configure.in

dnl $OpenLDAP$
dnl This work is part of OpenLDAP Software <http://www.openldap.org/>.
dnl
dnl Copyright 1998-2020 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 Disable config.cache!
define([AC_CACHE_LOAD], )dnl
define([AC_CACHE_SAVE], )dnl
dnl ----------------------------------------------------------------
dnl Disable libtool 1.5 support for languages we don't use
define([AC_LIBTOOL_LANG_CXX_CONFIG], [:])dnl
define([AC_LIBTOOL_LANG_F77_CONFIG], [:])dnl
define([AC_LIBTOOL_LANG_GCJ_CONFIG], [:])dnl
dnl ================================================================
dnl Configure.in for OpenLDAP
AC_COPYRIGHT([[Copyright 1998-2020 The OpenLDAP Foundation. All rights reserved.
Restrictions apply, see COPYRIGHT and LICENSE files.]])
AC_REVISION([$Id$])
AC_INIT([OpenLDAP],,[https://bugs.openldap.org],,[https://www.openldap.org])
AC_CONFIG_SRCDIR(build/version.sh)dnl
dnl ----------------------------------------------------------------
dnl OpenLDAP Autoconf Macros
builtin(include, build/openldap.m4)dnl
dnl ================================================================

AC_CONFIG_AUX_DIR(build)dnl
AC_CONFIG_MACRO_DIRS([build])

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" && test ! -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="" TN=""
if test -t 1; then
	TB="`$SHTOOL echo -e '%B' 2>/dev/null`"
	TN="`$SHTOOL echo -e '%b' 2>/dev/null`"
fi

OPENLDAP_REPO=""
if test -d $ac_aux_dir/../.git; then
	OPENLDAP_REPO="(from Git clone) "
elif test -d $ac_aux_dir/CVS; then
	OPENLDAP_REPO="(from CVS checkout) "
fi

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

dnl Determine host platform
dnl		we try not to use this for much
AC_CANONICAL_TARGET([])

AC_SUBST(PACKAGE,$OL_PACKAGE)dnl
AC_SUBST(VERSION,$OL_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

AC_PREREQ(2.69)dnl Required Autoconf version

AH_TOP([
/* begin of portable.h.pre */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
 *
 * Copyright 1998-2020 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>.
 */

#ifndef _LDAP_PORTABLE_H
#define _LDAP_PORTABLE_H

/* define this if needed to get reentrant functions */
#ifndef REENTRANT
#undef REENTRANT
#endif
#ifndef _REENTRANT
#undef _REENTRANT
#endif

/* define this if needed to get threadsafe functions */
#ifndef THREADSAFE
#undef THREADSAFE
#endif
#ifndef _THREADSAFE
#undef _THREADSAFE
#endif
#ifndef THREAD_SAFE
#undef THREAD_SAFE
#endif
#ifndef _THREAD_SAFE
#undef _THREAD_SAFE
#endif

#ifndef _SGI_MP_SOURCE
#undef _SGI_MP_SOURCE
#endif

/* end of portable.h.pre */
])
AH_BOTTOM([
/* begin of portable.h.post */

#ifdef _WIN32
	/* don't suck in all of the win32 api */
#	define WIN32_LEAN_AND_MEAN 1
#endif

#ifndef LDAP_NEEDS_PROTOTYPES
/* force LDAP_P to always include prototypes */
#define LDAP_NEEDS_PROTOTYPES 1
#endif

#ifndef LDAP_REL_ENG
#if (LDAP_VENDOR_VERSION == 000000) && !defined(LDAP_DEVEL)
#define LDAP_DEVEL
#endif
#if defined(LDAP_DEVEL) && !defined(LDAP_TEST)
#define LDAP_TEST
#endif
#endif

#ifdef HAVE_STDDEF_H
#	include <stddef.h>
#endif

#ifdef HAVE_EBCDIC 
/* ASCII/EBCDIC converting replacements for stdio funcs
 * vsnprintf and snprintf are used too, but they are already
 * checked by the configure script
 */
#define fputs ber_pvt_fputs
#define fgets ber_pvt_fgets
#define printf ber_pvt_printf
#define fprintf ber_pvt_fprintf
#define vfprintf ber_pvt_vfprintf
#define vsprintf ber_pvt_vsprintf
#endif

#include "ac/fdset.h"

#include "ldap_cdefs.h"
#include "ldap_features.h"

#include "ac/assert.h"
#include "ac/localize.h"

#endif /* _LDAP_PORTABLE_H */
/* end of portable.h.post */
])

