configure.in 130 KB
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# Copyright (C) 2004-2015  Internet Systems Consortium, Inc. ("ISC")
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# Copyright (C) 1998-2003  Internet Software Consortium.
#
# Permission to use, copy, modify, and/or distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
# REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
# AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
# INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
# LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
# OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
# PERFORMANCE OF THIS SOFTWARE.
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# Copyright (C) 1998-2003  Internet Software Consortium.
#
# Permission to use, copy, modify, and/or distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
# REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
# AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
# INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
# LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
# OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
# PERFORMANCE OF THIS SOFTWARE.
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dnl
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AC_DIVERT_PUSH(1)dnl
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esyscmd([sed -e 's/^/# /' -e '/Portions of this code/,$d' COPYRIGHT])dnl
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AC_DIVERT_POP()dnl
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AC_INIT(BIND, [9.11], [bind9-bugs@isc.org], [], [https://www.isc.org/downloads/BIND/])
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AC_PREREQ(2.59)
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AC_CONFIG_HEADER(config.h)
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AC_CONFIG_MACRO_DIR([libtool.m4])
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AC_CANONICAL_HOST

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AC_PROG_MAKE_SET
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#
# GNU libtool support
#
case $build_os in
sunos*)
    # Just set the maximum command line length for sunos as it otherwise
    # takes a exceptionally long time to work it out. Required for libtool.
     
    lt_cv_sys_max_cmd_len=4096;
    ;;
esac

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AC_PROG_LIBTOOL
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AC_PROG_INSTALL
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AC_PROG_LN_S
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AC_SUBST(STD_CINCLUDES)
AC_SUBST(STD_CDEFINES)
AC_SUBST(STD_CWARNINGS)
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AC_SUBST(CCOPT)
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AC_SUBST(CCNOOPT)
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AC_SUBST(BACKTRACECFLAGS)
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# Warn if the user specified libbind, which is now deprecated
AC_ARG_ENABLE(libbind, [  --enable-libbind	  deprecated])

case "$enable_libbind" in
	yes)
		AC_MSG_ERROR(['libbind' is no longer part of the BIND 9 distribution.
It is available from http://www.isc.org as a separate download.])
		;;
	no|'')
		;;
esac

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AC_ARG_ENABLE(warn_shadow, [  --enable-warn-shadow	  turn on -Wshadow when compiling])

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AC_ARG_ENABLE(warn_error, [  --enable-warn-error	  turn on -Werror when compiling])

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AC_ARG_ENABLE(developer, [  --enable-developer      enable developer build settings])
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case "$enable_developer" in
yes)
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	STD_CDEFINES="$STD_CDEFINES -DISC_LIST_CHECKINIT=1"
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	test "${enable_fixed_rrset+set}" = set || enable_fixed_rrset=yes
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	test "${enable_querytrace+set}" = set || enable_querytrace=yes
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	test "${with_atf+set}" = set || with_atf=yes
	test "${enable_filter_aaaa+set}" = set || enable_filter_aaaa=yes
	test "${with_dlz_filesystem+set}" = set || with_dlz_filesystem=yes
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	test "${enable_symtable+set}" = set || enable_symtable=all
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	test "${enable_warn_error+set}" = set || enable_warn_error=yes
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	test "${enable_warn_shadow+set}" = set || enable_warn_shadow=yes
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	;;
esac
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#libseccomp sandboxing
AC_ARG_ENABLE(seccomp,
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	AS_HELP_STRING([--enable-seccomp],[enable support for libseccomp system call filtering [default=no]]))
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case "$enable_seccomp" in
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	yes)
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	case $host_os in
	linux*)
		;;
	*)
		AC_MSG_WARN([seccomp is not supported on non-linux platforms; disabling it])
		enable_seccomp=no
		;;
	esac
	AC_SEARCH_LIBS(seccomp_init, [seccomp])
	if test "$ac_cv_search_seccomp_init" = "-lseccomp" ; then
		AC_TRY_RUN([
		#include <stdio.h>
		#include <stdlib.h>
		#include <errno.h>
		#include <sys/prctl.h>
		#include <linux/seccomp.h>

		int main(void)
		{
			int ret;

			ret = prctl(PR_GET_SECCOMP, 0, 0, 0, 0);
			if (ret < 0) {
				switch (errno) {
				case ENOSYS:
					return 1;
				case EINVAL:
					return 1;
				default:
					return 1;
				}
			}
			ret = 
			prctl(PR_SET_SECCOMP, SECCOMP_MODE_FILTER, NULL, 0, 0);
			if (ret < 0) {
				switch (errno) {
				case EINVAL:
					return 1;
				case EFAULT:
					return 0;
				default:
					return 1;
			}
		}
	return 1;
	}
	]
	, AC_DEFINE([HAVE_LIBSECCOMP], 1, 
	[Define to use libseccomp system call filtering.])   
	, []
	)
	fi
		;;
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	*)
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		;;
esac

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#
# Make very sure that these are the first files processed by
# config.status, since we use the processed output as the input for
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# AC_SUBST_FILE() substitutions in other files.
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#
AC_CONFIG_FILES([make/rules make/includes])

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AC_PATH_PROG(AR, ar)
ARFLAGS="cruv"
AC_SUBST(AR)
AC_SUBST(ARFLAGS)

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# The POSIX ln(1) program.  Non-POSIX systems may substitute
# "copy" or something.
LN=ln
AC_SUBST(LN)

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case "$AR" in
	"")
		AC_MSG_ERROR([
ar program not found.  Please fix your PATH to include the directory in
which ar resides, or set AR in the environment with the full path to ar.
])

		;;
esac

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#
# Etags.
#
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AC_PATH_PROGS(ETAGS, etags emacs-etags)
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#
# Some systems, e.g. RH7, have the Exuberant Ctags etags instead of
# GNU emacs etags, and it requires the -L flag.
#
if test "X$ETAGS" != "X"; then
	AC_MSG_CHECKING(for Exuberant Ctags etags)
	if $ETAGS --version 2>&1 | grep 'Exuberant Ctags' >/dev/null 2>&1; then
		AC_MSG_RESULT(yes)
		ETAGS="$ETAGS -L"
	else
		AC_MSG_RESULT(no)
	fi
fi
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AC_SUBST(ETAGS)

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#
# Perl is optional; it is used only by some of the system test scripts.
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# Note: the backtrace feature (see below) uses perl to build the symbol table,
# but it still compiles without perl, in which case an empty table will be used.
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#
AC_PATH_PROGS(PERL, perl5 perl)
AC_SUBST(PERL)

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#
# Python is also optional; it is used by the tools in bin/python.
# If python is unavailable, we simply don't build those.
#
AC_ARG_WITH(python,
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[  --with-python=PATH      specify path to python interpreter],
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    use_python="$withval", use_python="unspec")

