AC_DEFUN([TUXBOX_APPS],[
AM_CONFIG_HEADER(config.h)
AM_MAINTAINER_MODE

AC_SYS_LARGEFILE

AC_ARG_WITH(target,
	[  --with-target=TARGET    target for compilation [[native,cdk]]],
	[TARGET="$withval"],[TARGET="native"])

AC_ARG_WITH(targetprefix,
	[  --with-targetprefix=PATH  prefix relative to target root (only applicable in cdk mode)],
	[targetprefix="$withval"],[targetprefix="NONE"])

AC_ARG_WITH(debug,
	[  --without-debug         disable debugging code],
	[DEBUG="$withval"],[DEBUG="yes"])

if test "$DEBUG" = "yes"; then
	DEBUG_CFLAGS="-g3 -ggdb"
	AC_DEFINE(DEBUG,1,[Enable debug messages])
fi

AC_MSG_CHECKING(target)

if test "$TARGET" = "native"; then
	AC_MSG_RESULT(native)

	if test "$CFLAGS" = "" -a "$CXXFLAGS" = ""; then
		CFLAGS="-Wall -O2 -pipe $DEBUG_CFLAGS"
		CXXFLAGS="-Wall -O2 -pipe $DEBUG_CFLAGS"
	fi
	if test "$prefix" = "NONE"; then
		prefix=/usr/local
	fi
	targetprefix=$prefix
elif test "$TARGET" = "cdk"; then
	AC_MSG_RESULT(cdk)

	if test "$prefix" = "NONE"; then
		AC_MSG_ERROR(invalid prefix, you need to specify one in cdk mode)
	fi
	if test "$targetprefix" = "NONE"; then
		targetprefix=""
	fi
else
	AC_MSG_RESULT(none)
	AC_MSG_ERROR([invalid target $TARGET, choose on from native,cdk]);
fi

AC_CANONICAL_BUILD
AC_CANONICAL_HOST

check_path () {
	return $(perl -e "if(\"$1\"=~m#^/usr/(local/)?bin#){print \"0\"}else{print \"1\";}")
}

])

dnl expand nested ${foo}/bar
AC_DEFUN([TUXBOX_EXPAND_VARIABLE],[__$1="$2"
	for __CNT in false false false false true; do dnl max 5 levels of indirection

		$1=`eval echo "$__$1"`
		echo ${$1} | grep -q '\$' || break # 'grep -q' is POSIX, exit if no $ in variable
		__$1="${$1}"
	done
	$__CNT && AC_MSG_ERROR([can't expand variable $1=$2]) dnl bail out if we did not expand
])

AC_DEFUN([TUXBOX_APPS_DIRECTORY_ONE],[
AC_ARG_WITH($1,[  $6$7 [[PREFIX$4$5]]],[
	_$2=$withval
	if test "$TARGET" = "cdk"; then
		$2=`eval echo "${targetprefix}$withval"` # no indirection possible IMNSHO
	else
		$2=$withval
	fi
	TARGET_$2=${$2}
],[
	# RFC 1925: "you can always add another level of indirection..."
	TUXBOX_EXPAND_VARIABLE($2,"${$3}$5")
	if test "$TARGET" = "cdk"; then
		TUXBOX_EXPAND_VARIABLE(_$2,"${target$3}$5")
	else
		_$2=${$2}
	fi
	TARGET_$2=$_$2
])

dnl automake <= 1.6 don't support this
dnl AC_SUBST($2)
AC_DEFINE_UNQUOTED($2,"$_$2",$7)
AC_SUBST(TARGET_$2)
])

AC_DEFUN([TUXBOX_APPS_DIRECTORY],[
AC_REQUIRE([TUXBOX_APPS])

if test "$TARGET" = "cdk"; then
	datadir="\${prefix}/share"
	sysconfdir="\${prefix}/etc"
	localstatedir="\${prefix}/var"
	libdir="\${prefix}/lib"
	targetdatadir="\${targetprefix}/share"
	targetsysconfdir="\${targetprefix}/etc"
	targetlocalstatedir="\${targetprefix}/var"
	targetlibdir="\${targetprefix}/lib"
fi

TUXBOX_APPS_DIRECTORY_ONE(configdir,CONFIGDIR,localstatedir,/var,/tuxbox/config,
	[--with-configdir=PATH   ],[where to find the config files])