AC_CONFIG_HEADERS([include/portable.h:include/portable.hin])
AC_CONFIG_HEADERS([include/ldap_features.h:include/ldap_features.hin])
AC_CONFIG_HEADERS([include/lber_types.h:include/lber_types.hin])

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
dnl set default to traditional to enable the original debug style
OL_ARG_ENABLE(debug, [AS_HELP_STRING([--enable-debug], [enable debugging])], yes, [no yes traditional])dnl
OL_ARG_ENABLE(dynamic, [AS_HELP_STRING([--enable-dynamic], [enable linking built binaries with dynamic libs])], auto)dnl
OL_ARG_ENABLE(syslog, [AS_HELP_STRING([--enable-syslog], [enable syslog support])], auto)dnl
dnl OL_ARG_ENABLE(referrals,[AS_HELP_STRING([--enable-referrals], [enable LDAPv2+ Referrals (experimental)])], no)dnl
ol_enable_referrals=${ol_enable_referrals-no}
OL_ARG_ENABLE(ipv6, [AS_HELP_STRING([--enable-ipv6], [enable IPv6 support])], auto)dnl
OL_ARG_ENABLE(local, [AS_HELP_STRING([--enable-local], [enable AF_LOCAL (AF_UNIX) socket support])], auto)dnl

dnl ----------------------------------------------------------------
dnl General "with" options
OL_ARG_WITH(cyrus_sasl, [AS_HELP_STRING([--with-cyrus-sasl], [with Cyrus SASL support])],
	auto, [auto yes no] )
OL_ARG_WITH(fetch, [AS_HELP_STRING([--with-fetch], [with fetch(3) URL support])],
	auto, [auto yes no] )
OL_ARG_WITH(threads,
	[AS_HELP_STRING([--with-threads], [with threads library auto|nt|posix|pth|lwp|manual])],
	auto, [auto nt posix pth lwp yes no manual] )
OL_ARG_WITH(tls,
	[AS_HELP_STRING([--with-tls], [with TLS/SSL support auto|openssl|gnutls])],
	auto, [auto openssl gnutls yes no] )
OL_ARG_WITH(yielding_select,
	[AS_HELP_STRING([--with-yielding-select], [with implicitly yielding select])],
	auto, [auto yes no manual] )
OL_ARG_WITH(mp,
	[AS_HELP_STRING([--with-mp], [with multiple precision statistics auto|longlong|long|bignum|gmp])],
	auto, [auto longlong long bignum gmp yes no])
OL_ARG_WITH(odbc,
	[AS_HELP_STRING([--with-odbc], [with specific ODBC support iodbc|unixodbc|odbc32|auto])],
	auto, [auto iodbc unixodbc odbc32] )

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

dnl ----------------------------------------------------------------
dnl SLAPD OPTIONS
SlapdOptions="dynacl \
	aci \
	cleartext \
	crypt \
	spasswd \
	modules \
	rlookups \
	slapi \
	slp \
	wrappers"

AC_ARG_ENABLE(xxslapdoptions,[
SLAPD (Standalone LDAP Daemon) Options:])

OL_ARG_ENABLE(slapd, [AS_HELP_STRING([--enable-slapd], [enable building slapd])], yes)dnl
OL_ARG_ENABLE(dynacl, [AS_HELP_STRING([--enable-dynacl], [enable run-time loadable ACL support (experimental)])], no)dnl
OL_ARG_ENABLE(aci, [AS_HELP_STRING([--enable-aci], [enable per-object ACIs (experimental)])], no, [no yes mod])dnl
OL_ARG_ENABLE(cleartext, [AS_HELP_STRING([--enable-cleartext], [enable cleartext passwords])], yes)dnl
OL_ARG_ENABLE(crypt, [AS_HELP_STRING([--enable-crypt], [enable crypt(3) passwords])], no)dnl
OL_ARG_ENABLE(spasswd, [AS_HELP_STRING([--enable-spasswd], [enable (Cyrus) SASL password verification])], no)dnl
OL_ARG_ENABLE(modules, [AS_HELP_STRING([--enable-modules], [enable dynamic module support])], no)dnl
OL_ARG_ENABLE(rlookups, [AS_HELP_STRING([--enable-rlookups], [enable reverse lookups of client hostnames])], no)dnl
OL_ARG_ENABLE(slapi, [AS_HELP_STRING([--enable-slapi], [enable SLAPI support (experimental)])], no)dnl
OL_ARG_ENABLE(slp, [AS_HELP_STRING([--enable-slp], [enable SLPv2 support])], no)dnl
OL_ARG_ENABLE(wrappers, [AS_HELP_STRING([--enable-wrappers], [enable tcp wrapper support])], no)dnl

dnl ----------------------------------------------------------------
dnl SLAPD Backend Options
Backends="dnssrv \
	ldap \
	mdb \
	meta \
	asyncmeta \
	monitor \
	ndb \
	null \
	passwd \
	perl \
	relay \
	sock \
	sql \
	wt"