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python="python python3 python3.4 python3.3 python3.2 python3.1 python3.0 python2 python2.7 python2.6 python2.5 python2.4"
testscript='try: import argparse
except: exit(1)'
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case "$use_python" in
	no)
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		AC_MSG_CHECKING([for python support])
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		AC_MSG_RESULT(disabled)
		;;
	unspec|yes|*)
		case "$use_python" in
		unspec|yes|'')
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			for p in $python
			do
				AC_PATH_PROGS(PYTHON, $p)
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				if test "X$PYTHON" = "X"; then
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					continue;
				fi
				AC_MSG_CHECKING([python module 'argparse'])
				if ${PYTHON:-false} -c "$testscript"; then
					AC_MSG_RESULT([found, using $PYTHON])
					break
				fi
				AC_MSG_RESULT([not found])
				unset ac_cv_path_PYTHON
				unset PYTHON
			done
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			if test "X$PYTHON" = "X"
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			then
				AC_MSG_CHECKING([for python support])
				case "$use_python" in
				unspec)
					AC_MSG_RESULT(disabled)
					;;
				yes)
					AC_MSG_ERROR([missing python])
					;;
				esac
			fi
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			;;
		*)
			case "$use_python" in
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			/*)
				PYTHON="$use_python"
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				;;
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			*)
				AC_PATH_PROGS(PYTHON, $use_python)
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				;;
			esac
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			AC_MSG_CHECKING([python module 'argparse'])
			if ${PYTHON:-false} -c "$testscript"; then
				AC_MSG_RESULT([found, using $PYTHON])
				break
			else
				AC_MSG_ERROR([not found])
			fi
			;;
		esac
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		;;
esac

PYTHON_TOOLS=''
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CHECKDS=''
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COVERAGE=''
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if test "X$PYTHON" != "X"; then
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	PYTHON_TOOLS=python
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	CHECKDS=checkds
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	COVERAGE=coverage
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fi
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AC_SUBST(CHECKDS)
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AC_SUBST(COVERAGE)
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AC_SUBST(PYTHON_TOOLS)

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#
# Special processing of paths depending on whether --prefix,
# --sysconfdir or --localstatedir arguments were given.  What's
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# desired is some compatibility with the way previous versions
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# of BIND built; they defaulted to /usr/local for most parts of
# the installation, but named.boot/named.conf was in /etc
# and named.pid was in /var/run.
#
# So ... if none of --prefix, --sysconfdir or --localstatedir are
# specified, set things up that way.  If --prefix is given, use
# it for sysconfdir and localstatedir the way configure normally
# would.  To change the prefix for everything but leave named.conf
# in /etc or named.pid in /var/run, then do this the usual configure way:
# ./configure --prefix=/somewhere --sysconfdir=/etc
# ./configure --prefix=/somewhere --localstatedir=/var
#
# To put named.conf and named.pid in /usr/local with everything else,
# set the prefix explicitly to /usr/local even though that's the default:
# ./configure --prefix=/usr/local
#
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case "$prefix" in
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	NONE)
		case "$sysconfdir" in
			'${prefix}/etc')
				sysconfdir=/etc
				;;
		esac
		case "$localstatedir" in
			'${prefix}/var')
				localstatedir=/var
				;;
		esac
		;;
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esac

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#
# Make sure INSTALL uses an absolute path, else it will be wrong in all
# Makefiles, since they use make/rules.in and INSTALL will be adjusted by
# configure based on the location of the file where it is substituted.
# Since in BIND9 INSTALL is only substituted into make/rules.in, an immediate
# subdirectory of install-sh, This relative path will be wrong for all
# directories more than one level down from install-sh.
#
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case "$INSTALL" in
	/*)
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		;;
	*)
		#
		# Not all systems have dirname.
		#
		changequote({, })
		ac_dir="`echo $INSTALL | sed 's%/[^/]*$%%'`"
		changequote([, ])

		ac_prog="`echo $INSTALL | sed 's%.*/%%'`"
		test "$ac_dir" = "$ac_prog" && ac_dir=.
		test -d "$ac_dir" && ac_dir="`(cd \"$ac_dir\" && pwd)`"
		INSTALL="$ac_dir/$ac_prog"
		;;
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esac

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#
# On these hosts, we really want to use cc, not gcc, even if it is
# found.  The gcc that these systems have will not correctly handle
# pthreads.
#
# However, if the user sets $CC to be something, let that override
# our change.
#
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if test "X$CC" = "X" ; then
	case "$host" in
		*-dec-osf*)
			CC="cc"
			;;
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		*-solaris*)
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			# Use Sun's cc if it is available, but watch
			# out for /usr/ucb/cc; it will never be the right
			# compiler to use.
			#
			# If setting CC here fails, the AC_PROG_CC done
			# below might still find gcc.
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			IFS="${IFS=	}"; ac_save_ifs="$IFS"; IFS=":"
			for ac_dir in $PATH; do
				test -z "$ac_dir" && ac_dir=.
				case "$ac_dir" in
				/usr/ucb)
					# exclude
					;;
				*)
					if test -f "$ac_dir/cc"; then
						CC="$ac_dir/cc"
						break
					fi
					;;
				esac
			done
			IFS="$ac_save_ifs"
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			;;
		*-hp-hpux*)
			CC="cc"
			;;
		mips-sgi-irix*)
			CC="cc"
			;;
	esac
fi

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AC_PROG_CC

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#
# gcc's optimiser is broken at -02 for ultrasparc
#
if test "$ac_env_CFLAGS_set" != set -a "X$GCC" = "Xyes"; then
	case "$host" in
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	sparc-*)
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		CCFLAGS="-g -O1"
		;;
	esac
fi

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#
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# OS dependent CC flags
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#
case "$host" in
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	# OSF 5.0: recv/send are only available with -D_POSIX_PII_SOCKET or
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	# -D_XOPEN_SOURCE_EXTENDED.
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	*-dec-osf*)
		STD_CDEFINES="$STD_CDEFINES -D_POSIX_PII_SOCKET"
		CPPFLAGS="$CPPFLAGS -D_POSIX_PII_SOCKET"
		;;
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	#HP-UX: need -D_XOPEN_SOURCE_EXTENDED and -lxnet for CMSG macros
	*-hp-hpux*)
		STD_CDEFINES="$STD_CDEFINES -D_XOPEN_SOURCE_EXTENDED"
		CPPFLAGS="$CPPFLAGS -D_XOPEN_SOURCE_EXTENDED"
		LIBS="-lxnet $LIBS"
		;;
	# Solaris: need -D_XPG4_2 and -D__EXTENSIONS__ for CMSG macros
	*-solaris*)
		STD_CDEFINES="$STD_CDEFINES -D_XPG4_2 -D__EXTENSIONS__"
		CPPFLAGS="$CPPFLAGS -D_XPG4_2 -D__EXTENSIONS__"
		;;
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	# POSIX doesn't include the IPv6 Advanced Socket API and glibc hides
	# parts of the IPv6 Advanced Socket API as a result.  This is stupid
	# as it breaks how the two halves (Basic and Advanced) of the IPv6
	# Socket API were designed to be used but we have to live with it.
	# Define _GNU_SOURCE to pull in the IPv6 Advanced Socket API.
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	*-linux* | *-kfreebsd*-gnu*)
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		STD_CDEFINES="$STD_CDEFINES -D_GNU_SOURCE"
		CPPFLAGS="$CPPFLAGS -D_GNU_SOURCE"
		;;
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	#
	# Starting with OSX 10.7 (Lion) we must choose which IPv6 API to use.
	# Setting this is sufficient to select the correct behavior for BIND 9.
	#
	*-darwin*)
	  STD_CDEFINES="$STD_CDEFINES -D__APPLE_USE_RFC_3542"
	  CPPFLAGS="$CPPFLAGS -D__APPLE_USE_RFC_3542"
	  ;;
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esac

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#
# CCNOOPT defaults to -O0 on gcc and disables optimization when is last
#
if test "X$CCNOOPT" = "X" -a "X$GCC" = "Xyes"; then
	CCNOOPT="-O0"
fi

