configure.ac

# Process this file with autoconf to produce a configure script.
#
# Make sure we use autoconf 2.60 to generate the "configure" script,
# in case we want to commit it. Other than that, version 2.59 is
# perfectly fine for our purposes, so people who want to modify
# this file just have to remember to set the AC_PREREQ argument
# to something that suits their needs.

AC_PREREQ(2.60)

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_CONFIG_AUX_DIR(`pwd`)

AC_COPYRIGHT("Asterisk")
AC_REVISION($Revision$)

# 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],        ['${sbindir}'])dnl
AC_SUBST([astetcdir],         ['${sysconfdir}/asterisk'])dnl
AC_SUBST([astheaderdir],      ['${includedir}/asterisk'])dnl
AC_SUBST([astlibdir],         ['${libdir}/asterisk'])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
     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
        astlibdir='/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
        astetcdir=/var/etc/asterisk
        astsbindir=/opt/asterisk/sbin
        astlibdir=/opt/asterisk/lib
        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

# $HOME is preferred as our substitute path, unless $HOME contains a space
for i in ${HOME} /tmp; do
	if test "${i}" = ""; then continue; fi
	if test "${i}" = "/"; then continue; fi
	__ac_path_has_spaces=`echo $HOME | grep ' '`
	if test "$ac_path_has_spaces" = ""; then :; else continue; fi
	__ac_substitute_path=${i}
	break
done

AC_PROG_LN_S
__sub_ordinal=1
MAKE_PREINSTALL=""
MAKE_POSTINSTALL=""

# It may initially seem a trifle bit excessive to evaluate all of these paths.
# However, consider that many of these may invoke another variable, such as
# ${prefix}, by default, which is not resolved until compile time.  If that
# variable contains a space, then each of the dependent variables will also
# contain a space and thus will need the special treatment.
for stdpath in prefix exec_prefix datarootdir datadir includedir infodir libdir libexecdir localstatedir mandir sbindir sharedstatedir sysconfdir astetcdir astsbindir astlibdir astheaderdir astmandir astvarlibdir astspooldir astlogdir astvarrundir astdatadir astdbdir astkeydir; do
	eval "__ac_path_sub=\${$stdpath}"
	#echo "__ac_path_sub=$__ac_path_sub"
	__ac_path_has_var=`sh -c "echo '$__ac_path_sub' | grep '{'"`
	if test "$__ac_path_has_var" = ""; then :; else
		__ac_path_sub=`echo $__ac_path_sub | sed 's/{/{MAKE_/'`
	fi

	__ac_path_has_spaces=`sh -c "echo '$__ac_path_sub' | grep ' '"`
	if test "$__ac_path_has_spaces" = ""; then
		eval "MAKE_$stdpath=\$__ac_path_sub"
	else
		# Substitute path for a path without a space
		eval "MAKE_$stdpath=\"$__ac_substitute_path/.asterisk_install_path_${__sub_ordinal}\""
		MAKE_POSTINSTALL="${MAKE_POSTINSTALL} rm -f \"$__ac_substitute_path/.asterisk_install_path_${__sub_ordinal}\";"
		MAKE_PREINSTALL="${MAKE_PREINSTALL} rm -f \"$__ac_substitute_path/.asterisk_install_path_${__sub_ordinal}\";"
		MAKE_PREINSTALL="${MAKE_PREINSTALL} ${LN_S} -f \"\$(DESTDIR)$__ac_path_sub\" \"$__ac_substitute_path/.asterisk_install_path_${__sub_ordinal}\";"
		__sub_ordinal=$((${__sub_ordinal}+1))
	fi
done
AC_SUBST(MAKE_PREINSTALL)
AC_SUBST(MAKE_POSTINSTALL)
AC_SUBST(MAKE_prefix)
AC_SUBST(MAKE_exec_prefix)
AC_SUBST(MAKE_datarootdir)
AC_SUBST(MAKE_datadir)
AC_SUBST(MAKE_includedir)
AC_SUBST(MAKE_infodir)
AC_SUBST(MAKE_libdir)
AC_SUBST(MAKE_libexecdir)
AC_SUBST(MAKE_localstatedir)
AC_SUBST(MAKE_mandir)
AC_SUBST(MAKE_sbindir)
AC_SUBST(MAKE_sharedstatedir)
AC_SUBST(MAKE_sysconfdir)
AC_SUBST(MAKE_astetcdir)
AC_SUBST(MAKE_astsbindir)
AC_SUBST(MAKE_astlibdir)
AC_SUBST(MAKE_astheaderdir)
AC_SUBST(MAKE_astmandir)
AC_SUBST(MAKE_astvarlibdir)
AC_SUBST(MAKE_astspooldir)
AC_SUBST(MAKE_astlogdir)
AC_SUBST(MAKE_astvarrundir)
AC_SUBST(MAKE_astdatadir)
AC_SUBST(MAKE_astdbdir)
AC_SUBST(MAKE_astkeydir)

