configure.in

dnl $OpenLDAP$
dnl This work is part of OpenLDAP Software <http://www.openldap.org/>.
dnl
dnl Copyright 1998-2005 The OpenLDAP Foundation.
dnl All rights reserved.
dnl
dnl Redistribution and use in source and binary forms, with or without
dnl modification, are permitted only as authorized by the OpenLDAP
dnl Public License.
dnl
dnl A copy of this license is available in the file LICENSE in the
dnl top-level directory of the distribution or, alternatively, at
dnl <http://www.OpenLDAP.org/license.html>.
dnl
dnl ----------------------------------------------------------------
dnl
dnl Redefine AC_INIT_BINSH to provide RCS IDs and copyright notice
dnl at top of generated configure script.  Prints simple copyright.
define([AC_INIT_BINSH],
[[#! /bin/sh
# $]OpenLDAP[$
# from] translit([$OpenLDAP$], $")] [

# This work is part of OpenLDAP Software <http://www.openldap.org/>.
#
# Copyright 1998-2005 The OpenLDAP Foundation.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted only as authorized by the OpenLDAP
# Public License.
#
# A copy of this license is available in the file LICENSE in the
# top-level directory of the distribution or, alternatively, at
# <http://www.OpenLDAP.org/license.html>.

echo "Copyright 1998-2005 The OpenLDAP Foundation. All rights reserved."
echo "	Restrictions apply, see COPYRIGHT and LICENSE files."
])dnl
dnl ----------------------------------------------------------------
dnl Disable config.cache!
define([AC_CACHE_LOAD], )dnl
define([AC_CACHE_SAVE], )dnl
dnl ================================================================
dnl Configure.in for OpenLDAP
AC_INIT(build/version.sh)dnl

# set unset (borrowed from autoconf 2.49c)
if (OL_FOO=OL_FOO; unset OL_FOO) >/dev/null 2>&1; then
  ol_unset=unset
else
  ol_unset=false
fi
# unset CDPATH
$ol_unset CDPATH || test "${CDPATH+set}" != set || { CDPATH=:; export CDPATH; }

AC_CONFIG_AUX_DIR(build)dnl

eval `$ac_aux_dir/version.sh`
if test -z "$OL_STRING"; then
	AC_MSG_ERROR([could not determine version])
fi

if test -f "$ac_aux_dir/shtool" -a ! -d $ac_aux_dir/shtool; then
	ac_cv_shtool="$ac_aux_dir/shtool"
else
	AC_MSG_ERROR([no shtool found in $ac_aux_dir])
fi

SHTOOL="$ac_cv_shtool"
dnl AC_SUBST(SHTOOL)dnl

TB="`$SHTOOL echo -e '%B' 2>/dev/null`"
TN="`$SHTOOL echo -e '%b' 2>/dev/null`"

OPENLDAP_CVS=""
if test -d $ac_aux_dir/CVS; then
	OPENLDAP_CVS="(from CVS sources) "
fi

echo "Configuring ${TB}${OL_STRING}${TN} ${OPENLDAP_CVS}..."

dnl Determine host platform
dnl		we try not to use this for much
AC_CANONICAL_SYSTEM

AM_INIT_AUTOMAKE([$OL_PACKAGE],[$OL_VERSION], [no defines])dnl
AC_SUBST(PACKAGE)dnl
AC_SUBST(VERSION)dnl
AC_DEFINE_UNQUOTED(OPENLDAP_PACKAGE,"$PACKAGE",Package)
AC_DEFINE_UNQUOTED(OPENLDAP_VERSION,"$VERSION",Version)

AC_DEFINE_UNQUOTED(LDAP_VENDOR_VERSION,$OL_API_INC,Version)
AC_DEFINE_UNQUOTED(LDAP_VENDOR_VERSION_MAJOR,$OL_MAJOR,Major)
AC_DEFINE_UNQUOTED(LDAP_VENDOR_VERSION_MINOR,$OL_MINOR,Minor)
AC_DEFINE_UNQUOTED(LDAP_VENDOR_VERSION_PATCH,$OL_PATCH,Patch)

OPENLDAP_LIBRELEASE=$OL_API_LIB_RELEASE
AC_SUBST(OPENLDAP_LIBRELEASE)dnl

OPENLDAP_LIBVERSION=$OL_API_LIB_VERSION
AC_SUBST(OPENLDAP_LIBVERSION)dnl

OPENLDAP_RELEASE_DATE="$OL_RELEASE_DATE"
AC_SUBST(OPENLDAP_RELEASE_DATE)dnl

dnl We use autoconf features new to 2.13.  Later versions like won't work.
dnl aclocal.m4 should be built using aclocal from automake 1.4
dnl libtool 1.4.3 should be installed.
AC_PREREQ(2.13)dnl Required Autoconf version