TUXBOX_APPS_DIRECTORY_ONE(datadir,DATADIR,datadir,/share,/tuxbox,
	[--with-datadir=PATH     ],[where to find data])

TUXBOX_APPS_DIRECTORY_ONE(fontdir,FONTDIR,datadir,/share,/fonts,
	[--with-fontdir=PATH     ],[where to find the fonts])

TUXBOX_APPS_DIRECTORY_ONE(gamesdir,GAMESDIR,localstatedir,/var,/tuxbox/games,
	[--with-gamesdir=PATH    ],[where games data is stored])

TUXBOX_APPS_DIRECTORY_ONE(libdir,LIBDIR,libdir,/lib,/tuxbox,
	[--with-libdir=PATH      ],[where to find the internal libs])

TUXBOX_APPS_DIRECTORY_ONE(plugindir,PLUGINDIR,libdir,/lib,/tuxbox/plugins,
	[--with-plugindir=PATH   ],[where to find the plugins])

TUXBOX_APPS_DIRECTORY_ONE(ucodedir,UCODEDIR,localstatedir,/var,/tuxbox/ucodes,
	[--with-ucodedir=PATH    ],[where to find the ucodes])

TUXBOX_APPS_DIRECTORY_ONE(themesdir,THEMESDIR,datadir,/share,/tuxbox/neutrino/themes,
	[--with-themesdir=PATH     ],[where to find the themes (don't change)])
])

dnl automake <= 1.6 needs this specifications
AC_SUBST(CONFIGDIR)
AC_SUBST(DATADIR)
AC_SUBST(FONTDIR)
AC_SUBST(GAMESDIR)
AC_SUBST(LIBDIR)
AC_SUBST(PLUGINDIR)
AC_SUBST(UCODEDIR)
AC_SUBST(THEMESDIR)
dnl end workaround

AC_DEFUN([TUXBOX_APPS_ENDIAN],[
AC_CHECK_HEADERS(endian.h)
AC_C_BIGENDIAN
])

AC_DEFUN([TUXBOX_APPS_DVB],[
AC_ARG_WITH(dvbincludes,
	[  --with-dvbincludes=PATH  path for dvb includes [[NONE]]],
	[DVBINCLUDES="$withval"],[DVBINCLUDES=""])

if test "$DVBINCLUDES"; then
	CPPFLAGS="$CPPFLAGS -I$DVBINCLUDES"
fi

if test -z "$DVB_API_VERSION"; then
AC_CHECK_HEADERS(linux/dvb/version.h,[
	AC_LANG_PREPROC_REQUIRE()
	AC_REQUIRE([AC_PROG_EGREP])
	AC_LANG_CONFTEST([AC_LANG_SOURCE([[
#include <linux/dvb/version.h>
version DVB_API_VERSION
	]])])
	DVB_API_VERSION=`(eval "$ac_cpp conftest.$ac_ext") 2>&AS_MESSAGE_LOG_FD | $EGREP "^version" | sed "s,version\ ,,"`
	rm -f conftest*

	AC_MSG_NOTICE([found dvb version $DVB_API_VERSION])
])
fi

if test "$DVB_API_VERSION"; then
	AC_DEFINE(HAVE_DVB,1,[Define to 1 if you have the dvb includes])
	AC_DEFINE_UNQUOTED(HAVE_DVB_API_VERSION,$DVB_API_VERSION,[Define to the version of the dvb api])
else
	AC_MSG_ERROR([can't find dvb headers])
fi
])

AC_DEFUN([_TUXBOX_APPS_LIB_CONFIG],[
AC_PATH_PROG($1_CONFIG,$2,no)
if test "$$1_CONFIG" != "no"; then
	if test "$TARGET" = "cdk" && check_path "$$1_CONFIG"; then
		AC_MSG_$3([could not find a suitable version of $2]);
	else
                if test "$1" = "CURL"; then
                	$1_CFLAGS=$($$1_CONFIG --cflags)
			$1_LIBS=$($$1_CONFIG --libs)
		else
	    		if test "$1" = "FREETYPE"; then
	            		$1_CFLAGS=$($$1_CONFIG --cflags)
	            		$1_LIBS=$($$1_CONFIG --libs)
	    		else
	            		$1_CFLAGS=$($$1_CONFIG --prefix=$targetprefix --cflags)
	            		$1_LIBS=$($$1_CONFIG --prefix=$targetprefix --libs)
			fi
	        fi
	fi
fi

AC_SUBST($1_CFLAGS)
AC_SUBST($1_LIBS)
])