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AC_HEADER_STDC

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AC_CHECK_HEADERS(fcntl.h regex.h sys/time.h unistd.h sys/mman.h sys/sockio.h sys/select.h sys/param.h sys/sysctl.h net/if6.h sys/socket.h net/route.h linux/netlink.h linux/rtnetlink.h,,,
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[$ac_includes_default
#ifdef HAVE_SYS_PARAM_H
# include <sys/param.h>
#endif
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#ifdef HAVE_SYS_SOCKET_H
# include <sys/socket.h>
#endif
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])
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AC_C_CONST
AC_C_INLINE
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AC_C_VOLATILE
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AC_CHECK_FUNC(sysctlbyname, AC_DEFINE(HAVE_SYSCTLBYNAME))
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AC_C_FLEXIBLE_ARRAY_MEMBER
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#
# Check for the existence of mmap to enable the fast format zones
#
AC_CHECK_FUNCS(mmap)

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#
# Older versions of HP/UX don't define seteuid() and setegid()
#
AC_CHECK_FUNCS(seteuid setresuid)
AC_CHECK_FUNCS(setegid setresgid)

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# BSDI doesn't have ftello fseeko
AC_CHECK_FUNCS(ftello fseeko)

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#
# UnixWare 7.1.1 with the feature supplement to the UDK compiler
# is reported to not support "static inline" (RT #1212).
#
AC_MSG_CHECKING(for static inline breakage)
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AC_TRY_COMPILE([
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	static inline int foo1() {
		return 0;
	}

	static inline int foo2() {
		return foo1();
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	}
	], [foo1();],
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	[AC_MSG_RESULT(no)],
	[AC_MSG_RESULT(yes)
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	 AC_DEFINE(inline, ,[Define to empty if your compiler does not support "static inline".])])
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AC_TYPE_SIZE_T
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AC_CHECK_TYPE(ssize_t, int)
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AC_CHECK_TYPE(uintptr_t,unsigned long)
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AC_CHECK_TYPE(socklen_t,
[AC_DEFINE(ISC_SOCKADDR_LEN_T, socklen_t)],
[
AC_TRY_COMPILE(
[
#include <sys/types.h>
#include <sys/socket.h>
int getsockname(int, struct sockaddr *, size_t *);
],[],
[AC_DEFINE(ISC_SOCKADDR_LEN_T, size_t)],
[AC_DEFINE(ISC_SOCKADDR_LEN_T, int)])
],
[
#include <sys/types.h>
#include <sys/socket.h>
])
AC_SUBST(ISC_SOCKADDR_LEN_T)
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AC_HEADER_TIME
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AC_MSG_CHECKING(for long long)
AC_TRY_COMPILE([],[long long i = 0; return (0);],
	[AC_MSG_RESULT(yes)
		ISC_PLATFORM_HAVELONGLONG="#define ISC_PLATFORM_HAVELONGLONG 1"],
	[AC_MSG_RESULT(no)
		ISC_PLATFORM_HAVELONGLONG="#undef ISC_PLATFORM_HAVELONGLONG"])
AC_SUBST(ISC_PLATFORM_HAVELONGLONG)
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#
# check for GCC noreturn attribute
#
AC_MSG_CHECKING(for GCC noreturn attribute)
AC_TRY_COMPILE([],[void foo() __attribute__((noreturn));],
	[AC_MSG_RESULT(yes)
		ISC_PLATFORM_NORETURN_PRE="#define ISC_PLATFORM_NORETURN_PRE"
		ISC_PLATFORM_NORETURN_POST="#define ISC_PLATFORM_NORETURN_POST __attribute__((noreturn))"],
	[AC_MSG_RESULT(no)
		ISC_PLATFORM_NORETURN_PRE="#define ISC_PLATFORM_NORETURN_PRE"
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		ISC_PLATFORM_NORETURN_POST="#define ISC_PLATFORM_NORETURN_POST"])
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AC_SUBST(ISC_PLATFORM_NORETURN_PRE)
AC_SUBST(ISC_PLATFORM_NORETURN_POST)

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#
# check if we have lifconf
#
AC_MSG_CHECKING(for struct lifconf)
AC_TRY_COMPILE([
#include <sys/types.h>
#include <sys/socket.h>
#include <net/if.h>
],
[
struct lifconf lifconf;
lifconf.lifc_len = 0;
]
,
	[AC_MSG_RESULT(yes)
		ISC_PLATFORM_HAVELIFCONF="#define ISC_PLATFORM_HAVELIFCONF 1"],
	[AC_MSG_RESULT(no)
		ISC_PLATFORM_HAVELIFCONF="#undef ISC_PLATFORM_HAVELIFCONF"])
AC_SUBST(ISC_PLATFORM_HAVELIFCONF)

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#
# check if we have kqueue
#
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AC_ARG_ENABLE(kqueue,
	[  --enable-kqueue         use BSD kqueue when available [[default=yes]]],
	      want_kqueue="$enableval",  want_kqueue="yes")
case $want_kqueue in
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	AC_CHECK_FUNC(kqueue, ac_cv_have_kqueue=yes, ac_cv_have_kqueue=no)
	case $ac_cv_have_kqueue in
	yes)
		ISC_PLATFORM_HAVEKQUEUE="#define ISC_PLATFORM_HAVEKQUEUE 1"
		;;
	*)
		ISC_PLATFORM_HAVEKQUEUE="#undef ISC_PLATFORM_HAVEKQUEUE"
		;;
	esac
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	;;
*)
	ISC_PLATFORM_HAVEKQUEUE="#undef ISC_PLATFORM_HAVEKQUEUE"
	;;
esac
AC_SUBST(ISC_PLATFORM_HAVEKQUEUE)

#
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# check if we have epoll.  Linux kernel 2.4 has epoll_create() which fails,
# so we need to try running the code, not just test its existence.
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#
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AC_ARG_ENABLE(epoll,
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[  --enable-epoll          use Linux epoll when available [[default=auto]]],
	      want_epoll="$enableval",  want_epoll="auto")
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case $want_epoll in
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	AC_MSG_CHECKING(epoll support)
	AC_TRY_RUN([
#include <sys/epoll.h>
int main() {
	if (epoll_create(1) < 0)
		return (1);
	return (0);
}
],
	[AC_MSG_RESULT(yes)
	ISC_PLATFORM_HAVEEPOLL="#define ISC_PLATFORM_HAVEEPOLL 1"],
	[AC_MSG_RESULT(no)
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	ISC_PLATFORM_HAVEEPOLL="#undef ISC_PLATFORM_HAVEEPOLL"],
	[AC_MSG_RESULT(no)
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	ISC_PLATFORM_HAVEEPOLL="#undef ISC_PLATFORM_HAVEEPOLL"])
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	;;
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yes)
	ISC_PLATFORM_HAVEEPOLL="#define ISC_PLATFORM_HAVEEPOLL 1"
	;;
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*)
	ISC_PLATFORM_HAVEEPOLL="#undef ISC_PLATFORM_HAVEEPOLL"
	;;
esac
AC_SUBST(ISC_PLATFORM_HAVEEPOLL)