test "x$MAKE_prefix" = xNONE && MAKE_prefix=$ac_default_prefix
# Let make expand exec_prefix.
test "x$MAKE_exec_prefix" = xNONE && MAKE_exec_prefix='${prefix}'

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

AC_SUBST(OSARCH)
AC_SUBST(PBX_WINARCH)

#  check for uname
AC_PATH_TOOL([UNAME], [uname], No)
if test ! x"${UNAME}" = xNo; then
   PBX_OSREV=$(${UNAME} -r)
fi
AC_SUBST(PBX_OSREV)

AH_TOP(
#ifndef ASTERISK_AUTOCONFIG_H
#define ASTERISK_AUTOCONFIG_H

#include "asterisk/buildopts.h"

)

AH_BOTTOM(
#endif
)

# 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, :)
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_RANLIB
AST_CHECK_GNU_MAKE
AC_PROG_EGREP

AC_CHECK_TOOLS([STRIP], [strip gstrip], :)
AC_CHECK_TOOLS([AR], [ar gar], :)
AC_CHECK_TOOLS([SHA1SUM], [sha1sum], $ac_aux_dir/build_tools/sha1sum-sh)
AC_CHECK_TOOLS([OPENSSL], [openssl], :)

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([FLEX], [flex], :)
AC_PATH_PROG([GREP], [grep], :)
AC_PATH_PROG([FIND], [find], :)
AC_PATH_PROG([COMPRESS], [compress], :)
AC_PATH_PROG([BASENAME], [basename], :)
AC_PATH_PROG([DIRNAME], [dirname], :)
AC_PATH_PROG([SHELL], [sh], :)
AC_PATH_PROG([LN], [ln], :)
AC_PATH_PROG([DOT], [dot], :)
AC_PATH_PROG([WGET], [wget], :)
AC_PATH_PROG([CURL], [curl], :)
AC_PATH_PROG([RUBBER], [rubber], :)
AC_PATH_PROG([CATDVI], [catdvi], :)
AC_PATH_PROG([KPATHSEA], [kpsewhich], :)
AC_PATH_PROG([XMLLINT], [xmllint], :)
AC_PATH_PROG([XMLSTARLET], [xmlstarlet], :)
if test "${WGET}" != ":" ; then
  DOWNLOAD=${WGET}
else if test "${CURL}" != ":" ; then
  DOWNLOAD="${CURL} -O --progress-bar -w \"%{url_effective}\n\""
else
  AC_PATH_PROG([FETCH], [fetch], [:])
  DOWNLOAD=${FETCH}
fi
fi
AC_SUBST(DOWNLOAD)

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

AC_CHECK_TOOL([SOXMIX], [soxmix], [:])
if test "${SOXMIX}" != ":" ; 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

ACX_PTHREAD

AC_LANG(C)

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
	      ;;
	      *) AC_MSG_ERROR(bad value ${enableval} for --enable-dev-mode)  ;;
	esac])
AC_SUBST(NOISY_BUILD)
AC_SUBST(AST_DEVMODE)