AC_DEFUN([TUXBOX_APPS_LIB_CONFIG],[
_TUXBOX_APPS_LIB_CONFIG($1,$2,ERROR)
if test "$$1_CONFIG" = "no"; then
	AC_MSG_ERROR([could not find $2]);
fi
])

AC_DEFUN([TUXBOX_APPS_LIB_CONFIG_CHECK],[
_TUXBOX_APPS_LIB_CONFIG($1,$2,WARN)
])

AC_DEFUN([TUXBOX_APPS_PKGCONFIG],[
m4_pattern_forbid([^_?PKG_[A-Z_]+$])
m4_pattern_allow([^PKG_CONFIG(_PATH)?$])
AC_ARG_VAR([PKG_CONFIG], [path to pkg-config utility])dnl
if test "x$ac_cv_env_PKG_CONFIG_set" != "xset"; then
	AC_PATH_TOOL([PKG_CONFIG], [pkg-config])
fi
if test x"$PKG_CONFIG" = x"" ; then
	AC_MSG_ERROR([could not find pkg-config]);
fi
])

AC_DEFUN([_TUXBOX_APPS_LIB_PKGCONFIG],[
AC_REQUIRE([TUXBOX_APPS_PKGCONFIG])
AC_MSG_CHECKING(for package $2)
if $PKG_CONFIG --exists "$2" ; then
	AC_MSG_RESULT(yes)
	$1_CFLAGS=$($PKG_CONFIG --cflags "$2")
	$1_LIBS=$($PKG_CONFIG --libs "$2")
	$1_EXISTS=yes
else
	AC_MSG_RESULT(no)
fi

AC_SUBST($1_CFLAGS)
AC_SUBST($1_LIBS)
])

AC_DEFUN([TUXBOX_APPS_LIB_PKGCONFIG],[
_TUXBOX_APPS_LIB_PKGCONFIG($1,$2)
if test x"$$1_EXISTS" != xyes; then
	AC_MSG_ERROR([could not find package $2]);
fi
])

AC_DEFUN([TUXBOX_APPS_LIB_PKGCONFIG_CHECK],[
_TUXBOX_APPS_LIB_PKGCONFIG($1,$2)
])

AC_DEFUN([_TUXBOX_APPS_LIB_SYMBOL],[
AC_CHECK_LIB($2,$3,HAVE_$1="yes",HAVE_$1="no")
if test "$HAVE_$1" = "yes"; then
	$1_LIBS=-l$2
fi

AC_SUBST($1_LIBS)
])

AC_DEFUN([TUXBOX_APPS_LIB_SYMBOL],[
_TUXBOX_APPS_LIB_SYMBOL($1,$2,$3,ERROR)
if test "$HAVE_$1" = "no"; then
	AC_MSG_ERROR([could not find $2]);
fi
])

AC_DEFUN([TUXBOX_APPS_LIB_CONFIG_SYMBOL],[
_TUXBOX_APPS_LIB_SYMBOL($1,$2,$3,WARN)
])

AC_DEFUN([TUXBOX_BOXTYPE],[
AC_ARG_WITH(boxtype,
	[  --with-boxtype          valid values: dbox2,tripledragon,dreambox,ipbox,coolstream,spark,azbox,generic,duckbox,spark7162],
	[case "${withval}" in
		dbox2|dreambox|ipbox|tripledragon|coolstream|spark|azbox|generic)
			BOXTYPE="$withval"
			;;
		spark7162)
			BOXTYPE="spark"
			BOXMODEL="$withval"
			;;
		dm*)
			BOXTYPE="dreambox"
			BOXMODEL="$withval"
			;;
		ufs*)
			BOXTYPE="duckbox"
			BOXMODEL="$withval"
			;;
		atevio*)
			BOXTYPE="duckbox"
			BOXMODEL="$withval"
			;;
		fortis*)
			BOXTYPE="duckbox"
			BOXMODEL="$withval"
			;;
		octagon*)
			BOXTYPE="duckbox"
			BOXMODEL="$withval"
			;;
		hs7*)
			BOXTYPE="duckbox"
			BOXMODEL="$withval"
			;;
		dp*)
			BOXTYPE="duckbox"
			BOXMODEL="$withval"
			;;
		cuberevo*)
			BOXTYPE="duckbox"
			BOXMODEL="$withval"
			;;
		tf*)
			BOXTYPE="duckbox"
			BOXMODEL="$withval"
			;;
		*)
			AC_MSG_ERROR([bad value $withval for --with-boxtype]) ;;
	esac], [BOXTYPE="generic"])