#
# check if we support /dev/poll
#
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AC_ARG_ENABLE(devpoll,
	[  --enable-devpoll        use /dev/poll when available [[default=yes]]],
	      want_devpoll="$enableval",  want_devpoll="yes")
case $want_devpoll in
yes)
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	AC_CHECK_HEADERS(sys/devpoll.h devpoll.h,
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	ISC_PLATFORM_HAVEDEVPOLL="#define ISC_PLATFORM_HAVEDEVPOLL 1"
	,
	ISC_PLATFORM_HAVEDEVPOLL="#undef ISC_PLATFORM_HAVEDEVPOLL"
	)
	;;
*)
	ISC_PLATFORM_HAVEDEVPOLL="#undef ISC_PLATFORM_HAVEDEVPOLL"
	;;
esac
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AC_SUBST(ISC_PLATFORM_HAVEDEVPOLL)
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#
# check if we need to #include sys/select.h explicitly
#
case $ac_cv_header_unistd_h in
yes)
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AC_MSG_CHECKING(if unistd.h or sys/types.h defines fd_set)
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AC_TRY_COMPILE([
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#include <unistd.h>],
[fd_set read_set; return (0);],
	[AC_MSG_RESULT(yes)
	 ISC_PLATFORM_NEEDSYSSELECTH="#undef ISC_PLATFORM_NEEDSYSSELECTH"
	 LWRES_PLATFORM_NEEDSYSSELECTH="#undef LWRES_PLATFORM_NEEDSYSSELECTH"],
	[AC_MSG_RESULT(no)
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	case $ac_cv_header_sys_select_h in
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	yes)
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	 ISC_PLATFORM_NEEDSYSSELECTH="#define ISC_PLATFORM_NEEDSYSSELECTH 1"
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	 LWRES_PLATFORM_NEEDSYSSELECTH="#define LWRES_PLATFORM_NEEDSYSSELECTH 1"
		;;
	no)
		AC_MSG_ERROR([need either working unistd.h or sys/select.h])
		;;
	esac
	])
	;;
no)
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	case $ac_cv_header_sys_select_h in
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	yes)
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	     ISC_PLATFORM_NEEDSYSSELECTH="#define ISC_PLATFORM_NEEDSYSSELECTH 1"
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	     LWRES_PLATFORM_NEEDSYSSELECTH="#define LWRES_PLATFORM_NEEDSYSSELECTH 1"
		;;
	no)
		AC_MSG_ERROR([need either unistd.h or sys/select.h])
		;;
	esac
	;;
esac
AC_SUBST(ISC_PLATFORM_NEEDSYSSELECTH)
AC_SUBST(LWRES_PLATFORM_NEEDSYSSELECTH)

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#
# Find the machine's endian flavor.
#
AC_C_BIGENDIAN

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#
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# GeoIP support?
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#
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GEOIPLINKSRCS=
GEOIPLINKOBJS=
AC_ARG_WITH(geoip,
[  --with-geoip=PATH       Build with GeoIP support (yes|no|path)],
    use_geoip="$withval", use_geoip="no")
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if test "$use_geoip" = "yes"
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then
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	for d in /usr /usr/local /opt/local
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	do
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		if test -f $d/include/GeoIP.h
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		then
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			use_geoip=$d
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			break
		fi
	done
fi
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case "$use_geoip" in
	no|'')
		AC_MSG_CHECKING([for GeoIP support])
		AC_MSG_RESULT([disabled])
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		;;
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	*)
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		if test -d "$use_geoip" -o -L "$use_geoip"
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		then
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			CFLAGS="$CFLAGS -I$use_geoip/include"
			CPPFLAGS="$CPPFLAGS -I$use_geoip/include"
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			LIBS="$LIBS -L$use_geoip/lib"
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			case "$host_os" in
				netbsd*|openbsd*|solaris*)
					LIBS="$LIBS -Wl,-rpath=$use_geoip/lib"
					;;
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			esac
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		elif test "$use_geoip" = "yes"
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		then
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			AC_MSG_ERROR([GeoIP path not found])
		else
			AC_MSG_ERROR([GeoIP path $use_geoip does not exist])
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		fi
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		AC_CHECK_HEADER(GeoIP.h, [],
			[AC_MSG_ERROR([GeoIP header file not found])]
		)
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		AC_SEARCH_LIBS(GeoIP_id_by_addr_gl, GeoIP, [],
			[AC_MSG_ERROR([suitable GeoIP library not found])]
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		)
		AC_SEARCH_LIBS(fabsf, m, [],
			[AC_MSG_ERROR([Math library not found])]
		)
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		AC_DEFINE(HAVE_GEOIP, 1, Build with GeoIP support)
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		GEOIPLINKSRCS='${GEOIPLINKSRCS}'
		GEOIPLINKOBJS='${GEOIPLINKOBJS}'
		AC_MSG_CHECKING([for GeoIP support])
		AC_MSG_RESULT([yes])
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		AC_MSG_CHECKING([for GeoIP Country IPv6 support])
		AC_COMPILE_IFELSE(
			[AC_LANG_PROGRAM([
				#include <GeoIP.h>
				#include <netinet/in.h>
			], [
				struct in6_addr in6;
				GeoIP_country_name_by_ipnum_v6(NULL, in6);
			])],
			[
				AC_MSG_RESULT([yes])
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				AC_DEFINE(HAVE_GEOIP_V6, 1, Build with GeoIP Country IPv6 support)
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			],
			[AC_MSG_RESULT([no])]
		)
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		AC_MSG_CHECKING([for GeoIP City IPv6 support])
		AC_COMPILE_IFELSE(
			[AC_LANG_PROGRAM([
				#include <GeoIP.h>
				#include <GeoIPCity.h>
				#include <netinet/in.h>
			], [
				struct in6_addr in6;
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				int i = GEOIP_CITY_EDITION_REV0_V6;
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				GeoIP_record_by_ipnum_v6(NULL, in6);
			])],
			[
				AC_MSG_RESULT([yes])
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				AC_DEFINE(HAVE_GEOIP_CITY_V6, 1, Build with GeoIP City IPv6 support)
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			],
			[AC_MSG_RESULT([no])]
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		)
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		;;
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esac
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AC_SUBST(GEOIPLINKSRCS)
AC_SUBST(GEOIPLINKOBJS)
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AC_MSG_CHECKING(for GSSAPI library)
AC_ARG_WITH(gssapi,
[  --with-gssapi=PATH      Specify path for system-supplied GSSAPI [[default=yes]]],
    use_gssapi="$withval", use_gssapi="yes")
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# gssapi is just the framework, we really require kerberos v5, so
# look for those headers (the gssapi headers must be there, too)
# The problem with this implementation is that it doesn't allow
# for the specification of gssapi and krb5 headers in different locations,
# which probably ought to be fixed although fixing might raise the issue of
# trying to build with incompatible versions of gssapi and krb5.
if test "$use_gssapi" = "yes"
then
	# first, deal with the obvious
	if test \( -f /usr/include/kerberosv5/krb5.h -o \
		   -f /usr/include/krb5/krb5.h -o \
		   -f /usr/include/krb5.h \)   -a \
		\( -f /usr/include/gssapi.h -o \
		   -f /usr/include/gssapi/gssapi.h \)
	then
		use_gssapi=/usr
	else
	    krb5dirs="/usr/local /usr/local/krb5 /usr/local/kerberosv5 /usr/local/kerberos /usr/pkg /usr/krb5 /usr/kerberosv5 /usr/kerberos /usr"
	    for d in $krb5dirs
	    do
		if test -f $d/include/gssapi/gssapi_krb5.h -o \
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			-f $d/include/krb5.h
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		then
			if test -f $d/include/gssapi/gssapi.h -o \
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				-f $d/include/gssapi.h
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			then
				use_gssapi=$d
				break
			fi
		fi
		use_gssapi="no"
	    done
	fi
fi
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case "$use_gssapi" in
	no)
		AC_MSG_RESULT(disabled)
		USE_GSSAPI=''
		;;
	yes)
		AC_MSG_ERROR([--with-gssapi must specify a path])
		;;
	*)
		AC_MSG_RESULT(looking in $use_gssapi/lib)
		USE_GSSAPI='-DGSSAPI'
		saved_cppflags="$CPPFLAGS"
		CPPFLAGS="-I$use_gssapi/include $CPPFLAGS"
		AC_CHECK_HEADERS(gssapi.h gssapi/gssapi.h,
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		    [ISC_PLATFORM_GSSAPIHEADER="#define ISC_PLATFORM_GSSAPIHEADER <$ac_header>"
		     gssapi_hack="#include <$ac_header>"])
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		if test "$ISC_PLATFORM_GSSAPIHEADER" = ""; then
		    AC_MSG_ERROR([gssapi.h not found])
		fi
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		AC_CHECK_HEADERS(gssapi_krb5.h gssapi/gssapi_krb5.h,
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		    [ISC_PLATFORM_GSSAPI_KRB5_HEADER="#define ISC_PLATFORM_GSSAPI_KRB5_HEADER <$ac_header>"
		     gssapi_krb5_hack="#include <$ac_header>"])
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		AC_CHECK_HEADERS(krb5.h krb5/krb5.h kerberosv5/krb5.h,
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		    [ISC_PLATFORM_KRB5HEADER="#define ISC_PLATFORM_KRB5HEADER <$ac_header>"
		    krb5_hack="#include <$ac_header>"])
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		if test "$ISC_PLATFORM_KRB5HEADER" = ""; then
		    AC_MSG_ERROR([krb5.h not found])
		fi