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_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([CURSES], [curses], [curses])
AST_EXT_LIB_SETUP([CRYPTO], [OpenSSL Cryptography], [crypto])
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([GTK2], [gtk2], [gtk2])
AST_EXT_LIB_SETUP([GMIME], [GMime], [gmime])
AST_EXT_LIB_SETUP([OPENH323], [OpenH323], [h323])
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([ISDNNET], [ISDN4Linux], [isdnnet])
AST_EXT_LIB_SETUP([JACK], [Jack Audio Connection Kit], [jack])
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([LIBXML2], [LibXML2], [libxml2])
AST_EXT_LIB_SETUP([LTDL], [libtool], [ltdl])
AST_EXT_LIB_SETUP([LUA], [Lua], [lua])
AST_EXT_LIB_SETUP([MISDN], [mISDN user], [misdn])
AST_EXT_LIB_SETUP([MYSQLCLIENT], [MySQL client], [mysqlclient])
AST_EXT_LIB_SETUP([NBS], [Network Broadcast Sound], [nbs])
AST_EXT_LIB_SETUP([NCURSES], [ncurses], [ncurses])
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([OPENAIS], [OpenAIS], [openais])
AST_EXT_LIB_SETUP([OPENR2], [MFR2], [openr2])
AST_EXT_LIB_SETUP([OSPTK], [OSP Toolkit], [osptk])
AST_EXT_LIB_SETUP([OSS], [Open Sound System], [oss])
AST_EXT_LIB_SETUP([PGSQL], [PostgreSQL], [postgres])
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_DEPENDENT([PRI_L2_PERSISTENCE], [ISDN Layer 2 persistence option], [PRI], [pri])
AST_EXT_LIB_SETUP_DEPENDENT([PRI_DATETIME_SEND], [ISDN PRI Date/time ie send policy], [PRI], [pri])
AST_EXT_LIB_SETUP_DEPENDENT([PRI_MWI_V2], [ISDN PRI Message Waiting Indication (Fixed)], [PRI], [pri])
AST_EXT_LIB_SETUP_DEPENDENT([PRI_DISPLAY_TEXT], [ISDN PRI user display text IE contents during call], [PRI], [pri])
AST_EXT_LIB_SETUP_DEPENDENT([PRI_MWI], [ISDN PRI Message Waiting Indication], [PRI], [pri])
AST_EXT_LIB_SETUP_DEPENDENT([PRI_MCID], [ISDN PRI Malicious Call ID], [PRI], [pri])
AST_EXT_LIB_SETUP_DEPENDENT([PRI_CALL_WAITING], [ISDN PRI call waiting supplementary service], [PRI], [pri])
AST_EXT_LIB_SETUP_DEPENDENT([PRI_AOC_EVENTS], [ISDN PRI advice of charge supplementary service events], [PRI], [pri])
AST_EXT_LIB_SETUP_DEPENDENT([PRI_TRANSFER], [ISDN PRI call transfer supplementary service], [PRI], [pri])
AST_EXT_LIB_SETUP_DEPENDENT([PRI_CCSS], [ISDN PRI call completion supplementary service], [PRI], [pri])
AST_EXT_LIB_SETUP_DEPENDENT([PRI_HANGUP_FIX], [ISDN PRI hangup fix], [PRI], [pri])
AST_EXT_LIB_SETUP_DEPENDENT([PRI_SUBADDR], [ISDN PRI subaddressing], [PRI], [pri])
AST_EXT_LIB_SETUP_DEPENDENT([PRI_CALL_HOLD], [ISDN PRI call hold], [PRI], [pri])
AST_EXT_LIB_SETUP_DEPENDENT([PRI_CALL_REROUTING], [ISDN PRI call rerouting and call deflection], [PRI], [pri])
AST_EXT_LIB_SETUP_DEPENDENT([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_DEPENDENT([PRI_INBANDDISCONNECT], [ISDN PRI set_inbanddisconnect], [PRI], [pri])
AST_EXT_LIB_SETUP_DEPENDENT([PRI_PROG_W_CAUSE], [ISDN progress with cause], [PRI], [pri])
AST_EXT_LIB_SETUP_DEPENDENT([PRI_SERVICE_MESSAGES], [ISDN service messages], [PRI], [pri])
AST_EXT_LIB_SETUP_DEPENDENT([PRI_REVERSE_CHARGE], [ISDN reverse charge], [PRI], [pri])
# ------------------------------------^
AST_EXT_LIB_SETUP([PWLIB], [PWlib], [pwlib])
AST_EXT_LIB_SETUP([RADIUS], [Radius Client], [radius])
AST_EXT_LIB_SETUP([RESAMPLE], [LIBRESAMPLE], [resample])
AST_EXT_LIB_SETUP([SDL], [Sdl], [sdl])
AST_EXT_LIB_SETUP([SDL_IMAGE], [Sdl Image], [SDL_image])
AST_OPTION_ONLY([sounds-cache], [SOUNDS_CACHE_DIR], [cached sound tarfiles], [])
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([SQLITE], [SQLite], [sqlite])
AST_EXT_LIB_SETUP([SQLITE3], [SQLite], [sqlite3])
AST_EXT_LIB_SETUP([SRTP], [Secure RTP], [srtp])
AST_EXT_LIB_SETUP([OPENSSL], [OpenSSL Secure Sockets Layer], [ssl])
AST_EXT_LIB_SETUP([SUPPSERV], [mISDN Supplemental Services], [suppserv])
AST_EXT_LIB_SETUP([FREETDS], [FreeTDS], [tds])
AST_EXT_LIB_SETUP([TERMCAP], [Termcap], [termcap])
AST_EXT_LIB_SETUP([TIMERFD], [timerfd], [timerfd])
AST_EXT_LIB_SETUP([TINFO], [Term Info], [tinfo])
AST_EXT_LIB_SETUP([TONEZONE], [tonezone], [tonezone])
AST_EXT_LIB_SETUP([UNIXODBC], [unixODBC], [unixodbc])
AST_EXT_LIB_SETUP([USB], [usb], [usb])
AST_EXT_LIB_SETUP([VORBIS], [Vorbis], [vorbis])
AST_EXT_LIB_SETUP([VPB], [Voicetronix API], [vpb])
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
AC_HEADER_STDC
AC_HEADER_SYS_WAIT
AC_CHECK_HEADERS([arpa/inet.h fcntl.h inttypes.h libintl.h limits.h locale.h malloc.h netdb.h netinet/in.h stddef.h stdint.h stdlib.h string.h strings.h sys/event.h sys/file.h sys/ioctl.h sys/param.h sys/socket.h sys/time.h syslog.h termios.h unistd.h utime.h arpa/nameser.h sys/io.h])