AC_ARG_ENABLE(xxslapbackends,[
SLAPD Backend Options:])

OL_ARG_ENABLE(backends, [AS_HELP_STRING([--enable-backends], [enable all available backends])],
	--, [no yes mod])dnl
OL_ARG_ENABLE(dnssrv, [AS_HELP_STRING([--enable-dnssrv], [enable dnssrv backend])],
	no, [no yes mod], ol_enable_backends)dnl
OL_ARG_ENABLE(ldap, [AS_HELP_STRING([--enable-ldap], [enable ldap backend])],
	no, [no yes mod], ol_enable_backends)dnl
OL_ARG_ENABLE(mdb, [AS_HELP_STRING([--enable-mdb], [enable mdb database backend])],
	yes, [no yes mod], ol_enable_backends)dnl
OL_ARG_ENABLE(meta, [AS_HELP_STRING([--enable-meta], [enable metadirectory backend])],
	no, [no yes mod], ol_enable_backends)dnl
OL_ARG_ENABLE(asyncmeta, [AS_HELP_STRING([--enable-asyncmeta], [enable asynchronous metadirectory backend])],
	no, [no yes mod], ol_enable_backends)dnl
OL_ARG_ENABLE(monitor, [AS_HELP_STRING([--enable-monitor], [enable monitor backend])],
	yes, [no yes mod], ol_enable_backends)dnl
OL_ARG_ENABLE(ndb, [AS_HELP_STRING([--enable-ndb], [enable MySQL NDB Cluster backend])],
	no, [no yes mod])dnl
OL_ARG_ENABLE(null, [AS_HELP_STRING([--enable-null], [enable null backend])],
	no, [no yes mod], ol_enable_backends)dnl
OL_ARG_ENABLE(passwd, [AS_HELP_STRING([--enable-passwd], [enable passwd backend])],
	no, [no yes mod], ol_enable_backends)dnl
OL_ARG_ENABLE(perl, [AS_HELP_STRING([--enable-perl], [enable perl backend])],
	no, [no yes mod])dnl
OL_ARG_ENABLE(relay, [AS_HELP_STRING([--enable-relay], [enable relay backend])],
	yes, [no yes mod], ol_enable_backends)dnl
OL_ARG_ENABLE(sock, [AS_HELP_STRING([--enable-sock], [enable sock backend])],
	no, [no yes mod], ol_enable_backends)dnl
OL_ARG_ENABLE(sql, [AS_HELP_STRING([--enable-sql], [enable sql backend])],
	no, [no yes mod])dnl
OL_ARG_ENABLE(wt, [AS_HELP_STRING([--enable-wt], [enable WiredTiger backend])],
	no, [no yes mod], ol_enable_backends)dnl

dnl ----------------------------------------------------------------
dnl SLAPD Overlay Options
Overlays="accesslog \
	auditlog \
	autoca \
	collect \
	constraint \
	dds \
	deref \
	dyngroup \
	dynlist \
	memberof \
	ppolicy \
	proxycache \
	refint \
	retcode \
	rwm \
	seqmod \
	sssvlv \
	syncprov \
	translucent \
	unique \
	valsort"

AC_ARG_ENABLE(xxslapoverlays,[
SLAPD Overlay Options:])