		#
		# XXXDCL This probably doesn't work right on all systems.
		# It will need to be worked on as problems become evident.
		#
		# Essentially the problems here relate to two different
		# areas.  The first area is building with either KTH
		# or MIT Kerberos, particularly when both are present on
		# the machine.  The other is static versus dynamic linking.
		#
		# On the KTH vs MIT issue, Both have libkrb5 that can mess
		# up the works if one implementation ends up trying to
		# use the other's krb.  This is unfortunately a situation
		# that very easily arises.
		#
		# Dynamic linking when the dependency information is built
		# into MIT's libgssapi_krb5 or KTH's libgssapi magically makes
		# all such problems go away, but when that setup is not
		# present, because either the dynamic libraries lack
		# dependencies or static linking is being done, then the
		# problems start to show up.
		saved_libs="$LIBS"
		for TRY_LIBS in \
		    "-lgssapi_krb5" \
		    "-lgssapi_krb5 -lkrb5 -lk5crypto -lcom_err" \
		    "-lgssapi_krb5 -lkrb5 -lk5crypto -lcom_err -lresolv" \
		    "-lgssapi" \
		    "-lgssapi -lkrb5 -ldes -lcrypt -lasn1 -lroken -lcom_err" \
		    "-lgssapi -lkrb5 -lcrypto -lcrypt -lasn1 -lroken -lcom_err" \
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		    "-lgssapi -lkrb5 -lgssapi_krb5 -lcrypto -lcrypt -lasn1 -lroken -lcom_err" \
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		    "-lgssapi -lkrb5 -lhx509 -lcrypto -lcrypt -lasn1 -lroken -lcom_err" \
		    "-lgss -lkrb5"
		do
		    # Note that this does not include $saved_libs, because
		    # on FreeBSD machines this configure script has added
		    # -L/usr/local/lib to LIBS, which can make the
		    # -lgssapi_krb5 test succeed with shared libraries even
		    # when you are trying to build with KTH in /usr/lib.
		    if test "$use_gssapi" = "/usr"
		    then
			    LIBS="$TRY_LIBS"
		    else
			    LIBS="-L$use_gssapi/lib $TRY_LIBS"
		    fi
		    AC_MSG_CHECKING(linking as $TRY_LIBS)
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		    AC_TRY_LINK([
#include <sys/types.h>
$gssapi_hack
$gssapi_krb5_hack
$krb5_hack
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				] , [gss_acquire_cred(NULL, NULL, 0, NULL, 0, NULL, NULL, NULL);krb5_init_context(NULL);
#if defined(HAVE_GSSAPI_KRB5_H) || defined(HAVE_GSSAPI_GSSAPI_KRB5_H)
gsskrb5_register_acceptor_identity(NULL);
#endif],
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				gssapi_linked=yes, gssapi_linked=no)
		    case $gssapi_linked in
		    yes) AC_MSG_RESULT(yes); break ;;
		    no)  AC_MSG_RESULT(no) ;;
		    esac
		done

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		CPPFLAGS="$saved_cppflags"

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		case $gssapi_linked in
		no) AC_MSG_ERROR(could not determine proper GSSAPI linkage) ;;
		esac

		#
		# XXXDCL Major kludge.  Tries to cope with KTH in /usr/lib
		# but MIT in /usr/local/lib and trying to build with KTH.
		# /usr/local/lib can end up earlier on the link lines.
		# Like most kludges, this one is not only inelegant it
		# is also likely to be the wrong thing to do at least as
		# many times as it is the right thing.  Something better
		# needs to be done.
		#
		if test "$use_gssapi" = "/usr" -a \
			-f /usr/local/lib/libkrb5.a; then
		    FIX_KTH_VS_MIT=yes
		fi

		case "$FIX_KTH_VS_MIT" in
		yes)
		    case "$enable_static_linking" in
		    yes) gssapi_lib_suffix=".a"  ;;
		    *)   gssapi_lib_suffix=".so" ;;
		    esac

		    for lib in $LIBS; do
			case $lib in
			-L*)
			    ;;
			-l*)
			    new_lib=`echo $lib |
				     sed -e s%^-l%$use_gssapi/lib/lib% \
					 -e s%$%$gssapi_lib_suffix%`
			    NEW_LIBS="$NEW_LIBS $new_lib"
			    ;;
			*)
			   AC_MSG_ERROR([KTH vs MIT Kerberos confusion!])
			    ;;
			esac
		    done
		    LIBS="$NEW_LIBS"
		    ;;
		esac

		DST_GSSAPI_INC="-I$use_gssapi/include"
		DNS_GSSAPI_LIBS="$LIBS"

		AC_MSG_RESULT(using GSSAPI from $use_gssapi/lib and $use_gssapi/include)
		LIBS="$saved_libs"
		;;
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esac
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AC_SUBST(ISC_PLATFORM_HAVEGSSAPI)
AC_SUBST(ISC_PLATFORM_GSSAPIHEADER)
AC_SUBST(ISC_PLATFORM_GSSAPI_KRB5_HEADER)
AC_SUBST(ISC_PLATFORM_KRB5HEADER)

AC_SUBST(USE_GSSAPI)
AC_SUBST(DST_GSSAPI_INC)
AC_SUBST(DNS_GSSAPI_LIBS)
DNS_CRYPTO_LIBS="$DNS_GSSAPI_LIBS $DNS_CRYPTO_LIBS"

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#
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# Applications linking with libdns also need to link with these libraries.
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#

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AC_SUBST(DNS_CRYPTO_LIBS)
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#
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# was --with-randomdev specified?
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#
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AC_MSG_CHECKING(for random device)
AC_ARG_WITH(randomdev,
[  --with-randomdev=PATH   Specify path for random device],
    use_randomdev="$withval", use_randomdev="unspec")
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case "$use_randomdev" in
	unspec)
		case "$cross_compiling" in
		yes)
			AC_MSG_RESULT(unspecified)
			AC_MSG_ERROR([ need --with-randomdev=PATH or --with-randomdev=no])
		esac
		case "$host" in
			*-openbsd*)
				devrandom=/dev/arandom
				;;
			*)
				devrandom=/dev/random
				;;
		esac
		AC_MSG_RESULT($devrandom)
		AC_CHECK_FILE($devrandom,
			      AC_DEFINE_UNQUOTED(PATH_RANDOMDEV,
						 "$devrandom"),)
			      