# 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], [], [], [#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])

# 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_SETVBUF_REVERSED
AC_TYPE_SIGNAL
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 htonll ioperm inet_ntoa isascii memchr memmove memset mkdir mkdtemp munmap ntohll newlocale 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 utime vasprintf getpeereid sysctl swapctl])

# 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 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)



# https support (in main/http.c) uses funopen on BSD systems,
# fopencookie on linux
AC_CHECK_FUNCS([funopen fopencookie])

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)
)

# 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)
)

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)
)

if test "${cross_compiling}" = "no";
then
  AC_CHECK_FILE(/dev/urandom, AC_DEFINE([HAVE_DEV_URANDOM], 1, [Define to 1 if your system has /dev/urandom.]))
fi

AC_MSG_CHECKING(for locale_t in locale.h)
AC_LINK_IFELSE(
AC_LANG_PROGRAM([#include <locale.h>], [locale_t lt = NULL]),
AC_MSG_RESULT(yes)
AC_DEFINE([HAVE_LOCALE_T_IN_LOCALE_H], 1, [Define to 1 if your system defines the locale_t type in locale.h]),
AC_MSG_RESULT(no)
  AC_MSG_CHECKING(for locale_t in xlocale.h)
  AC_LINK_IFELSE(
  AC_LANG_PROGRAM([#include <xlocale.h>], [locale_t lt = NULL]),
  AC_MSG_RESULT(yes)
  AC_DEFINE([HAVE_LOCALE_T_IN_XLOCALE_H], 1, [Define to 1 if your system defines the locale_t type in xlocale.h]),
  AC_MSG_RESULT(no)
  )
)

AC_MSG_CHECKING(for O_EVTONLY in fcntl.h)
AC_LINK_IFELSE(
AC_LANG_PROGRAM([#include <fcntl.h>], [int a = O_EVTONLY;]),
AC_MSG_RESULT(yes)
AC_DEFINE([HAVE_O_EVTONLY], 1, [Define to 1 if your system defines the file flag O_EVTONLY in fcntl.h]),
AC_MSG_RESULT(no)
)