OL_ARG_ENABLE(overlays, [AS_HELP_STRING([--enable-overlays], [enable all available overlays])],
	--, [no yes mod])dnl
OL_ARG_ENABLE(accesslog, [AS_HELP_STRING([--enable-accesslog], [In-Directory Access Logging overlay])],
	no, [no yes mod], ol_enable_overlays)
OL_ARG_ENABLE(auditlog, [AS_HELP_STRING([--enable-auditlog], [Audit Logging overlay])],
	no, [no yes mod], ol_enable_overlays)
OL_ARG_ENABLE(autoca, [AS_HELP_STRING([--enable-autoca], [Automatic Certificate Authority overlay])],
	no, [no yes mod], ol_enable_overlays)
OL_ARG_ENABLE(collect, [AS_HELP_STRING([--enable-collect], [Collect overlay])],
	no, [no yes mod], ol_enable_overlays)
OL_ARG_ENABLE(constraint, [AS_HELP_STRING([--enable-constraint], [Attribute Constraint overlay])],
	no, [no yes mod], ol_enable_overlays)
OL_ARG_ENABLE(dds, [AS_HELP_STRING([--enable-dds], [Dynamic Directory Services overlay])],
	no, [no yes mod], ol_enable_overlays)
OL_ARG_ENABLE(deref, [AS_HELP_STRING([--enable-deref], [Dereference overlay])],
	no, [no yes mod], ol_enable_overlays)
OL_ARG_ENABLE(dyngroup, [AS_HELP_STRING([--enable-dyngroup], [Dynamic Group overlay])],
	no, [no yes mod], ol_enable_overlays)
OL_ARG_ENABLE(dynlist, [AS_HELP_STRING([--enable-dynlist], [Dynamic List overlay])],
	no, [no yes mod], ol_enable_overlays)
OL_ARG_ENABLE(memberof, [AS_HELP_STRING([--enable-memberof], [Reverse Group Membership overlay])],
	no, [no yes mod], ol_enable_overlays)
OL_ARG_ENABLE(ppolicy, [AS_HELP_STRING([--enable-ppolicy], [Password Policy overlay])],
	no, [no yes mod], ol_enable_overlays)
OL_ARG_ENABLE(proxycache, [AS_HELP_STRING([--enable-proxycache], [Proxy Cache overlay])],
	no, [no yes mod], ol_enable_overlays)
OL_ARG_ENABLE(refint, [AS_HELP_STRING([--enable-refint], [Referential Integrity overlay])],
	no, [no yes mod], ol_enable_overlays)
OL_ARG_ENABLE(retcode, [AS_HELP_STRING([--enable-retcode], [Return Code testing overlay])],
	no, [no yes mod], ol_enable_overlays)
OL_ARG_ENABLE(rwm, [AS_HELP_STRING([--enable-rwm], [Rewrite/Remap overlay])],
	no, [no yes mod], ol_enable_overlays)
OL_ARG_ENABLE(seqmod, [AS_HELP_STRING([--enable-seqmod], [Sequential Modify overlay])],
	no, [no yes mod], ol_enable_overlays)
OL_ARG_ENABLE(sssvlv, [AS_HELP_STRING([--enable-sssvlv], [ServerSideSort/VLV overlay])],
	no, [no yes mod], ol_enable_overlays)
OL_ARG_ENABLE(syncprov, [AS_HELP_STRING([--enable-syncprov], [Syncrepl Provider overlay])],
	yes, [no yes mod], ol_enable_overlays)
OL_ARG_ENABLE(translucent, [AS_HELP_STRING([--enable-translucent], [Translucent Proxy overlay])],
	no, [no yes mod], ol_enable_overlays)
OL_ARG_ENABLE(unique, [AS_HELP_STRING([--enable-unique], [Attribute Uniqueness overlay])],
	no, [no yes mod], ol_enable_overlays)
OL_ARG_ENABLE(valsort, [AS_HELP_STRING([--enable-valsort], [Value Sorting overlay])],
	no, [no yes mod], ol_enable_overlays)

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

dnl ----------------------------------------------------------------
dnl Validate options
dnl ----------------------------------------------------------------

if test $ol_enable_slapd = no ; then
	dnl SLAPD was specifically disabled
	dnl Disable all of its options

	for i in $SlapdOptions; do
		eval "ol_tmp=\$ol_enable_$i"
		if test $ol_tmp = yes ; then
			AC_MSG_WARN([slapd disabled, ignoring --enable-$i argument])
			eval "ol_enable_$i=no"
		fi
	done

	for i in $Backends $Overlays; do
		eval "ol_tmp=\$ol_enable_$i"
		if test $ol_tmp != no ; then
			AC_MSG_WARN([slapd disabled, ignoring --enable-$i argument])
			eval "ol_enable_$i=no"
		fi
	done
else
	dnl If slapd enabled and loadable module support disabled
	dnl then require at least one built-in backend

	if test $ol_enable_modules = no; then
		ol_any_backend=no
		for i in $Backends; do
			eval "ol_tmp=\$ol_enable_$i"
			if test $ol_tmp = yes; then
				ol_any_backend=yes
			fi
		done

		if test $ol_any_backend = no; then
			AC_MSG_ERROR([slapd requires a backend])
		fi
	fi
fi

if test $ol_enable_aci = yes ; then
	if test $ol_enable_dynacl = no ; then
		AC_MSG_ERROR([--enable-aci requires --enable-dynacl])
	fi
elif test $ol_enable_aci = mod ; then
	AC_MSG_ERROR([ACI build as dynamic module not supported (yet)])
fi

if test $ol_enable_modules = yes ; then
	if test $ol_enable_dynamic = no ; then
		AC_MSG_ERROR([--enable-modules requires --enable-dynamic])
	fi
	ol_enable_dynamic=yes
fi

