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dnl ** This is a configure script template for BIRD
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dnl ** Process it with autoconf to get ./configure
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dnl ** (c) 1999--2000 Martin Mares <mj@ucw.cz>
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AC_INIT
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AC_CONFIG_SRCDIR([conf/confbase.Y])
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AC_CONFIG_AUX_DIR(tools)
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AC_ARG_ENABLE(debug,	[  --enable-debug          enable internal debugging routines (default: disabled)],,enable_debug=no)
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AC_ARG_ENABLE(memcheck,	[  --enable-memcheck       check memory allocations when debugging (default: enabled)],,enable_memcheck=yes)
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AC_ARG_ENABLE(client,	[  --enable-client         enable building of BIRD client (default: enabled)],,enable_client=yes)
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AC_ARG_ENABLE(ipv6,	[  --enable-ipv6           enable building of IPv6 version (default: disabled)],,enable_ipv6=no)
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AC_ARG_ENABLE(pthreads,	[  --enable-pthreads       enable POSIX threads support (default: detect)],,enable_pthreads=try)
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AC_ARG_WITH(suffix,	[  --with-suffix=STRING    use specified suffix for BIRD files (default: 6 for IPv6 version)],[given_suffix="yes"])
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AC_ARG_WITH(sysconfig,	[  --with-sysconfig=FILE   use specified BIRD system configuration file])
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AC_ARG_WITH(protocols,	[  --with-protocols=LIST   include specified routing protocols (default: all)],,[with_protocols="all"])
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AC_ARG_WITH(sysinclude,	[  --with-sysinclude=PATH  search for system includes on specified place])
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AC_ARG_WITH(runtimedir,	[  --with-runtimedir=PATH  path for runtime files (default: $(localstatedir)/run)],[runtimedir="$with_runtimedir"],[runtimedir="\$(localstatedir)/run"])
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AC_ARG_WITH(iproutedir,	[  --with-iproutedir=PATH  path to iproute2 config files (default: /etc/iproute2)],[given_iproutedir="yes"])
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AC_ARG_VAR([FLEX], [location of the Flex program])
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AC_ARG_VAR([BISON], [location of the Bison program])
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AC_ARG_VAR([M4], [location of the M4 program])
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if test "$srcdir" = . ; then
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	# Building in current directory => create obj directory holding all objects
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	objdir=obj
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	mkdir -p obj
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	srcdir_rel=..
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	makefiles="Makefile:tools/Makefile-top.in obj/Makefile:tools/Makefile.in obj/Rules:tools/Rules.in"
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	exedir=..
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else
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	# Building in separate directory
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	objdir=.
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	srcdir_rel=$srcdir
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	makefiles="Makefile:tools/Makefile.in Rules:tools/Rules.in"
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	exedir=.
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fi
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case $srcdir_rel in
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	/*)	srcdir_rel_mf=$srcdir_rel ;;
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	*)	srcdir_rel_mf="\$(root-rel)$srcdir_rel" ;;
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esac
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AC_SUBST(objdir)
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AC_SUBST(exedir)
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AC_SUBST(srcdir_rel_mf)
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AC_SUBST(runtimedir)
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if test "$enable_ipv6" = yes ; then
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	ip=ipv6
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	SUFFIX=6
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	proto_radv=radv
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else
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	ip=ipv4
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	SUFFIX=""
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fi
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if test "$given_suffix" = yes ; then
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   	SUFFIX="$with_suffix"
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fi
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AC_SUBST(SUFFIX)
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if test "$enable_debug" = yes ; then
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	CONFIG_FILE="bird$SUFFIX.conf"
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	CONTROL_SOCKET="bird$SUFFIX.ctl"
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else
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	CONFIG_FILE="\$(sysconfdir)/bird$SUFFIX.conf"
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	CONTROL_SOCKET="$runtimedir/bird$SUFFIX.ctl"
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fi
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AC_SUBST(CONFIG_FILE)
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AC_SUBST(CONTROL_SOCKET)
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AC_SEARCH_LIBS(clock_gettime, [rt posix4], ,
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	AC_MSG_ERROR([[Function clock_gettime not available.]]))