AC_CONFIG_HEADER(include/portable.h include/ldap_features.h include/lber_types.h)dnl

dnl ================================================================
dnl Start Args
AC_MSG_CHECKING(configure arguments)
AC_PREFIX_DEFAULT(/usr/local)

top_builddir=`pwd`
AC_SUBST(top_builddir)dnl

dnl ----------------------------------------------------------------
dnl --with-subdir
ldap_subdir="/openldap"

AC_ARG_WITH(subdir,
[  --with-subdir=DIR       change default subdirectory used for installs],
[case "$withval" in
	no) ldap_subdir=""
		;;
	yes)
		;;
	/*|\\*)
		ldap_subdir="$withval"
		;;
	*)
		ldap_subdir="/$withval"
		;;
esac
])dnl

AC_SUBST(ldap_subdir)dnl

dnl ----------------------------------------------------------------
dnl General "enable" options
OL_ARG_ENABLE(debug,[  --enable-debug 	  enable debugging], yes)dnl
OL_ARG_ENABLE(dynamic,[  --enable-dynamic	  enable linking built binaries with dynamic libs], no)dnl
OL_ARG_ENABLE(syslog,[  --enable-syslog	  enable syslog support], auto)dnl
OL_ARG_ENABLE(proctitle,[  --enable-proctitle	  enable proctitle support], yes)dnl
dnl OL_ARG_ENABLE(referrals,[  --enable-referrals	  enable LDAPv2+ Referrals (experimental)], no)dnl
ol_enable_referrals=${ol_enable_referrals-no}
dnl OL_ARG_ENABLE(kbind,[  --enable-kbind	  enable LDAPv2+ Kerberos IV bind (deprecated)], no)dnl
ol_enable_kbind=${ol_enable_kbind-no}
OL_ARG_ENABLE(ipv6,[  --enable-ipv6 	  enable IPv6 support], auto)dnl
OL_ARG_ENABLE(local,[  --enable-local	  enable AF_LOCAL (AF_UNIX) socket support], auto)dnl

dnl ----------------------------------------------------------------
dnl General "with" options
dnl OL_ARG_ENABLE(dmalloc,[  --enable-dmalloc	  enable debug malloc support], no)dnl

OL_ARG_WITH(cyrus_sasl,[  --with-cyrus-sasl	  with Cyrus SASL support],
	auto, [auto yes no] )
OL_ARG_WITH(fetch,[  --with-fetch		  with fetch(3) URL support],
	auto, [auto yes no] )
dnl	OL_ARG_WITH(kerberos,[  --with-kerberos	  with Kerberos support],
dnl		auto, [auto k5 k5only k425 kth k4 afs yes no])
ol_with_kerberos=${ol_with_kerberos-auto}
OL_ARG_WITH(threads,[  --with-threads	  with threads],
	auto, [auto nt posix mach pth lwp yes no manual] )
OL_ARG_WITH(tls,[  --with-tls		  with TLS/SSL support],
	auto, [auto ssleay openssl yes no] )
OL_ARG_WITH(yielding_select,[  --with-yielding-select  with implicitly yielding select],
	auto, [auto yes no manual] )
OL_ARG_WITH(multiple_precision,[  --with-multiple-precision
                          multiple precision support for statistics
			  auto|bignum|gmp],
	auto, [auto bignum gmp yes no] )

dnl ----------------------------------------------------------------
dnl Server options
dnl ----------------------------------------------------------------

dnl ----------------------------------------------------------------
dnl SLAPD OPTIONS
AC_ARG_WITH(xxslapdoptions,[
SLAPD (Standalone LDAP Daemon) Options:])
OL_ARG_ENABLE(slapd,[  --enable-slapd	  enable building slapd], yes)dnl
OL_ARG_ENABLE(aci,[    --enable-aci	  enable per-object ACIs (experimental)], no)dnl
OL_ARG_ENABLE(cleartext,[    --enable-cleartext	  enable cleartext passwords], yes)dnl
OL_ARG_ENABLE(crypt,[    --enable-crypt	  enable crypt(3) passwords], no)dnl
OL_ARG_ENABLE(lmpasswd,[    --enable-lmpasswd	  enable LAN Manager passwords], no)dnl
OL_ARG_ENABLE(spasswd,[    --enable-spasswd	  enable (Cyrus) SASL password verification], no)dnl
OL_ARG_ENABLE(modules,[    --enable-modules	  enable dynamic module support], no)dnl
dnl OL_ARG_ENABLE(multimaster,[    --enable-multimaster  enable multimaster replication], no)dnl
ol_enable_multimaster=${ol_enable_multimaster-no}
OL_ARG_ENABLE(rewrite,[    --enable-rewrite	  enable DN rewriting in back-ldap and the rwm overlay], auto)dnl
OL_ARG_ENABLE(rlookups,[    --enable-rlookups	  enable reverse lookups of client hostnames], no)dnl
OL_ARG_ENABLE(slapi,[    --enable-slapi        enable SLAPI support (experimental)], no)dnl
OL_ARG_ENABLE(slp,[    --enable-slp          enable SLPv2 support], no)dnl     
OL_ARG_ENABLE(wrappers,[    --enable-wrappers	  enable tcp wrapper support], no)dnl

dnl ----------------------------------------------------------------
dnl SLAPD Backend Options
Backends="bdb dnssrv hdb ldap ldbm meta monitor null \
	passwd perl relay shell sql"