		;;
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	yes)
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		AC_MSG_ERROR([--with-randomdev must specify a path])
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		;;
	no)
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		AC_MSG_RESULT(disabled)
		;;
	*)
		AC_DEFINE_UNQUOTED(PATH_RANDOMDEV, "$use_randomdev")
		AC_MSG_RESULT(using "$use_randomdev")
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		;;
esac

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#
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# Only check dsa signature generation on these platforms when performing
# system tests.
#
CHECK_DSA=0
if grep "#define PATH_RANDOMDEV " confdefs.h > /dev/null
then
	case "$host" in
	*darwin*|*freebsd*)
		CHECK_DSA=1
		;;
	esac
fi
AC_SUBST(CHECK_DSA)

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#
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# Do we have arc4random(), etc ? arc4random_addrandom() has been removed
# from OpenBSD 5.5 onwards.
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#
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AC_CHECK_FUNC(arc4random, AC_DEFINE(HAVE_ARC4RANDOM))
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AC_CHECK_FUNC(arc4random_addrandom, AC_DEFINE(HAVE_ARC4RANDOM_ADDRANDOM))
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sinclude(config.threads.in)dnl
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if $use_threads
then
	if test "X$GCC" = "Xyes"; then
		case "$host" in
		*-freebsd*)
			CC="$CC -pthread"
			CCOPT="$CCOPT -pthread"
			CCNOOPT="$CCNOOPT -pthread"
			STD_CDEFINES="$STD_CDEFINES -D_THREAD_SAFE"
			;;
		*-openbsd*)
			CC="$CC -pthread"
			CCOPT="$CCOPT -pthread"
			CCNOOPT="$CCNOOPT -pthread"
			;;
		*-solaris*)
			LIBS="$LIBS -lthread"
			;;
		*-ibm-aix*)
			STD_CDEFINES="$STD_CDEFINES -D_THREAD_SAFE"
			;;
		esac
	else
		case $host in
		*-dec-osf*)
			CC="$CC -pthread"
			CCOPT="$CCOPT -pthread"
			CCNOOPT="$CCNOOPT -pthread"
			;;
		*-solaris*)
			CC="$CC -mt"
			CCOPT="$CCOPT -mt"
			CCNOOPT="$CCNOOPT -mt"
			;;
		*-ibm-aix*)
			STD_CDEFINES="$STD_CDEFINES -D_THREAD_SAFE"
			;;
		*-sco-sysv*uw*|*-*-sysv*UnixWare*)
			CC="$CC -Kthread"
			CCOPT="$CCOPT -Kthread"
			CCNOOPT="$CCNOOPT -Kthread"
			;;
		*-*-sysv*OpenUNIX*)
			CC="$CC -Kpthread"
			CCOPT="$CCOPT -Kpthread"
			CCNOOPT="$CCNOOPT -Kpthread"
			;;
		esac
	fi
	ALWAYS_DEFINES="-D_REENTRANT"
	ISC_PLATFORM_USETHREADS="#define ISC_PLATFORM_USETHREADS 1"
	THREADOPTOBJS='${THREADOPTOBJS}'
	THREADOPTSRCS='${THREADOPTSRCS}'
	thread_dir=pthreads
	#
	# We'd like to use sigwait() too
	#
	AC_CHECK_FUNC(sigwait,
		      AC_DEFINE(HAVE_SIGWAIT),
		      AC_CHECK_LIB(c, sigwait,
		      AC_DEFINE(HAVE_SIGWAIT),
		      AC_CHECK_LIB(pthread, sigwait,
				   AC_DEFINE(HAVE_SIGWAIT),
				   AC_CHECK_LIB(pthread, _Psigwait,
						AC_DEFINE(HAVE_SIGWAIT),))))
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	AC_CHECK_FUNC(pthread_attr_getstacksize,
		      AC_DEFINE(HAVE_PTHREAD_ATTR_GETSTACKSIZE),)
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	AC_CHECK_FUNC(pthread_attr_setstacksize,
		      AC_DEFINE(HAVE_PTHREAD_ATTR_SETSTACKSIZE),)
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        AC_ARG_WITH(locktype,
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                [  --with-locktype=ARG     Specify mutex lock type (adaptive or standard)],
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                locktype="$withval", locktype="adaptive")

        case "$locktype" in
                adaptive)
                        AC_MSG_CHECKING([for PTHREAD_MUTEX_ADAPTIVE_NP])

                        AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
                          #define _GNU_SOURCE
                          #include <pthread.h>
                        ]], [[
                          return (PTHREAD_MUTEX_ADAPTIVE_NP);
                        ]])],
                        [ AC_MSG_RESULT(using adaptive lock type)
                          AC_DEFINE([HAVE_PTHREAD_MUTEX_ADAPTIVE_NP], 1,
                                    [Support for PTHREAD_MUTEX_ADAPTIVE_NP]) ],
                        [ AC_MSG_RESULT(using standard lock type) ])
                        ;;
                standard)
                        AC_MSG_RESULT(using standard lock type)
                        ;;
                *)
                        AC_MSG_ERROR([You must specify "adaptive" or "standard" for --with-locktype.])
                        ;;
        esac

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	AC_CHECK_HEADERS(sched.h)
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	case "$host" in
	*solaris-*)
		AC_CHECK_LIB(rt, sched_yield)
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		;;
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	esac

	AC_CHECK_FUNCS(sched_yield pthread_yield pthread_yield_np)

	#
	# Additional OS-specific issues related to pthreads and sigwait.
	#
	case "$host" in
		#
		# One more place to look for sigwait.
		#
		*-freebsd*)
			AC_CHECK_LIB(c_r, sigwait, AC_DEFINE(HAVE_SIGWAIT),)
			case $host in
			*-freebsd5.[[012]]|*-freebsd5.[[012]].*);;
			*-freebsd5.[[3456789]]|*-freebsd5.[[3456789]].*)
				AC_DEFINE(NEED_PTHREAD_SCOPE_SYSTEM)
				;;
			*-freebsd6.*)
				AC_DEFINE(NEED_PTHREAD_SCOPE_SYSTEM)
				;;
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			esac
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			;;
		#
		# BSDI 3.0 through 4.0.1 needs pthread_init() to be
		# called before certain pthreads calls.	 This is deprecated
		# in BSD/OS 4.1.
		#
		*-bsdi3.*|*-bsdi4.0*)
			AC_DEFINE(NEED_PTHREAD_INIT)
			;;
		#
		# LinuxThreads requires some changes to the way we
		# deal with signals.
		#
		*-linux*)
			AC_DEFINE(HAVE_LINUXTHREADS)
			;;
		#
		# Ensure the right sigwait() semantics on Solaris and make
		# sure we call pthread_setconcurrency.
		#
		*-solaris*)
			AC_DEFINE(_POSIX_PTHREAD_SEMANTICS)
			AC_CHECK_FUNC(pthread_setconcurrency,
				      AC_DEFINE(CALL_PTHREAD_SETCONCURRENCY))
			;;
		#
		# UnixWare does things its own way.
		#
		*-sco-sysv*uw*|*-*-sysv*UnixWare*|*-*-sysv*OpenUNIX*)
			AC_DEFINE(HAVE_UNIXWARE_SIGWAIT)
			;;
	esac

