE(
	[AC_LANG_PROGRAM([#include <sys/time.h>],
		[struct timeval *a; timersub(a, a, a);])],
	AC_MSG_RESULT(yes)
		AC_DEFINE([HAVE_TIMERSUB], 1, [Define to 1 if your system defines timersub.]),
	AC_MSG_RESULT(no)
)

AC_MSG_CHECKING(for a version of GNU ld that supports the --dynamic-list flag)
old_LDFLAGS=${LDFLAGS}
cat >conftest.dynamics <<_ACEOF
{
	*ast_*;
};
_ACEOF
LDFLAGS="${LDFLAGS} -Wl,--dynamic-list,conftest.dynamics"
PBX_DYNAMIC_LIST=0
AC_LINK_IFELSE(
	[AC_LANG_PROGRAM([], [])],
	PBX_DYNAMIC_LIST=1
	AC_MSG_RESULT(yes),
	AC_MSG_RESULT(no)
)
AC_SUBST(PBX_DYNAMIC_LIST)
LDFLAGS=${old_LDFLAGS}
rm -f conftest.dynamics

AC_CHECK_HEADER([sys/poll.h],
   [HAS_POLL=1]
   AC_DEFINE([HAVE_SYS_POLL_H], 1, [Define to 1 if your system has working sys/poll.h]),
   )

AC_ARG_ENABLE([internal-poll],
	[AS_HELP_STRING([--enable-internal-poll],
		[Use Asterisk's poll implementation])],
	[case "${enableval}" in
		y|ye|yes) HAS_POLL="";;
		n|no) HAS_POLL="${HAS_POLL}" ;;
		*) AC_MSG_ERROR(bad value ${enableval} for --enable-internal-poll) ;;
	esac])
AC_SUBST(HAS_POLL)

AC_ARG_ENABLE([asteriskssl],
	[AS_HELP_STRING([--disable-asteriskssl],
		[Disable Asterisk's SSL wrapper library])],
	[case "${enableval}" in
		y|ye|yes) AST_ASTERISKSSL=yes ;;
		n|no)  AST_ASTERISKSSL=no ;;
		*) AC_MSG_ERROR(bad value ${enableval} for --disable-asteriskssl)  ;;
	esac], [AST_ASTERISKSSL=yes])
AC_SUBST(AST_ASTERISKSSL)

AC_CHECK_FUNCS([inet_aton])

# check if we have IP_PKTINFO constant defined
AC_MSG_CHECKING(for IP_PKTINFO)
AC_LINK_IFELSE(
		[AC_LANG_PROGRAM([#include <netinet/in.h>],
						[int pi = IP_PKTINFO;])],
		AC_MSG_RESULT(yes)
		AC_DEFINE([HAVE_PKTINFO], 1, [Define to 1 if your system defines IP_PKTINFO.]),
		AC_MSG_RESULT(no)
)

# NetBSD libc ships with an internal-only incompatible symbol gethostbyname_r
AC_CHECK_DECLS([gethostbyname_r],
        [have_gethostbyname_r_public_declaration=yes],
        [have_gethostbyname_r_public_declaration=no],
        [#include <stdlib.h>
         #include <netdb.h>]
)

if test "x$have_gethostbyname_r_public_declaration" = "xyes"; then
        # some systems already have gethostbyname_r so we don't need to build ours in main/utils.c
        AC_SEARCH_LIBS(gethostbyname_r, [socket nsl])

        AC_MSG_CHECKING(for gethostbyname_r with 6 arguments)
        AC_LINK_IFELSE(
                [AC_LANG_PROGRAM([#include <stdlib.h>
                                 #include <netdb.h>],
                                [struct hostent *he = gethostbyname_r((const char *)NULL, (struct hostent *)NULL, (char *)NULL, (int)0, (struct hostent **)NULL, (int *)NULL);])],
                AC_MSG_RESULT(yes)
                AC_DEFINE([HAVE_GETHOSTBYNAME_R_6], 1, [Define to 1 if your system has gethostbyname_r with 6 arguments.]),
                AC_MSG_RESULT(no)
        )

        AC_MSG_CHECKING(for gethostbyname_r with 5 arguments)
        AC_LINK_IFELSE(
                [AC_LANG_PROGRAM([#include <stdlib.h>
	                         #include <netdb.h>],
                                [struct hostent *he = gethostbyname_r((const char *)NULL, (struct hostent *)NULL, (char *)NULL, (int)0, (int *)NULL);])],
                AC_MSG_RESULT(yes)
                AC_DEFINE([HAVE_GETHOSTBYNAME_R_5], 1, [Define to 1 if your system has gethostbyname_r with 5 arguments.]),
                AC_MSG_RESULT(no)
        )
fi

AC_CHECK_HEADER([byteswap.h], [AC_DEFINE_UNQUOTED([HAVE_BYTESWAP_H], 1, [Define to 1 if byteswap.h macros are available.])])

AC_MSG_CHECKING(for __swap16 variant of <sys/endian.h> byteswapping macros)
AC_LINK_IFELSE(
[AC_LANG_PROGRAM([#include <sys/endian.h>], [int a = 1; int b = __swap16(a);])],
AC_MSG_RESULT(yes)
AC_DEFINE([HAVE_SYS_ENDIAN_SWAP16], 1, [Define to 1 if your sys/endian.h header file provides the __swap16 macro.]),
AC_MSG_RESULT(no)
)

AC_MSG_CHECKING(for bswap16 variant of <sys/endian.h> byteswapping macros)
AC_LINK_IFELSE(
[AC_LANG_PROGRAM([#include <sys/endian.h>], [int a = 1; int b = bswap16(a);])],
AC_MSG_RESULT(yes)
AC_DEFINE([HAVE_SYS_ENDIAN_BSWAP16], 1, [Define to 1 if your sys/endian.h header file provides the bswap16 macro.]),
AC_MSG_RESULT(no)
)