AC_ARG_WITH(xxslapbackends,[
SLAPD Backend Options:])

OL_ARG_ENABLE(backends,[    --enable-backends	  enable all available backends no|yes|mod],
	no, [no yes mod])dnl
OL_ARG_ENABLE(bdb,[    --enable-bdb	  enable Berkeley DB backend no|yes|mod],
	yes, [no yes mod])dnl
OL_ARG_ENABLE(dnssrv,[    --enable-dnssrv	  enable dnssrv backend no|yes|mod],
	no, [no yes mod])dnl
OL_ARG_ENABLE(hdb,[    --enable-hdb	  enable Hierarchical DB backend no|yes|mod],
	yes, [no yes mod])dnl
OL_ARG_ENABLE(ldap,[    --enable-ldap	  enable ldap backend no|yes|mod],
	no, [no yes mod])dnl
OL_ARG_ENABLE(ldbm,[    --enable-ldbm	  enable ldbm backend no|yes|mod], no,
	[no yes mod])dnl
OL_ARG_WITH(ldbm_api,[      --with-ldbm-api     with LDBM API auto|berkeley|bcompat|mdbm|gdbm],
	auto, [auto berkeley bcompat mdbm gdbm])
OL_ARG_WITH(ldbm_type,[      --with-ldbm-type	  use LDBM type auto|btree|hash],
	auto, [auto btree hash])
OL_ARG_ENABLE(meta,[    --enable-meta	  enable metadirectory backend no|yes|mod],
	no, [no yes mod])dnl
OL_ARG_ENABLE(monitor,[    --enable-monitor	  enable monitor backend no|yes|mod],
	yes, [no yes mod])dnl
OL_ARG_ENABLE(null,[    --enable-null	  enable null backend no|yes|mod],
	no, [no yes mod])dnl
OL_ARG_ENABLE(passwd,[    --enable-passwd	  enable passwd backend no|yes|mod],
	no, [no yes mod])dnl
OL_ARG_ENABLE(perl,[    --enable-perl	  enable perl backend no|yes|mod],
	no, [no yes mod])dnl
OL_ARG_ENABLE(relay,[    --enable-relay  	  enable relay backend no|yes|mod],
	yes, [no yes mod])dnl
OL_ARG_ENABLE(shell,[    --enable-shell	  enable shell backend no|yes|mod],
	no, [no yes mod])dnl
OL_ARG_ENABLE(sql,[    --enable-sql	  enable sql backend no|yes|mod],
	no, [no yes mod])dnl

dnl ----------------------------------------------------------------
dnl SLAPD Overlay Options
Overlays="denyop dyngroup dynlist glue lastmod ppolicy proxycache \
	refint rwm syncprov translucent unique"

AC_ARG_WITH(xxslapoverlays,[
SLAPD Overlay Options:])

OL_ARG_ENABLE(overlays,[    --enable-overlays	  enable all available overlays no|yes|mod],
	no, [no yes mod])dnl
OL_ARG_ENABLE(denyop,[    --enable-denyop  	  Deny Operation overlay no|yes|mod],
	no, [no yes mod])
OL_ARG_ENABLE(dyngroup,[    --enable-dyngroup	  Dynamic Group overlay no|yes|mod],
	no, [no yes mod])
OL_ARG_ENABLE(dynlist,[    --enable-dynlist	  Dynamic List overlay no|yes|mod],
	no, [no yes mod])
OL_ARG_ENABLE(glue,[    --enable-glue	  Backend Glue overlay no|yes|mod],
	yes, [no yes mod])
OL_ARG_ENABLE(lastmod,[    --enable-lastmod	  Last Modification overlay no|yes|mod],
	no, [no yes mod])
OL_ARG_ENABLE(ppolicy,[    --enable-ppolicy	  Password Policy overlay no|yes|mod],
	no, [no yes mod])
OL_ARG_ENABLE(proxycache,[    --enable-proxycache	  Proxy Cache overlay no|yes|mod],
	no, [no yes mod])
OL_ARG_ENABLE(refint,[    --enable-refint	  Referential Integrity overlay no|yes|mod],
	no, [no yes mod])
OL_ARG_ENABLE(rwm,[    --enable-rwm       	  Rewrite/Remap overlay no|yes|mod],
	no, [no yes mod])
OL_ARG_ENABLE(syncprov,[    --enable-syncprov	  Syncrepl Provider overlay no|yes|mod],
	yes, [no yes mod])
OL_ARG_ENABLE(translucent,[    --enable-translucent  Translucent Proxy overlay no|yes|mod],
	no, [no yes mod])
OL_ARG_ENABLE(unique,[    --enable-unique       Attribute Uniqueness overlay no|yes|mod],
	no, [no yes mod])