AC_MSG_CHECKING(for O_SYMLINK in fcntl.h)
AC_LINK_IFELSE(
AC_LANG_PROGRAM([#include <fcntl.h>], [int a = O_SYMLINK;]),
AC_MSG_RESULT(yes)
AC_DEFINE([HAVE_O_SYMLINK], 1, [Define to 1 if your system defines the file flag O_SYMLINK in fcntl.h]),
AC_MSG_RESULT(no)
)

AST_C_DEFINE_CHECK([PTHREAD_RWLOCK_INITIALIZER], [PTHREAD_RWLOCK_INITIALIZER], [pthread.h])

AC_MSG_CHECKING(for PTHREAD_RWLOCK_PREFER_WRITER_NP in pthread.h)
AC_LINK_IFELSE(
AC_LANG_PROGRAM([#include <pthread.h>], [int a = PTHREAD_RWLOCK_PREFER_WRITER_NP;]),
AC_MSG_RESULT(yes)
AC_DEFINE([HAVE_PTHREAD_RWLOCK_PREFER_WRITER_NP], 1, [Define to 1 if your system defines PTHREAD_RWLOCK_PREFER_WRITER_NP in pthread.h]),
AC_MSG_RESULT(no)
)

AC_MSG_CHECKING(for PTHREAD_MUTEX_RECURSIVE_NP in pthread.h)
AC_LINK_IFELSE(
AC_LANG_PROGRAM([#include <pthread.h>], [int a = PTHREAD_MUTEX_RECURSIVE_NP;]),
AC_MSG_RESULT(yes)
AC_DEFINE([HAVE_PTHREAD_MUTEX_RECURSIVE_NP], 1, [Define to 1 if your system defines PTHREAD_MUTEX_RECURSIVE_NP in pthread.h]),
AC_MSG_RESULT(no)
)

AC_MSG_CHECKING(for pthread_rwlock_timedwrlock() in pthread.h)
save_LIBS="$LIBS"
save_CFLAGS="$CFLAGS"
LIBS="$PTHREAD_LIBS $LIBS"
CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
AC_LINK_IFELSE(
  [AC_LANG_PROGRAM(
    [#include <pthread.h>
     #include <time.h>],
    [pthread_rwlock_t foo; struct timespec bar; pthread_rwlock_timedwrlock(&foo, &bar)])
  ],[
    AC_MSG_RESULT(yes)
    ac_cv_pthread_rwlock_timedwrlock="yes"
  ],[
    AC_MSG_RESULT(no)
    ac_cv_pthread_rwlock_timedwrlock="no"
  ]
)
LIBS="$save_LIBS"
CFLAGS="$save_CFLAGS"
if test "${ac_cv_pthread_rwlock_timedwrlock}" = "yes"; then
  AC_DEFINE([HAVE_PTHREAD_RWLOCK_TIMEDWRLOCK], 1, [Define if your system has pthread_rwlock_timedwrlock()])
fi

AC_MSG_CHECKING(if PTHREAD_ONCE_INIT needs braces)
saved_CFLAGS="${CFLAGS}"
CFLAGS="${CFLAGS} -Werror -Wmissing-braces"
AC_COMPILE_IFELSE(
  [AC_LANG_PROGRAM(
    [#include <pthread.h>
     void empty(){}],
	[pthread_once_t once = PTHREAD_ONCE_INIT; pthread_once(&once, empty);])
  ],[
    AC_MSG_RESULT(no)
    ac_cv_pthread_once_needsbraces="no"
  ],[
    AC_MSG_RESULT(yes)
    ac_cv_pthread_once_needsbraces="yes"
  ]
)
CFLAGS="${saved_CFLAGS}"
if test "${ac_cv_pthread_once_needsbraces}" = "yes"; then
  AC_DEFINE([PTHREAD_ONCE_INIT_NEEDS_BRACES], 1, [Define if your system needs braces around PTHREAD_ONCE_INIT])
fi

AST_C_DEFINE_CHECK([PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP], [PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP], [pthread.h])