	#
	# Look for sysconf to allow detection of the number of processors.
	#
	AC_CHECK_FUNC(sysconf, AC_DEFINE(HAVE_SYSCONF),)

else
	ISC_PLATFORM_USETHREADS="#undef ISC_PLATFORM_USETHREADS"
	thread_dir=nothreads
	THREADOPTOBJS=""
	THREADOPTSRCS=""
	ALWAYS_DEFINES=""
fi

AC_SUBST(ALWAYS_DEFINES)
AC_SUBST(ISC_PLATFORM_USETHREADS)
AC_SUBST(THREADOPTOBJS)
AC_SUBST(THREADOPTSRCS)
ISC_THREAD_DIR=$thread_dir
AC_SUBST(ISC_THREAD_DIR)
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AC_MSG_CHECKING(for libtool)
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AC_ARG_WITH(libtool,
	    [  --with-libtool          use GNU libtool],
	    use_libtool="$withval", use_libtool="no")

case $use_libtool in
	yes)
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		AC_MSG_RESULT(yes)
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		AM_PROG_LIBTOOL
		O=lo
		A=la
		LIBTOOL_MKDEP_SED='s;\.o;\.lo;'
		LIBTOOL_MODE_COMPILE='--mode=compile --tag=CC'
		LIBTOOL_MODE_INSTALL='--mode=install --tag=CC'
		LIBTOOL_MODE_LINK='--mode=link --tag=CC'
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		INSTALL_LIBRARY='${INSTALL_PROGRAM}'
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		case "$host" in
		*) LIBTOOL_ALLOW_UNDEFINED= ;;
		esac
		case "$host" in
		*-ibm-aix*) LIBTOOL_IN_MAIN="-Wl,-bI:T_testlist.imp" ;;
		*) LIBTOOL_IN_MAIN= ;;
		esac;
		;;
	*)
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		O=o
		A=a
		LIBTOOL=
		AC_SUBST(LIBTOOL)
		LIBTOOL_MKDEP_SED=
		LIBTOOL_MODE_COMPILE=
		LIBTOOL_MODE_INSTALL=
		LIBTOOL_MODE_LINK=
		LIBTOOL_ALLOW_UNDEFINED=
		LIBTOOL_IN_MAIN=
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		INSTALL_LIBRARY='${INSTALL_DATA}'
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		;;
esac
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AC_SUBST(INSTALL_LIBRARY)
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#
# was --enable-native-pkcs11 specified?
#  (note it implies both --without-openssl and --with-pkcs11)
#
AC_ARG_ENABLE(native-pkcs11,
	[  --enable-native-pkcs11  use native PKCS11 for all crypto [[default=no]]],
	want_native_pkcs11="$enableval", want_native_pkcs11="no")
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#
# was --with-openssl specified?
#
AC_ARG_WITH(openssl,
[  --with-openssl[=PATH]     Build with OpenSSL [yes|no|path].
			  (Crypto is required for DNSSEC)],
    use_openssl="$withval", use_openssl="auto")
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#
# was --with-pkcs11 specified?
#
AC_ARG_WITH(pkcs11,
[  --with-pkcs11[=PATH]      Build with PKCS11 support [yes|no|path]
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			  (PATH is for the PKCS11 provider)],
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   use_pkcs11="$withval", use_pkcs11="auto")
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#
# were --with-ecdsa, --with-gost, --with-aes specified
#
AC_ARG_WITH(ecdsa, [  --with-ecdsa            Crypto ECDSA],
	    with_ecdsa="$withval", with_ecdsa="auto")
AC_ARG_WITH(gost, [  --with-gost             Crypto GOST [yes|no|raw|asn1].],
	    with_gost="$withval", with_gost="auto")
AC_ARG_WITH(aes, [  --with-aes              Crypto AES],
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#
# was --enable-openssl-hash specified?
#
AC_ARG_ENABLE(openssl-hash,
	[  --enable-openssl-hash   use OpenSSL for hash functions [[default=no]]],
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	want_openssl_hash="$enableval", want_openssl_hash="checkcc")
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#
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# Client Cookie algorithm choice
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#
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AC_ARG_WITH(cc-alg,
	[  --with-cc-alg=ALG      choose the algorithm for Client Cookie [[aes|sha1|sha256]]],
	with_cc_alg="$withval", with_cc_alg="auto")
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case $with_cc_alg in
	*1)
		with_cc_alg="sha1"
		;;
	*2*)
		with_cc_alg="sha256"
		;;
	auto)
		if test "$with_aes" != "no"
		then
			with_aes="yes"
		fi
		;;
	*)
		with_cc_alg="aes"
		if test "$with_aes" != "no"
		then
			with_aes="yes"
		fi
		;;
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esac
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if test "with_aes" = "checkcc"
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then
	with_aes="no"
fi

AC_MSG_CHECKING(for OpenSSL library)
OPENSSL_WARNING=
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openssldirs="/usr /usr/local /usr/local/ssl /usr/pkg /usr/sfw"
if test "$use_openssl" = "auto"
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then
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	if test "$want_native_pkcs11" = "yes"
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	then
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		use_openssl="native_pkcs11"
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	else
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		for d in $openssldirs
		do
			if test -f $d/include/openssl/opensslv.h
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			then
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				use_openssl=$d
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				break
			fi
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		done
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	fi
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fi
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OPENSSL_ECDSA=""
OPENSSL_GOST=""
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gosttype="raw"
case "$with_gost" in
	raw)
		with_gost="yes"
		;;
	asn1)
		AC_DEFINE(PREFER_GOSTASN1, 1,
			  [Define if GOST private keys are encoded in ASN.1.])
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		gosttype="asn1"
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		with_gost="yes"
		;;
	auto|yes|no)
		;;
	*)
		AC_MSG_ERROR(unknown GOST private key encoding)
		;;
esac