dnl ----------------------------------------------------------------
dnl SLURPD OPTIONS
AC_ARG_WITH(xxslurpdoptions,[
SLURPD (Replication Daemon) Options:])
OL_ARG_ENABLE(slurpd,[  --enable-slurpd	  enable building slurpd], auto)dnl

dnl ----------------------------------------------------------------
AC_ARG_WITH(xxliboptions,[
Library Generation & Linking Options])
AC_ENABLE_STATIC
AC_ENABLE_SHARED

dnl ----------------------------------------------------------------

dnl General "enable" options
# Activate any backends that were not explicitly enabled.
# Note that back_bdb defaults to "yes" so this loop won't touch it.
if test $ol_enable_backends != no ; then
	for i in $Backends; do
		eval "ol_tmp=\$ol_enable_$i"
		if test $ol_tmp = no ; then
			eval "ol_enable_$i=$ol_enable_backends"
		fi
	done
fi
# Activate the overlays
if test $ol_enable_overlays != no ; then
	for i in $Overlays; do
		eval "ol_tmp=\$ol_enable_$i"
		if test $ol_tmp = no ; then
			eval "ol_enable_$i=$ol_enable_overlays"
		fi
	done
fi

# validate options
if test $ol_enable_slapd = no ; then
	dnl SLAPD was specificallly disabled
	if test $ol_enable_slapi = yes ; then
		AC_MSG_WARN([slapd disabled, ignoring --enable-slapi argument])
	fi
	if test $ol_enable_backends != no ; then
		AC_MSG_WARN([slapd disabled, ignoring --enable-backends argument])
	fi
	for i in $Backends; do
		eval "ol_tmp=\$ol_enable_$i"
		if test $ol_tmp != no ; then
			AC_MSG_WARN([slapd disabled, ignoring --enable-$i argument])
			eval "ol_enable_$i=no"
		fi
	done
	if test $ol_enable_modules = yes ; then
		AC_MSG_WARN([slapd disabled, ignoring --enable-modules argument])
	fi
	if test $ol_enable_multimaster = yes ; then
		AC_MSG_WARN([slapd disabled, ignoring --enable-multimaster argument])
	fi
	if test $ol_enable_wrappers = yes ; then
		AC_MSG_WARN([slapd disabled, ignoring --enable-wrappers argument])
	fi
	if test $ol_enable_rlookups = yes ; then
		AC_MSG_WARN([slapd disabled, ignoring --enable-rlookups argument])
	fi
	if test $ol_enable_aci = yes ; then
		AC_MSG_WARN([slapd disabled, ignoring --enable-aci argument])
	fi
	if test $ol_with_ldbm_api != auto ; then
		AC_MSG_WARN([slapd disabled, ignoring --with-ldbm-api argument])
	fi
	if test $ol_with_ldbm_type != auto ; then
		AC_MSG_WARN([slapd disabled, ignoring --with-ldbm-type argument])
	fi
	if test $ol_enable_slurpd = yes ; then
		AC_MSG_ERROR([slurpd requires slapd])
	fi
	if test $ol_enable_rewrite = yes ; then
		AC_MSG_WARN([slapd disabled, ignoring --enable-rewrite argument])
	fi
	dnl overlays
	if test $ol_enable_overlays != no ; then
		AC_MSG_WARN([slapd disabled, ignoring --enable-overlays argument])
	fi
	for i in $Overlays; do
		eval "ol_tmp=\$ol_enable_$i"
		if test $ol_tmp != no ; then
			AC_MSG_WARN([slapd disabled, ignoring --enable-$i argument])
			eval "ol_enable_$i=no"
		fi
	done

	# force settings to no
	ol_enable_slapi=no

	ol_enable_backends=no
	ol_enable_overlays=no
	ol_enable_modules=no
	ol_enable_multimaster=no
	ol_enable_rlookups=no
	ol_enable_aci=no
	ol_enable_wrappers=no

	ol_with_ldbm_api=no
	ol_with_ldbm_type=no

	ol_enable_slurpd=no

	ol_enable_rewrite=no

elif test $ol_enable_ldbm = no ; then
	dnl SLAPD without LDBM

	if test $ol_with_ldbm_api != auto ; then
		AC_MSG_WARN([LDBM disabled, ignoring --with-ldbm-api argument])
	fi

	if test $ol_with_ldbm_type != auto ; then
		AC_MSG_WARN([LDBM disabled, ignoring --with-ldbm-type argument])
	fi

	if test $ol_enable_modules != yes -a \
		$ol_enable_bdb = no -a \
		$ol_enable_dnssrv = no -a \
		$ol_enable_hdb = no -a \
		$ol_enable_ldap = no -a \
		$ol_enable_meta = no -a \
		$ol_enable_monitor = no -a \
		$ol_enable_null = no -a \
		$ol_enable_passwd = no -a \
		$ol_enable_perl = no -a \
		$ol_enable_relay = no -a \
		$ol_enable_shell = no -a \
		$ol_enable_sql = no ; then