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AC_CANONICAL_HOST
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# Store this value because ac_test_CFLAGS is overwritten by AC_PROG_CC
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if test "$ac_test_CFLAGS" != set ; then
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	bird_cflags_default=yes
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fi
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AC_PROG_CC
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if test -z "$GCC" ; then
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	AC_MSG_ERROR([This program requires the GNU C Compiler.])
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fi
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if test "$enable_pthreads" != no ; then
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	BIRD_CHECK_PTHREADS
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	if test "$bird_cv_lib_pthreads" = yes ; then
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		AC_DEFINE([USE_PTHREADS], [1], [Define to 1 if pthreads are enabled])
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		CFLAGS="$CFLAGS -pthread"
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		LDFLAGS="$LDFLAGS -pthread"
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		proto_bfd=bfd
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	elif test "$enable_pthreads" = yes ; then
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		AC_MSG_ERROR([POSIX threads not available.])
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	fi
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	if test "$enable_pthreads" = try ; then
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		enable_pthreads="$bird_cv_lib_pthreads"
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	fi
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fi
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if test "$bird_cflags_default" = yes ; then
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	BIRD_CHECK_GCC_OPTION(bird_cv_c_option_wno_pointer_sign, -Wno-pointer-sign, -Wall)
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	BIRD_CHECK_GCC_OPTION(bird_cv_c_option_wno_missing_init, -Wno-missing-field-initializers, -Wall -Wextra)
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	BIRD_CHECK_GCC_OPTION(bird_cv_c_option_fno_strict_aliasing, -fno-strict-aliasing)
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	BIRD_CHECK_GCC_OPTION(bird_cv_c_option_fno_strict_overflow, -fno-strict-overflow)
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	CFLAGS="$CFLAGS -Wall -Wextra -Wstrict-prototypes -Wno-parentheses"
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	BIRD_ADD_GCC_OPTION(bird_cv_c_option_wno_pointer_sign, -Wno-pointer-sign)
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	BIRD_ADD_GCC_OPTION(bird_cv_c_option_wno_missing_init, -Wno-missing-field-initializers)
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	BIRD_ADD_GCC_OPTION(bird_cv_c_option_fno_strict_aliasing, -fno-strict-aliasing)
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	BIRD_ADD_GCC_OPTION(bird_cv_c_option_fno_strict_overflow, -fno-strict-overflow)
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fi
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AC_MSG_CHECKING([CFLAGS])
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AC_MSG_RESULT($CFLAGS)
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AC_PROG_CPP
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AC_PROG_INSTALL
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AC_PROG_RANLIB
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AC_CHECK_PROG(FLEX, flex, flex)
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AC_CHECK_PROG(BISON, bison, bison)
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AC_CHECK_PROGS(M4, gm4 m4)
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test -z "$FLEX"	 && AC_MSG_ERROR([Flex is missing.])
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test -z "$BISON" && AC_MSG_ERROR([Bison is missing.])
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test -z "$M4"	 && AC_MSG_ERROR([M4 is missing.])
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BIRD_CHECK_PROG_FLAVOR_GNU([$M4], , [AC_MSG_ERROR([Provided M4 is not GNU M4.])])
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if test -n "$with_sysconfig" -a "$with_sysconfig" != no ; then
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	if test -f $with_sysconfig ; then
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		sysdesc=$with_sysconfig
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	else
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		sysdesc=$srcdir/sysdep/cf/$with_sysconfig
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		if ! test -f $sysdesc ; then
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			sysdesc=$sysdesc.h
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		fi
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	fi
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elif test -f sysconfig.h ; then
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	sysdesc=sysconfig
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else
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	case "$ip:$host_os" in
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		ipv6:linux*)	sysdesc=linux-v6
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				default_iproutedir="/etc/iproute2"
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				;;
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		ipv4:linux*)	sysdesc=linux
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				default_iproutedir="/etc/iproute2"
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				;;
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		ipv6:netbsd*)	sysdesc=bsd-v6
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				CPPFLAGS="$CPPFLAGS -I/usr/pkg/include"
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				LDFLAGS="$LDFLAGS -L/usr/pkg/lib -R/usr/pkg/lib"
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				;;
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		ipv4:netbsd*)	sysdesc=bsd
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				CPPFLAGS="$CPPFLAGS -I/usr/pkg/include"
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				LDFLAGS="$LDFLAGS -L/usr/pkg/lib -R/usr/pkg/lib"
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				;;
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		ipv6:freebsd*)	sysdesc=bsd-v6
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				;;
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		ipv4:freebsd*)	sysdesc=bsd
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				;;
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		ipv6:dragonfly*)	sysdesc=bsd-v6
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				;;
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		ipv4:dragonfly*)	sysdesc=bsd
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				;;
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		ipv6:kfreebsd*) sysdesc=bsd-v6
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				;;
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		ipv4:kfreebsd*) sysdesc=bsd
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				;;
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		ipv6:openbsd*)	sysdesc=bsd-v6
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				;;
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		ipv4:openbsd*)	sysdesc=bsd
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				;;
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		*)		AC_MSG_ERROR([Cannot determine correct system configuration. Please use --with-sysconfig to set it manually.])