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case "$use_openssl" in
	native_pkcs11)
		AC_MSG_RESULT(disabled because of native PKCS11)
		DST_OPENSSL_INC=""
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		CRYPTO="-DPKCS11CRYPTO"
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		OPENSSLGOSTLINKOBJS=""
		OPENSSLGOSTLINKSRS=""
		OPENSSLLINKOBJS=""
		OPENSSLLINKSRCS=""
		;;
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	no)
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		AC_MSG_RESULT(no)
		DST_OPENSSL_INC=""
		CRYPTO=""
		OPENSSLGOSTLINKOBJS=""
		OPENSSLGOSTLINKSRS=""
		OPENSSLLINKOBJS=""
		OPENSSLLINKSRCS=""
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		;;
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	auto)
		DST_OPENSSL_INC=""
		CRYPTO=""
		OPENSSLGOSTLINKOBJS=""
		OPENSSLGOSTLINKSRS=""
		OPENSSLLINKOBJS=""
		OPENSSLLINKSRCS=""
		AC_MSG_ERROR(
[OpenSSL was not found in any of $openssldirs; use --with-openssl=/path
If you don't want OpenSSL, use --without-openssl])
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		;;
	*)
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		if test "$want_native_pkcs11" = "yes"
		then
                        AC_MSG_RESULT()
			AC_MSG_ERROR([OpenSSL and native PKCS11 cannot be used together.])
		fi
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		if test "$use_openssl" = "yes"
		then
			# User did not specify a path - guess it
			for d in $openssldirs
			do
				if test -f $d/include/openssl/opensslv.h
				then
					use_openssl=$d
					break
				fi
			done
			if test "$use_openssl" = "yes"
			then
				AC_MSG_RESULT(not found)
				AC_MSG_ERROR(
[OpenSSL was not found in any of $openssldirs; use --with-openssl=/path])
			fi
		elif ! test -f "$use_openssl"/include/openssl/opensslv.h
		then
			AC_MSG_ERROR(["$use_openssl/include/openssl/opensslv.h" not found])
		fi
		CRYPTO='-DOPENSSL'
		if test "$use_openssl" = "/usr"
		then
			DST_OPENSSL_INC=""
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			DST_OPENSSL_LIBS="-lcrypto"
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		else
			DST_OPENSSL_INC="-I$use_openssl/include"
			case $host in
			*-solaris*)
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				DST_OPENSSL_LIBS="-L$use_openssl/lib -R$use_openssl/lib -lcrypto"
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				;;
			*-hp-hpux*)
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				DST_OPENSSL_LIBS="-L$use_openssl/lib -Wl,+b: -lcrypto"
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				;;
			*-apple-darwin*)
				#
				# Apple's ld seaches for serially for dynamic
				# then static libraries.  This means you can't
				# use -L to override dynamic system libraries
				# with static ones when linking.  Instead
				# we specify a absolute path.
				#
				if test -f "$use_openssl/lib/libcrypto.dylib"
				then
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					DST_OPENSSL_LIBS="-L$use_openssl/lib -lcrypto"
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				else
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					DST_OPENSSL_LIBS="$use_openssl/lib/libcrypto.a"
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				fi
				;;
			*)
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				DST_OPENSSL_LIBS="-L$use_openssl/lib -lcrypto"
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				;;
			esac
		fi
		AC_MSG_RESULT(using OpenSSL from $use_openssl/lib and $use_openssl/include)

		saved_cc="$CC"
		saved_cflags="$CFLAGS"
		saved_libs="$LIBS"
		CFLAGS="$CFLAGS $DST_OPENSSL_INC"
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		LIBS="$LIBS $DST_OPENSSL_LIBS"
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		AC_MSG_CHECKING(whether linking with OpenSSL works)
		AC_TRY_RUN([
#include <openssl/err.h>
int main() {
	ERR_clear_error();
	return (0);
}
],
		[AC_MSG_RESULT(yes)],
		[AC_MSG_RESULT(no)
		 AC_MSG_ERROR(Could not run test program using OpenSSL from
$use_openssl/lib and $use_openssl/include.
Please check the argument to --with-openssl and your
shared library configuration (e.g., LD_LIBRARY_PATH).)],
		[AC_MSG_RESULT(assuming it does work on target platform)])

		AC_MSG_CHECKING(whether linking with OpenSSL requires -ldl)
		AC_TRY_LINK([
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#include <openssl/err.h>
#include <openssl/dso.h>
],
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[ DSO_METHOD_dlfcn(); ],
		[AC_MSG_RESULT(no)],
		[LIBS="$LIBS -ldl"
		AC_TRY_LINK([
#include <openssl/err.h>
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#include <openssl/dso.h>
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],[ DSO_METHOD_dlfcn(); ],
		[AC_MSG_RESULT(yes)
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		DST_OPENSSL_LIBS="$DST_OPENSSL_LIBS -ldl"
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		],
		 [AC_MSG_RESULT(unknown)
		 AC_MSG_ERROR(OpenSSL has unsupported dynamic loading)],
		[AC_MSG_RESULT(assuming it does work on target platform)])
		],
		[AC_MSG_RESULT(assuming it does work on target platform)]
		)
		 
AC_ARG_ENABLE(openssl-version-check,
[AC_HELP_STRING([--enable-openssl-version-check],
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	[check OpenSSL version @<:@default=yes@:>@])])
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case "$enable_openssl_version_check" in
yes|'')
		AC_MSG_CHECKING(OpenSSL library version)
		AC_TRY_RUN([
#include <stdio.h>
#include <openssl/opensslv.h>
int main() {
	if ((OPENSSL_VERSION_NUMBER >= 0x009070cfL &&
	     OPENSSL_VERSION_NUMBER < 0x00908000L) ||
	     OPENSSL_VERSION_NUMBER >= 0x0090804fL)
		return (0);
	printf("\n\nFound   OPENSSL_VERSION_NUMBER %#010x\n",
		OPENSSL_VERSION_NUMBER);
	printf("Require OPENSSL_VERSION_NUMBER 0x009070cf or greater (0.9.7l)\n"
	       "Require OPENSSL_VERSION_NUMBER 0x0090804f or greater (0.9.8d)\n\n");
	return (1);
}
		],
		[AC_MSG_RESULT(ok)],
		[AC_MSG_RESULT(not compatible)
		 OPENSSL_WARNING=yes
		],
		[AC_MSG_RESULT(assuming target platform has compatible version)])
;;
no)
	AC_MSG_RESULT(Skipped OpenSSL version check)
;;
esac

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	AC_MSG_CHECKING(for OpenSSL DSA support)
	if test -f $use_openssl/include/openssl/dsa.h
	then
		AC_DEFINE(HAVE_OPENSSL_DSA)
		AC_MSG_RESULT(yes)
	else
		AC_MSG_RESULT(no)
	fi
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	AC_CHECK_FUNCS(EVP_sha256 EVP_sha384 EVP_sha512)
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	AC_MSG_CHECKING(for OpenSSL ECDSA support)
	have_ecdsa=""
	AC_TRY_RUN([
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#include <openssl/ecdsa.h>
#include <openssl/objects.h>
int main() {
	EC_KEY *ec256, *ec384;
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#if !defined(HAVE_EVP_SHA256) || !defined(HAVE_EVP_SHA384)
	return (1);
#endif
	ec256 = EC_KEY_new_by_curve_name(NID_X9_62_prime256v1);
	ec384 = EC_KEY_new_by_curve_name(NID_secp384r1);
	if (ec256 == NULL || ec384 == NULL)
		return (2);
	return (0);
}
],
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	[AC_MSG_RESULT(yes)
	have_ecdsa="yes"],
	[AC_MSG_RESULT(no)
	have_ecdsa="no"],
	[AC_MSG_RESULT(using --with-ecdsa)])
	case "$with_ecdsa" in
	yes)
	    case "$have_ecdsa" in
	    no)  AC_MSG_ERROR([ecdsa not supported]) ;;
	    *)  have_ecdsa=yes ;;
	    esac
	    ;;
	no)
	    have_ecdsa=no ;;
	*)
	    case "$have_ecdsa" in
	    yes|no) ;;
	    *) AC_MSG_ERROR([need --with-ecdsa=[[yes or no]]]) ;;
	    esac
	    ;;
	esac
	case $have_ecdsa in
	yes)
		OPENSSL_ECDSA="yes"
		AC_DEFINE(HAVE_OPENSSL_ECDSA, 1,
			  [Define if your OpenSSL version supports ECDSA.])
		;;
	*)
		;;
	esac

	AC_MSG_CHECKING(for OpenSSL GOST support)
	have_gost=""
	case "$use_pkcs11" in
		auto|no)
			;;
		*)
			if $use_threads; then
				CC="$CC -pthread"
			fi
			;;
	esac
	AC_TRY_RUN([
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#include <openssl/conf.h>
#include <openssl/engine.h>
int main() {
#if (OPENSSL_VERSION_NUMBER >= 0x10000000L)
	ENGINE *e;
	EC_KEY *ek;
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