		if test $ol_enable_slapd = yes ; then
			AC_MSG_ERROR([slapd requires a backend])
		else
			AC_MSG_WARN([skipping slapd, no backend specified])
			ol_enable_slapd=no
		fi
	fi

	ol_with_ldbm_api=no
	ol_with_ldbm_type=no

	if test $ol_enable_bdb != no -o $ol_enable_hdb != no; then
		ol_with_ldbm_api=berkeley
	fi

else
	dnl SLAPD with LDBM
	if test $ol_with_ldbm_api = gdbm -a \
		$ol_with_ldbm_type = btree ; then
		AC_MSG_ERROR([GDBM only supports LDBM type hash])
	fi
	if test $ol_with_ldbm_api = mdbm -a \
		$ol_with_ldbm_type = btree ; then
		AC_MSG_ERROR([MDBM only supports LDBM type hash])
	fi
	if test $ol_with_ldbm_api = ndbm -a \
		$ol_with_ldbm_type = btree ; then
		AC_MSG_ERROR([NDBM only supports LDBM type hash])
	fi

	if test $ol_enable_bdb != no -o $ol_enable_hdb != no ; then
		if test $ol_with_ldbm_api = auto ; then
			ol_with_ldbm_api=berkeley
		elif test $ol_with_ldbm_api != berkeley ; then
			AC_MSG_ERROR([LDBM API not compatible with BDB/HDB])
		fi
	fi
fi

if test $ol_enable_meta = yes -a $ol_enable_ldap = no ; then
	AC_MSG_ERROR([--enable-meta requires --enable-ldap])
fi

if test $ol_enable_slurpd = yes ; then
	dnl SLURPD was specifically enabled
	if test $ol_with_threads = no ; then
		AC_MSG_ERROR([slurpd requires threads])
	fi
fi

if test $ol_enable_lmpasswd = yes ; then
	if test $ol_with_tls = no ; then
		AC_MSG_ERROR([LAN Manager passwords require OpenSSL])
	fi
fi

if test $ol_enable_kbind = yes ; then
	if test $ol_with_kerberos = no ; then
		AC_MSG_ERROR([options require --with-kerberos])
	elif test $ol_with_kerberos = auto ; then
		ol_with_kerberos=yes
	fi

elif test $ol_enable_kbind = no ; then
	if test $ol_with_kerberos = auto ; then
		ol_with_kerberos=no
	elif test $ol_with_kerberos != no ; then
		AC_MSG_WARN([Kerberos detection enabled unnecessarily]);
		ol_with_kerberos=no
	fi
fi

if test $ol_enable_spasswd = yes ; then
	if test $ol_with_cyrus_sasl = no ; then
		AC_MSG_ERROR([options require --with-cyrus-sasl])
	fi
	ol_with_cyrus_sasl=yes
fi

AC_MSG_RESULT(done)

dnl ----------------------------------------------------------------
dnl Initialize vars
LDAP_LIBS=
LDBM_LIBS=
LTHREAD_LIBS=
LUTIL_LIBS=

SLAPD_LIBS=
SLURPD_LIBS=

BUILD_SLAPD=no
BUILD_SLURPD=no

BUILD_THREAD=no

BUILD_SLAPI=no
SLAPD_SLAPI_DEPEND=

BUILD_BDB=no
BUILD_DNSSRV=no
BUILD_HDB=no
BUILD_LDAP=no
BUILD_LDBM=no
BUILD_META=no
BUILD_MONITOR=no
BUILD_NULL=no
BUILD_PASSWD=no
BUILD_PERL=no
BUILD_RELAY=no
BUILD_SHELL=no
BUILD_SQL=no

BUILD_CHAIN=no
BUILD_DENYOP=no
BUILD_DYNGROUP=no
BUILD_DYNLIST=no
BUILD_GLUE=no
BUILD_LASTMOD=no
BUILD_PPOLICY=no
BUILD_PROXYCACHE=no
BUILD_REFINT=no
BUILD_RWM=no
BUILD_SYNCPROV=no
BUILD_TRANSLUCENT=no
BUILD_UNIQUE=no

SLAPD_STATIC_OVERLAYS=
SLAPD_DYNAMIC_OVERLAYS=

SLAPD_MODULES_LDFLAGS=
SLAPD_MODULES_CPPFLAGS=

SLAPD_STATIC_BACKENDS=back-ldif
SLAPD_DYNAMIC_BACKENDS=

SLAPD_PERL_LDFLAGS=
MOD_PERL_LDFLAGS=
PERL_CPPFLAGS=

SLAPD_SQL_LDFLAGS=
SLAPD_SQL_LIBS=
SLAPD_SQL_INCLUDES=

KRB4_LIBS=
KRB5_LIBS=
SASL_LIBS=
TLS_LIBS=
MODULES_LIBS=
SLAPI_LIBS=
LIBSLAPI=
LIBSLAPITOOLS=
AUTH_LIBS=

SLAPD_SLP_LIBS=
SLAPD_GMP_LIBS=

dnl ================================================================
dnl Checks for programs