# Can we compare a mutex to its initial value?
# Generally yes on OpenBSD/FreeBSD and no on Mac OS X.
AC_MSG_CHECKING(whether we can compare a mutex to its initial value)
AC_LINK_IFELSE(
	AC_LANG_PROGRAM([#include <pthread.h>], [pthread_mutex_t lock;
	if ((lock) != ((pthread_mutex_t) PTHREAD_MUTEX_INITIALIZER)) {
		return 0;
	}
	return 0]),
	AC_MSG_RESULT(yes)
	AC_DEFINE([CAN_COMPARE_MUTEX_TO_INIT_VALUE], 1, [Define to 1 if your system's implementation of mutexes supports comparison of a mutex to its initializer.]),
	AC_MSG_RESULT(no)
)

#if test "${cross_compiling}" = "no";
#then
#AC_MSG_CHECKING(for working epoll support)
#AC_LINK_IFELSE(
#AC_LANG_PROGRAM([#include <sys/epoll.h>], [int res = epoll_create(10);
#					  if (res < 0)
#					     return 1;
#					  close (res);
#					  return 0;]),
#AC_MSG_RESULT(yes)
#AC_DEFINE([HAVE_EPOLL], 1, [Define to 1 if your system has working epoll support.]),
#AC_MSG_RESULT(no)
#)
#fi

# for FreeBSD thr_self
AC_CHECK_HEADERS([sys/thr.h])

AC_MSG_CHECKING(for compiler atomic operations)
AC_LINK_IFELSE(
AC_LANG_PROGRAM([], [int foo1; int foo2 = __sync_fetch_and_add(&foo1, 1);]),
AC_MSG_RESULT(yes)
AC_DEFINE([HAVE_GCC_ATOMICS], 1, [Define to 1 if your GCC C compiler provides atomic operations.]),
AC_MSG_RESULT(no)
)

# glibc, AFAIK, is the only C library that makes printing a NULL to a string safe.
AC_MSG_CHECKING([if your system printf is NULL-safe.])
AC_RUN_IFELSE(
	AC_LANG_PROGRAM([#include <stdio.h>],
		[printf("%s", NULL)]),
	AC_DEFINE([HAVE_NULLSAFE_PRINTF], 1, [Define to 1 if your C library can safely print NULL to string formats.])
	AC_MSG_RESULT(yes),
	AC_MSG_RESULT(no),
	# It's unlikely an embedded system will have this.
	AC_MSG_RESULT(unknown)
)

AC_MSG_CHECKING(if we can increase the maximum select-able file descriptor)
AC_RUN_IFELSE(
AC_LANG_PROGRAM([
#include <stdio.h>
#include <sys/select.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <string.h>
#include <errno.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
], [[
	struct rlimit rlim = { FD_SETSIZE * 2, FD_SETSIZE * 2 };
	int fd0, fd1;
	struct timeval tv = { 0, };
	struct ast_fdset { long fds_bits[[1024]]; } fds = { { 0, } };
	if (setrlimit(RLIMIT_NOFILE, &rlim)) { exit(1); }
	if ((fd0 = open("/dev/null", O_RDONLY)) < 0) { exit(1); }
	if (dup2(fd0, (fd1 = FD_SETSIZE + 1)) < 0) { exit(1); }
	FD_SET(fd0, (fd_set *) &fds);
	FD_SET(fd1, (fd_set *) &fds);
	if (select(FD_SETSIZE + 2, (fd_set *) &fds, NULL, NULL, &tv) < 0) { exit(1); }
	exit(0)]]),
	AC_MSG_RESULT(yes)
	AC_DEFINE([HAVE_VARIABLE_FDSET], 1, [Define to 1 if your system can support larger than default select bitmasks.]),
	AC_MSG_RESULT(no),
	AC_MSG_RESULT(cross-compile)
)

if test "${ac_cv_have_variable_fdset}x" = "0x"; then
	AC_RUN_IFELSE(
		AC_LANG_PROGRAM([
#include <unistd.h>
#include <sys/types.h>
#include <stdlib.h>
], [if (getuid() != 0) { exit(1); }]),
		AC_DEFINE([CONFIGURE_RAN_AS_ROOT], 1, [Some configure tests will unexpectedly fail if configure is run by a non-root user.  These may be able to be tested at runtime.]))
fi