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				;;
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		esac
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	sysdesc=$srcdir/sysdep/cf/$sysdesc.h
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fi
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AC_MSG_CHECKING([which OS configuration should we use])
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AC_MSG_RESULT($sysdesc)
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if ! test -f $sysdesc ; then
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	AC_MSG_ERROR([The system configuration file is missing.])
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fi
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sysname=`echo $sysdesc | sed 's/\.h$//'`
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AC_DEFINE_UNQUOTED([SYSCONF_INCLUDE], ["$sysdesc"], [Which sysdep header to include])
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AC_MSG_CHECKING([system-dependent directories])
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sysdep_dirs="`sed <$sysdesc '/^Link: /!d;s/^Link: \(.*\)$/\1/' | tr '\012' ' '` lib"
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AC_MSG_RESULT($sysdep_dirs)
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AC_SUBST(sysdep_dirs)
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if test "$with_iproutedir" = no ; then with_iproutedir= ; fi
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if test -n "$given_iproutedir"
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then iproutedir=$with_iproutedir
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else iproutedir=$default_iproutedir
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fi
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AC_SUBST(iproutedir)
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all_protocols="$proto_bfd bgp ospf pipe $proto_radv rip static"
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if test "$ip" = ipv6 ; then
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   all_protocols="$all_protocols babel"
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fi
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all_protocols=`echo $all_protocols | sed 's/ /,/g'`
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if test "$with_protocols" = all ; then
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	with_protocols="$all_protocols"
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fi
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AH_TEMPLATE([CONFIG_BABEL], 	[Babel protocol])
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AH_TEMPLATE([CONFIG_BFD],	[BFD protocol])
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AH_TEMPLATE([CONFIG_BGP],	[BGP protocol])
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AH_TEMPLATE([CONFIG_OSPF],	[OSPF protocol])
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AH_TEMPLATE([CONFIG_PIPE],	[Pipe protocol])
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AH_TEMPLATE([CONFIG_RADV],	[RAdv protocol])
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AH_TEMPLATE([CONFIG_RIP],	[RIP protocol])
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AH_TEMPLATE([CONFIG_STATIC],	[Static protocol])
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AC_MSG_CHECKING([protocols])
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protocols=`echo "$with_protocols" | sed 's/,/ /g'`
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if test "$protocols" = no ; then protocols= ; fi
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for a in $protocols ; do
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	if ! test -f $srcdir/proto/$a/Makefile ; then
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		AC_MSG_RESULT(failed)
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		AC_MSG_ERROR([Requested protocol $a not found.])
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		fi
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	AC_DEFINE_UNQUOTED(CONFIG_`echo $a | tr 'a-z' 'A-Z'`)
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	done
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AC_MSG_RESULT(ok)
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AC_SUBST(protocols)
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case $sysdesc in
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	*/linux*|*/linux-v6*)
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		AC_CHECK_HEADER(linux/rtnetlink.h,,[AC_MSG_ERROR([Appropriate version of Linux kernel headers not found.])],[
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#include <asm/types.h>
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#include <sys/socket.h>
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])
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		;;
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esac
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AC_CHECK_HEADERS_ONCE([alloca.h syslog.h])
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AC_MSG_CHECKING(whether 'struct sockaddr' has sa_len)
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AC_COMPILE_IFELSE([
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  AC_LANG_PROGRAM(
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    [[
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      #include <sys/types.h>
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      #include <sys/socket.h>
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    ]],
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    [[
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      static struct sockaddr sa;
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      int i = sizeof(sa.sa_len);
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    ]]
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  )],
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  [
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    AC_MSG_RESULT(yes)
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    AC_DEFINE(HAVE_SIN_LEN,,sin_len)
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  ],
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  [AC_MSG_RESULT(no)]
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)
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AC_C_BIGENDIAN(
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  [AC_DEFINE([CPU_BIG_ENDIAN], [1], [Define to 1 if cpu is big endian])],
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  [AC_DEFINE([CPU_LITTLE_ENDIAN], [1], [Define to 1 if cpu is little endian])],
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  [AC_MSG_ERROR([Cannot determine CPU endianity.])]