AC_DEFINE(HAVE_MKVERSION, 1, [define this if you have mkversion])

dnl ----------------------------------------------------------------
dnl
dnl Determine which C translator to use
dnl

dnl AIX Thread requires we use cc_r or xlc_r.
dnl But only do this IF AIX and CC is not set
dnl and threads are auto|yes|posix.
dnl
dnl If we find cc_r|xlc_r, force pthreads and assume
dnl		pthread_create is in $LIBS (ie: don't bring in
dnl		any additional thread libraries)
dnl If we do not find cc_r|xlc_r, disable threads

ol_aix_threads=no
case "$target" in
*-*-aix*) dnl all AIX is not a good idea.
	if test -z "$CC" ; then
		case "$ol_with_threads" in
		auto | yes |  posix) ol_aix_threads=yes ;;
		esac
	fi
;;
esac

if test $ol_aix_threads = yes ; then
	if test -z "${CC}" ; then
		AC_CHECK_PROGS(CC,cc_r xlc_r cc)

		if test "$CC" = cc ; then
			dnl no CC! don't allow --with-threads
			if test $ol_with_threads != auto ; then
				AC_MSG_ERROR([--with-threads requires cc_r (or other suitable compiler) on AIX])
			else
				AC_MSG_WARN([disabling threads, no cc_r on AIX])
			fi
			ol_with_threads=no
  		fi
	fi

	if test "${CC}" = "cc_r" -o "${CC}" = "xlc_r" ; then
		ol_with_threads=posix
		ol_cv_pthread_create=yes
	fi
fi

if test -z "${CC}"; then
	AC_CHECK_PROGS(CC,cc gcc,missing)

	if test "${CC}" = "missing" ; then
		AC_MSG_ERROR([Unable to locate cc(1) or suitable replacement.  Check PATH or set CC.])
	fi
fi

if test -z "${AR}"; then
	AC_CHECK_PROGS(AR,ar gar,missing)

	if test "${AR}" = "missing" ; then
		AC_MSG_ERROR([Unable to locate ar(1) or suitable replacement.  Check PATH or set AR.])
	fi
fi

AC_LIBTOOL_WIN32_DLL
AC_LIBTOOL_DLOPEN
AC_PROG_LIBTOOL

dnl ----------------------------------------------------------------
dnl Perl
ol_link_perl=no
if test $ol_enable_perl != no ; then
	AC_PATH_PROG(PERLBIN, perl, /usr/bin/perl)

	if test "no$PERLBIN" = "no" ; then
		if test $ol_enable_perl = yes ; then
			AC_MSG_ERROR([could not locate perl])
		fi

	else
		PERL_CPPFLAGS="`$PERLBIN -MExtUtils::Embed -e ccopts`"
		PERL_LDFLAGS="`$PERLBIN -MExtUtils::Embed -e ldopts|sed -e 's/ -lc / /' -e 's/ -lc$//'`"

		if test x"$ol_enable_perl" = "xyes" ; then
			SLAPD_PERL_LDFLAGS="$PERL_LDFLAGS"
		else
			MOD_PERL_LDFLAGS="$PERL_LDFLAGS"
		fi
		dnl should check perl version
		ol_link_perl=yes
	fi
fi

AC_PROG_CPP

dnl ----------------------------------------------------------------
dnl Checks for UNIX Variants
dnl AC_AIX
dnl AC_ISC_POSIX
dnl AC_MINIX

dnl ----------------------------------------------------------------
dnl Checks for system services
AC_CYGWIN
AC_MINGW32
AC_EXEEXT
AC_OBJEXT

AC_DEFINE_UNQUOTED(EXEEXT, "${EXEEXT}", [defined to be the EXE extension])

dnl ----------------------------------------------------------------
dnl BeOS requires -lbe -lroot -lnet
AC_CHECK_LIB(be, be_app, [LIBS="$LIBS -lbe -lroot -lnet"], :, [-lroot -lnet])

dnl ----------------------------------------------------------------
dnl OpenLDAP requires STDC features
AM_PROG_CC_STDC
if test "X${am_cv_prog_cc_stdc}" = "Xno" ; then
	AC_MSG_ERROR([OpenLDAP requires compiler to support STDC constructs.])
fi

dnl ----------------------------------------------------------------
dnl Check cc depend flags
OL_MKDEPEND
if test "${ol_cv_mkdep}" = no ; then
	# this will soon become an error
	AC_MSG_WARN([do not know how to generate dependencies])
fi

dnl ----------------------------------------------------------------
dnl Check for AIX security library
AC_CHECK_LIB(s, afopen, [
	AUTH_LIBS=-ls
	AC_DEFINE(HAVE_AIX_SECURITY,1,[define if you have AIX security lib])
])