AST_GCC_ATTRIBUTE(pure)
AST_GCC_ATTRIBUTE(malloc)
AST_GCC_ATTRIBUTE(const)
AST_GCC_ATTRIBUTE(unused)
AST_GCC_ATTRIBUTE(always_inline)
AST_GCC_ATTRIBUTE(deprecated)
AST_GCC_ATTRIBUTE(sentinel)
AST_GCC_ATTRIBUTE(warn_unused_result)
AST_GCC_ATTRIBUTE(weak_import, [], [], PBX_WEAKREF)
AST_GCC_ATTRIBUTE(weakref, [weakref("foo")], static, PBX_WEAKREF)

AC_MSG_CHECKING(for -ffunction-sections support)
saved_CFLAGS="${CFLAGS}"
CFLAGS="${CFLAGS} -ffunction-sections"
AC_COMPILE_IFELSE(
	AC_LANG_PROGRAM([], [int x = 1;]),
	AC_MSG_RESULT(yes)
	[saved_LDFLAGS="${LDFLAGS}"]
	[LDFLAGS="${LDFLAGS} -Wl,--gc-sections"]
	AC_MSG_CHECKING(for --gc-sections support)
	AC_LINK_IFELSE(
		AC_LANG_PROGRAM([], [int x = 1;]),
		AC_MSG_RESULT(yes)
		[GC_CFLAGS="-ffunction-sections"]
		[[GC_LDFLAGS="-Wl,--gc-sections"]],
		AC_MSG_RESULT(no)
	)
	[LDFLAGS="${saved_LDFLAGS}"],
	AC_MSG_RESULT(no)
)
CFLAGS="${saved_CFLAGS}"
AC_SUBST(GC_CFLAGS)
AC_SUBST(GC_LDFLAGS)

AC_MSG_CHECKING(for -Wdeclaration-after-statement support)
if $(${CC} -Wdeclaration-after-statement -S -o /dev/null -xc /dev/null > /dev/null 2>&1); then
	AC_MSG_RESULT(yes)
	AST_DECLARATION_AFTER_STATEMENT=-Wdeclaration-after-statement
else
	AC_MSG_RESULT(no)
	AST_DECLARATION_AFTER_STATEMENT=
fi
AC_SUBST(AST_DECLARATION_AFTER_STATEMENT)

AC_MSG_CHECKING(for _FORTIFY_SOURCE support)
if $(${CC} -D_FORTIFY_SOURCE=2 -S -o /dev/null -xc /dev/null > /dev/null 2>&1); then
	AC_MSG_RESULT(yes)
	AST_FORTIFY_SOURCE=-D_FORTIFY_SOURCE=2
else
	AC_MSG_RESULT(no)
	AST_FORTIFY_SOURCE=
fi
AC_SUBST(AST_FORTIFY_SOURCE)

AC_MSG_CHECKING(for -fno-strict-overflow)
if $(${CC} -O2 -fno-strict-overflow -S -o /dev/null -xc /dev/null > /dev/null 2>&1); then
	AC_MSG_RESULT(yes)
	AST_NO_STRICT_OVERFLOW=-fno-strict-overflow
else
	AC_MSG_RESULT(no)
	AST_NO_STRICT_OVERFLOW=
fi
AC_SUBST(AST_NO_STRICT_OVERFLOW)

AC_MSG_CHECKING(for -Wshadow)
if $(${CC} -Wshadow -S -o /dev/null -xc /dev/null > /dev/null 2>&1); then
	AC_MSG_RESULT(yes)
	AST_SHADOW_WARNINGS=-Wshadow
else
	AC_MSG_RESULT(no)
	AST_SHADOW_WARNINGS=
fi
AC_SUBST(AST_SHADOW_WARNINGS)

AC_MSG_CHECKING(for -march=native)
if $(${CC} -march=native -S -o /dev/null -xc /dev/null > /dev/null 2>&1); then
	AC_MSG_RESULT(yes)
	AST_MARCH_NATIVE="-march=native"
else
	AC_MSG_RESULT(no)