AC_ARG_WITH(boxmodel,
	[  --with-boxmodel         valid for dreambox: dm500, dm500plus, dm600pvr, dm56x0, dm7000, dm7020, dm7025
                          valid for ipbox: ip200, ip250, ip350, ip400
                          valid for duckbox: ufs910, ufs912, ufs913, ufs922, atevio7500, fortis_hdbox, octagon1008, hs7110, hs7810a, hs7119, hs7819, dp7000, cuberevo, cuberevo_mini, cuberevo_mini2, cuberevo_250hd, cuberevo_2000hd, tf7700],
	[case "${withval}" in
		dm500|dm500plus|dm600pvr|dm56x0|dm7000|dm7020|dm7025)
			if test "$BOXTYPE" = "dreambox"; then
				BOXMODEL="$withval"
			else
				AC_MSG_ERROR([unknown model $withval for boxtype $BOXTYPE])
			fi
			;;
		ip200|ip250|ip350|ip400)
			if test "$BOXTYPE" = "ipbox"; then
				BOXMODEL="$withval"
			else
				AC_MSG_ERROR([unknown model $withval for boxtype $BOXTYPE])
			fi
			;;
		ufs910|ufs912|ufs913|ufs922|atevio7500|fortis_hdbox|octagon1008|hs7110|hs7810a|hs7119|hs7819|dp7000|cuberevo|cuberevo_mini|cuberevo_mini2|cuberevo_250hd|cuberevo_2000hd|tf7700)
			if test "$BOXTYPE" = "duckbox"; then
				BOXMODEL="$withval"
			else
				AC_MSG_ERROR([unknown model $withval for boxtype $BOXTYPE])
			fi
			;;
		raspi)
			if test "$BOXTYPE" = "generic"; then
				BOXMODEL="$withval"
			else
				AC_MSG_ERROR([unknown model $withval for boxtype $BOXTYPE])
			fi
			;;
		*)
			AC_MSG_ERROR([unsupported value $withval for --with-boxmodel])
			;;
	esac],
	[if test "$BOXTYPE" = "dreambox" -o "$BOXTYPE" = "ipbox" && test -z "$BOXMODEL"; then
		AC_MSG_ERROR([Dreambox/IPBox needs --with-boxmodel])
	fi])

AC_SUBST(BOXTYPE)
AC_SUBST(BOXMODEL)

AM_CONDITIONAL(BOXTYPE_AZBOX, test "$BOXTYPE" = "azbox")
AM_CONDITIONAL(BOXTYPE_DBOX2, test "$BOXTYPE" = "dbox2")
AM_CONDITIONAL(BOXTYPE_TRIPLE, test "$BOXTYPE" = "tripledragon")
AM_CONDITIONAL(BOXTYPE_SPARK, test "$BOXTYPE" = "spark")
AM_CONDITIONAL(BOXTYPE_DREAMBOX, test "$BOXTYPE" = "dreambox")
AM_CONDITIONAL(BOXTYPE_IPBOX, test "$BOXTYPE" = "ipbox")
AM_CONDITIONAL(BOXTYPE_COOL, test "$BOXTYPE" = "coolstream")
AM_CONDITIONAL(BOXTYPE_GENERIC, test "$BOXTYPE" = "generic")
AM_CONDITIONAL(BOXTYPE_DUCKBOX, test "$BOXTYPE" = "duckbox")

AM_CONDITIONAL(BOXMODEL_DM500,test "$BOXMODEL" = "dm500")
AM_CONDITIONAL(BOXMODEL_DM500PLUS,test "$BOXMODEL" = "dm500plus")
AM_CONDITIONAL(BOXMODEL_DM600PVR,test "$BOXMODEL" = "dm600pvr")
AM_CONDITIONAL(BOXMODEL_DM56x0,test "$BOXMODEL" = "dm56x0")
AM_CONDITIONAL(BOXMODEL_DM7000,test "$BOXMODEL" = "dm7000" -o "$BOXMODEL" = "dm7020" -o "$BOXMODEL" = "dm7025")

AM_CONDITIONAL(BOXMODEL_IP200,test "$BOXMODEL" = "ip200")
AM_CONDITIONAL(BOXMODEL_IP250,test "$BOXMODEL" = "ip250")
AM_CONDITIONAL(BOXMODEL_IP350,test "$BOXMODEL" = "ip350")
AM_CONDITIONAL(BOXMODEL_IP400,test "$BOXMODEL" = "ip400")