dnl ----------------------------------------------------------------
dnl Check for IBM OS/390
case "$target" in
*-ibm-openedition)
	ac_cv_func_getopt=no
	AC_DEFINE(BOTH_STRINGS_H,1,[define to use both <string.h> and <strings.h>])
	;;
esac

dnl ----------------------------------------------------------------
dnl Check for module support
ol_link_modules=no
WITH_MODULES_ENABLED=no
if test $ol_enable_modules != no ; then
	AC_CHECK_HEADERS(ltdl.h)

	if test $ac_cv_header_ltdl_h = no ; then
		AC_MSG_ERROR([could not locate libtool ltdl.h])
	fi

	AC_CHECK_LIB(ltdl, lt_dlinit, [
		MODULES_LIBS=-lltdl
		AC_DEFINE(HAVE_LIBLTDL,1,[define if you have libtool -ltdl])
	])

	if test "$ac_cv_lib_ltdl_lt_dlinit" = no ; then
		AC_MSG_ERROR([could not locate libtool -lltdl])
	fi
	ol_link_modules=yes
	WITH_MODULES_ENABLED=yes

else
	for i in $Backends; do
		eval "ol_tmp=\$ol_enable_$i"
		if test $ol_tmp = mod ; then
			AC_MSG_WARN([building static $i backend])
			eval "ol_enable_$i=yes"
		fi
	done
	for i in $Overlays; do
		eval "ol_tmp=\$ol_enable_$i"
		if test $ol_tmp = mod ; then
			AC_MSG_WARN([building static $i overlay])
			eval "ol_enable_$i=yes"
		fi
	done
fi

dnl ----------------------------------------------------------------
dnl Checks for header files.
OL_HEADER_STDC

if test $ol_cv_header_stdc != yes; then
	AC_MSG_WARN([could not locate Standard C compliant headers])
fi

AC_HEADER_DIRENT
AC_HEADER_SYS_WAIT
AM_HEADER_TIOCGWINSZ_NEEDS_SYS_IOCTL
if test $am_cv_sys_posix_termios = yes ; then
	AC_DEFINE(HAVE_POSIX_TERMIOS,1,
		[define if you have POSIX termios])
fi

AC_CHECK_HEADERS(	\
	arpa/inet.h		\
	arpa/nameser.h	\
	assert.h		\
	bits/types.h	\
	conio.h			\
	crypt.h			\
	direct.h		\
	errno.h			\
	fcntl.h			\
	filio.h			\
	getopt.h		\
	grp.h			\
	io.h			\
	libutil.h		\
	limits.h		\
	locale.h		\
	netinet/tcp.h	\
	malloc.h		\
	memory.h		\
	psap.h			\
	pwd.h			\
	process.h		\
	resolv.h		\
	sgtty.h			\
	shadow.h		\
	stddef.h		\
	string.h		\
	strings.h		\
	sysexits.h		\
	sys/file.h		\
	sys/filio.h		\
	sys/errno.h		\
	sys/ioctl.h		\
	sys/param.h		\
	sys/resource.h	\
	sys/select.h	\
	sys/socket.h	\
	sys/stat.h		\
	sys/syslog.h	\
	sys/time.h		\
	sys/types.h		\
	sys/ucred.h		\
	sys/uio.h		\
	syslog.h		\
	termios.h		\
	unistd.h		\
	winsock.h		\
	winsock2.h		\
)

dnl ----------------------------------------------------------------
dnl Checks for libraries

AC_CHECK_FUNCS( sigaction sigset )

dnl HP-UX requires -lV3
dnl this is not needed on newer versions of HP-UX
if test $ac_cv_func_sigaction = no && test $ac_cv_func_sigaction = no ; then
	AC_CHECK_LIB(V3, sigset)
fi

dnl The following is INTENTIONALLY scripted out because shell does not
dnl support variable names with the '@' character, which is what
dnl autoconf would try to generate if one merely used AC_SEARCH_LIBS
dnl
dnl Skip Winsock tests on Cygwin
if test "$ac_cv_cygwin" != yes && "$ac_cv_header_winsock_h" = yes; then
AC_CACHE_CHECK([for winsock], [ol_cv_winsock],
save_LIBS="$LIBS"
for curlib in ws2_32 wsock32; do
	LIBS="$LIBS -l$curlib"
	AC_TRY_LINK([#include <winsock.h>
			],
			[
			socket(0,0,0);
			select(0,NULL,NULL,NULL,NULL);
			closesocket(0);
			gethostname(NULL,0);
			],
			ol_cv_winsock=yes, ol_cv_winsock=no)

	if test $ol_cv_winsock = yes; then
		AC_DEFINE(HAVE_WINSOCK, 1, [define if you have winsock])
		ac_cv_func_socket=yes
		ac_cv_func_select=yes
		ac_cv_func_closesocket=yes
		ac_cv_func_gethostname=yes
		if test $curlib = ws2_32; then
			ol_cv_winsock=winsock2
			AC_DEFINE(HAVE_WINSOCK2, 1,
				  [define if you have winsock2])
		fi
		break
	fi
	LIBS="$save_LIBS"
done)
fi

dnl Find socket()
dnl Likely combinations:
dnl		-lsocket [ -lnsl_s | -lnsl ]
dnl		-linet