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)
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BIRD_CHECK_STRUCT_ALIGN
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BIRD_CHECK_TIME_T
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if test "$enable_debug" = yes ; then
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	AC_DEFINE([DEBUGGING], [1], [Define to 1 if debugging is enabled])
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	if test "$enable_memcheck" = yes ; then
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		AC_CHECK_LIB(dmalloc, dmalloc_debug)
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		if test $ac_cv_lib_dmalloc_dmalloc_debug != yes ; then
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			AC_CHECK_LIB(efence, malloc)
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		fi
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	fi
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fi
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CLIENT=
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CLIENT_LIBS=
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if test "$enable_client" = yes ; then
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	CLIENT=birdc
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	AC_CHECK_LIB(history, add_history, CLIENT_LIBS="-lhistory")
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	AC_CHECK_LIB(ncurses, tgetent, USE_TERMCAP_LIB=-lncurses,
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		AC_CHECK_LIB(curses, tgetent, USE_TERMCAP_LIB=-lcurses,
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			AC_CHECK_LIB(tinfow, tgetent, USE_TERMCAP_LIB=-ltinfow,
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				AC_CHECK_LIB(tinfo, tgetent, USE_TERMCAP_LIB=-ltinfo,
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					AC_CHECK_LIB(termcap, tgetent, USE_TERMCAP_LIB=-ltermcap,
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						AC_MSG_ERROR([[The client requires ncurses library. Either install the library or use --disable-client to compile without the client.]]))))))
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	AC_CHECK_LIB(readline, rl_callback_read_char, CLIENT_LIBS="-lreadline $CLIENT_LIBS $USE_TERMCAP_LIB",
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		AC_MSG_ERROR([[The client requires GNU readline library 2.1 or newer. Either install the library or use --disable-client to compile without the client.]]), $USE_TERMCAP_LIB)
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	AC_CHECK_LIB(readline, rl_crlf, AC_DEFINE([HAVE_RL_CRLF], [1], [Define to 1 if you have rl_crlf()]),,$USE_TERMCAP_LIB)
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	AC_CHECK_LIB(readline, rl_ding, AC_DEFINE([HAVE_RL_DING], [1], [Define to 1 if you have rl_ding()]),,$USE_TERMCAP_LIB)
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fi
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AC_SUBST(CLIENT)
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AC_SUBST(CLIENT_LIBS)
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mkdir -p $objdir/sysdep
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AC_CONFIG_HEADERS([$objdir/sysdep/autoconf.h:sysdep/autoconf.h.in])
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AC_CONFIG_COMMANDS([merge],[[export CPP="$CPP"
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$srcdir/tools/mergedirs $srcdir $srcdir_rel $objdir $sysdep_dirs]],
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	[[srcdir=$srcdir]
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	[srcdir_rel=$srcdir_rel]
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	[objdir=$objdir]
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	[sysdep_dirs="$sysdep_dirs"]])
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AC_CONFIG_FILES($makefiles)
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AC_OUTPUT
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rm -f $objdir/sysdep/paths.h
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AC_MSG_RESULT()
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AC_MSG_RESULT([BIRD was configured with the following options:])
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AC_MSG_RESULT([        Source directory:	$srcdir])
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AC_MSG_RESULT([        Object directory:	$objdir])
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AC_MSG_RESULT([        Iproute2 directory:	$iproutedir])
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AC_MSG_RESULT([        System configuration:	$sysdesc])
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AC_MSG_RESULT([        Debugging:		$enable_debug])
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AC_MSG_RESULT([        POSIX threads:		$enable_pthreads])
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AC_MSG_RESULT([        Routing protocols:	$protocols])
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AC_MSG_RESULT([        Client:			$enable_client])
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rm -f $objdir/.*-stamp