AM_CONDITIONAL(BOXMODEL_UFS910, test "$BOXMODEL" = "ufs910")
AM_CONDITIONAL(BOXMODEL_UFS912,test "$BOXMODEL" = "ufs912")
AM_CONDITIONAL(BOXMODEL_UFS913,test "$BOXMODEL" = "ufs913")
AM_CONDITIONAL(BOXMODEL_UFS922,test "$BOXMODEL" = "ufs922")

AM_CONDITIONAL(BOXMODEL_SPARK7162,test "$BOXMODEL" = "spark7162")

AM_CONDITIONAL(BOXMODEL_ATEVIO7500, test "$BOXMODEL" = "atevio7500")
AM_CONDITIONAL(BOXMODEL_FORTIS_HDBOX,test "$BOXMODEL" = "fortis_hdbox")
AM_CONDITIONAL(BOXMODEL_OCTAGON1008,test "$BOXMODEL" = "octagon1008")
AM_CONDITIONAL(BOXMODEL_HS7110,test "$BOXMODEL" = "hs7110")
AM_CONDITIONAL(BOXMODEL_HS7810A,test "$BOXMODEL" = "hs7810a")
AM_CONDITIONAL(BOXMODEL_HS7119,test "$BOXMODEL" = "hs7119")
AM_CONDITIONAL(BOXMODEL_HS7819,test "$BOXMODEL" = "hs7819")
AM_CONDITIONAL(BOXMODEL_DP7000,test "$BOXMODEL" = "dp7000")

AM_CONDITIONAL(BOXMODEL_CUBEREVO,test "$BOXMODEL" = "cuberevo")
AM_CONDITIONAL(BOXMODEL_CUBEREVO_MINI,test "$BOXMODEL" = "cuberevo_mini")
AM_CONDITIONAL(BOXMODEL_CUBEREVO_MINI2,test "$BOXMODEL" = "cuberevo_mini2")
AM_CONDITIONAL(BOXMODEL_CUBEREVO_250HD,test "$BOXMODEL" = "cuberevo_250hd")
AM_CONDITIONAL(BOXMODEL_CUBEREVO_2000HD,test "$BOXMODEL" = "cuberevo_2000hd")
AM_CONDITIONAL(BOXMODEL_TF7700,test "$BOXMODEL" = "tf7700")


AM_CONDITIONAL(BOXMODEL_RASPI,test "$BOXMODEL" = "raspi")

if test "$BOXTYPE" = "dbox2"; then
	AC_DEFINE(HAVE_DBOX_HARDWARE, 1, [building for a dbox2])
elif test "$BOXTYPE" = "azbox"; then
	AC_DEFINE(HAVE_AZBOX_HARDWARE, 1, [building for an azbox])
elif test "$BOXTYPE" = "tripledragon"; then
	AC_DEFINE(HAVE_TRIPLEDRAGON, 1, [building for a tripledragon])
elif test "$BOXTYPE" = "spark"; then
	AC_DEFINE(HAVE_SPARK_HARDWARE, 1, [building for a spark st7111 box])
elif test "$BOXTYPE" = "dreambox"; then
	AC_DEFINE(HAVE_DREAMBOX_HARDWARE, 1, [building for a dreambox])
elif test "$BOXTYPE" = "ipbox"; then
	AC_DEFINE(HAVE_IPBOX_HARDWARE, 1, [building for an ipbox])
elif test "$BOXTYPE" = "coolstream"; then
	AC_DEFINE(HAVE_COOL_HARDWARE, 1, [building for a coolstream])
elif test "$BOXTYPE" = "generic"; then
	AC_DEFINE(HAVE_GENERIC_HARDWARE, 1, [building for a generic device like a standard PC])
elif test "$BOXTYPE" = "duckbox"; then
	AC_DEFINE(HAVE_DUCKBOX_HARDWARE, 1, [building for a duckbox])
fi