AC_CHECK_FUNC(socket, :, [	
dnl hopefully we won't include too many libraries
	AC_CHECK_LIB(socket, main)
	AC_CHECK_LIB(net, main)
	AC_CHECK_LIB(nsl_s, main)
	AC_CHECK_LIB(nsl, main)
	AC_CHECK_LIB(inet, socket)
	AC_CHECK_LIB(gen, main)
])

dnl require select
AC_CHECK_FUNC(select, :, AC_MSG_ERROR([select() required.]))

if test "${ac_cv_header_winsock_h}" != yes; then
	dnl Select arg types
	dnl (if this detection becomes permenent, it and the select() detection
	dnl should be done before the yielding select test) 
	AC_FUNC_SELECT_ARGTYPES
fi

dnl check to see if system call automatically restart
dnl AC_SYS_RESTARTABLE_SYSCALLS

dnl ----------------------------------------------------------------
AC_CHECK_FUNCS( poll )
AC_CHECK_HEADERS( poll.h )

dnl ----------------------------------------------------------------
AC_CHECK_HEADERS( sys/epoll.h )
if test "${ac_cv_header_sys_epoll_h}" = yes; then
AC_MSG_CHECKING(for epoll system call)
AC_TRY_RUN(
int main(int argc, char *argv[])
{
	int epfd = epoll_create(256);
	exit (epfd == -1 ? 1 : 0);
}, [AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_EPOLL,1, [define if your system supports epoll])],
AC_MSG_RESULT(no),AC_MSG_RESULT(no))
fi

dnl ----------------------------------------------------------------
# strerror checks
OL_STRERROR

dnl ----------------------------------------------------------------
dnl require POSIX regex
AC_CHECK_HEADERS( regex.h )
if test "$ac_cv_header_regex_h" != yes ; then
	AC_MSG_ERROR([POSIX regex.h required.])
fi
AC_SEARCH_LIBS(regfree, [regex gnuregex],
	:, AC_MSG_ERROR([POSIX regex required.]))

OL_POSIX_REGEX
if test "$ol_cv_c_posix_regex" = no ; then
	AC_MSG_ERROR([broken POSIX regex!])
fi

dnl ----------------------------------------------------------------
dnl UUID Support

have_uuid=no
AC_CHECK_HEADERS(sys/uuid.h)
if test $ac_cv_header_sys_uuid_h = yes ; then
	save_LIBS="$LIBS"
	AC_SEARCH_LIBS(uuid_to_str, uuid, [have_uuid=yes], :)
	LIBS="$save_LIBS"

	if test have_uuid = yes ; then
		AC_DEFINE(HAVE_UUID_TO_STR,1,
			[define if you have uuid_to_str()])

		test "$ac_cv_search_uuid_to_str" = "none required" || \
			SLAPD_LIBS="$SLAPD_LIBS $ac_cv_search_uuid_to_str"
	fi
fi

dnl For windows, check for the need of RPCRT for UUID function support
if test $have_uuid = no ; then
	AC_MSG_CHECKING(to see if -lrpcrt4 is needed for win32 UUID support)
	save_LIBS="$LIBS"
	LIBS="$LIBS -lrpcrt4"
	AC_TRY_LINK([
		int __stdcall UuidCreate(void *);
		int __stdcall UuidToStringA(void *,void **);
		],
		[
		UuidCreate(0);
		UuidToStringA(0,0);
		],
		need_rpcrt=yes, need_rpcrt=no)
	if test $need_rpcrt = yes; then
		SLAPD_LIBS="$SLAPD_LIBS -lrpcrt4"
	fi
	LIBS="$save_LIBS"
	AC_MSG_RESULT($need_rpcrt)
fi

dnl ----------------------------------------------------------------
dnl Check for resolver routines
OL_RESOLVER_LINK

ol_link_dnssrv=no
if test "$ol_cv_lib_resolver" != no ; then
	AC_DEFINE(HAVE_RES_QUERY,1,
		[define if you have res_query()])

	if test "$ol_enable_dnssrv" != no ; then
		ol_link_dnssrv=yes
	fi

	if test "$ol_cv_lib_resolver" != yes ; then
		LIBS="$ol_cv_lib_resolver $LIBS"
	fi
fi

if test "$ol_enable_dnssrv" = yes -o "$ol_enable_dnssrv" = mod ; then
	if test "$ol_link_dnssrv" = no ; then
		AC_MSG_ERROR([DNSSRV requires res_query()])
	fi
else
	ol_enable_dnssrv=no
fi