# TODO: do we need more defines?
if test "$BOXMODEL" = "dm500"; then
	AC_DEFINE(BOXMODEL_DM500, 1, [dreambox 500])
elif test "$BOXMODEL" = "ip200"; then
	AC_DEFINE(BOXMODEL_IP200, 1, [ipbox 200])
elif test "$BOXMODEL" = "ip250"; then
	AC_DEFINE(BOXMODEL_IP250, 1, [ipbox 250])
elif test "$BOXMODEL" = "ip350"; then
	AC_DEFINE(BOXMODEL_IP350, 1, [ipbox 350])
elif test "$BOXMODEL" = "ip400"; then
	AC_DEFINE(BOXMODEL_IP400, 1, [ipbox 400])
elif test "$BOXMODEL" = "ufs910"; then
	AC_DEFINE(BOXMODEL_UFS910, 1, [ufs910])
elif test "$BOXMODEL" = "ufs912"; then
	AC_DEFINE(BOXMODEL_UFS912, 1, [ufs912])
elif test "$BOXMODEL" = "ufs913"; then
	AC_DEFINE(BOXMODEL_UFS913, 1, [ufs913])
elif test "$BOXMODEL" = "ufs922"; then
	AC_DEFINE(BOXMODEL_UFS922, 1, [ufs922])
elif test "$BOXMODEL" = "spark7162"; then
	AC_DEFINE(BOXMODEL_SPARK7162, 1, [spark7162])
elif test "$BOXMODEL" = "atevio7500"; then
	AC_DEFINE(BOXMODEL_ATEVIO7500, 1, [atevio7500])
elif test "$BOXMODEL" = "fortis_hdbox"; then
	AC_DEFINE(BOXMODEL_FORTIS_HDBOX, 1, [fortis_hdbox])
elif test "$BOXMODEL" = "octagon1008"; then
	AC_DEFINE(BOXMODEL_OCTAGON1008, 1, [octagon1008])
elif test "$BOXMODEL" = "hs7110"; then
	AC_DEFINE(BOXMODEL_HS7110, 1, [hs7110])
elif test "$BOXMODEL" = "hs7810a"; then
	AC_DEFINE(BOXMODEL_HS7810A, 1, [hs7810a])
elif test "$BOXMODEL" = "hs7119"; then
	AC_DEFINE(BOXMODEL_HS7119, 1, [hs7119])
elif test "$BOXMODEL" = "hs7819"; then
	AC_DEFINE(BOXMODEL_HS7819, 1, [hs7819])
elif test "$BOXMODEL" = "dp7000"; then
	AC_DEFINE(BOXMODEL_DP7000, 1, [dp7000])
elif test "$BOXMODEL" = "cuberevo"; then
	AC_DEFINE(BOXMODEL_CUBEREVO, 1, [cuberevo])
elif test "$BOXMODEL" = "cuberevo_mini"; then
	AC_DEFINE(BOXMODEL_CUBEREVO_MINI, 1, [cuberevo_mini])
elif test "$BOXMODEL" = "cuberevo_mini2"; then
	AC_DEFINE(BOXMODEL_CUBEREVO_MINI2, 1, [cuberevo_mini2])
elif test "$BOXMODEL" = "cuberevo_250hd"; then
	AC_DEFINE(BOXMODEL_CUBEREVO_250HD, 1, [cuberevo_250hd])
elif test "$BOXMODEL" = "cuberevo_2000hd"; then
	AC_DEFINE(BOXMODEL_CUBEREVO_2000HD, 1, [cuberevo_2000hd])
elif test "$BOXMODEL" = "tf7700"; then
	AC_DEFINE(BOXMODEL_TF7700, 1, [tf7700])
elif test "$BOXMODEL" = "raspi"; then
	AC_DEFINE(BOXMODEL_RASPI, 1, [Raspberry pi])
fi
])

dnl backward compatiblity
AC_DEFUN([AC_GNU_SOURCE],
[AH_VERBATIM([_GNU_SOURCE],
[/* Enable GNU extensions on systems that have them.  */
#ifndef _GNU_SOURCE
# undef _GNU_SOURCE
#endif])dnl
AC_BEFORE([$0], [AC_COMPILE_IFELSE])dnl
AC_BEFORE([$0], [AC_RUN_IFELSE])dnl
AC_DEFINE([_GNU_SOURCE])
])

AC_DEFUN([AC_PROG_EGREP],
[AC_CACHE_CHECK([for egrep], [ac_cv_prog_egrep],
   [if echo a | (grep -E '(a|b)') >/dev/null 2>&1
    then ac_cv_prog_egrep='grep -E'
    else ac_cv_prog_egrep='egrep'
    fi])
 EGREP=$ac_cv_prog_egrep
 AC_SUBST([EGREP])
])