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

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

if test $ol_enable_asyncmeta/$ol_enable_ldap = yes/no ; then
	AC_MSG_ERROR([--enable-asyncmeta requires --enable-ldap])
fi

AC_MSG_RESULT(done)

dnl ----------------------------------------------------------------
dnl Initialize vars
LDAP_LIBS=
SLAPD_NDB_LIBS=
SLAPD_NDB_INCS=
LTHREAD_LIBS=
LUTIL_LIBS=

CLIENT_LIBS=

SLAPD_LIBS=

BUILD_SLAPD=no

BUILD_THREAD=no

BUILD_SLAPI=no
SLAPD_SLAPI_DEPEND=

BUILD_DNSSRV=no
BUILD_LDAP=no
BUILD_MDB=no
BUILD_META=no
BUILD_ASYNCMETA=no
BUILD_MONITOR=no
BUILD_NDB=no
BUILD_NULL=no
BUILD_PASSWD=no
BUILD_PERL=no
BUILD_RELAY=no
BUILD_SHELL=no
BUILD_SOCK=no
BUILD_SQL=no
BUILD_WT=no

BUILD_ACCESSLOG=no
BUILD_AUDITLOG=no
BUILD_AUTOCA=no
BUILD_CONSTRAINT=no
BUILD_DDS=no
BUILD_DENYOP=no
BUILD_DEREF=no
BUILD_DYNGROUP=no
BUILD_DYNLIST=no
BUILD_LASTMOD=no
BUILD_MEMBEROF=no
BUILD_PPOLICY=no
BUILD_PROXYCACHE=no
BUILD_REFINT=no
BUILD_RETCODE=no
BUILD_RWM=no
BUILD_SEQMOD=no
BUILD_SSSVLV=no
BUILD_SYNCPROV=no
BUILD_TRANSLUCENT=no
BUILD_UNIQUE=no
BUILD_VALSORT=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=
WITH_TLS_TYPE=
MODULES_LIBS=
SLAPI_LIBS=
LIBSLAPI=
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

	case ${CC} in cc_r | xlc_r)
		ol_with_threads=posix
		ol_cv_pthread_create=yes
		;;
	esac
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_MAKE_SET
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
OL_MSVC

dnl ----------------------------------------------------------------
dnl Checks for Windows NT
case $host_os in
  *mingw32* ) ac_cv_mingw32=yes ;;
  *cygwin* ) ac_cv_cygwin=yes ;;
  *interix* ) ac_cv_interix=yes ;;
esac

AC_CHECK_TOOL(RC, windres, )

dnl ----------------------------------------------------------------
dnl Checks for file extensions
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
AC_PROG_CC
if test "X${ac_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
AC_HEADER_TIOCGWINSZ

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		\
	malloc.h		\
	memory.h		\
	psap.h			\
	pwd.h			\
	process.h		\
	sgtty.h			\
	shadow.h		\
	stddef.h		\
	string.h		\
	strings.h		\
	sysexits.h		\
	sys/file.h		\
	sys/filio.h		\
	sys/fstyp.h		\
	sys/errno.h		\
	sys/ioctl.h		\
	sys/param.h		\
	sys/privgrp.h	\
	sys/resource.h	\
	sys/select.h	\
	sys/socket.h	\
	sys/stat.h		\
	sys/syslog.h	\
	sys/time.h		\
	sys/types.h		\
	sys/uio.h		\
	sys/vmount.h	\
	syslog.h		\
	termios.h		\
	unistd.h		\
	utime.h			\
)

dnl Only check Winsock on MinGW
if test "$ac_cv_mingw32" = yes \
	-o "$ac_cv_interix" = yes \
	-o "$ol_cv_msvc" = yes
then
	AC_CHECK_HEADERS( winsock.h winsock2.h )
fi

AC_CHECK_HEADERS( resolv.h, [], [],
[$ac_includes_default
#include <netinet/in.h>
])

AC_CHECK_HEADERS( netinet/tcp.h, [], [],
[$ac_includes_default
#include <netinet/in.h>
])

AC_CHECK_HEADERS( sys/ucred.h, [], [],
[$ac_includes_default
#ifdef HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif
])

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

AC_CHECK_FUNCS( sigaction sigset )
AC_CHECK_FUNCS( fmemopen )

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

if test $ol_cv_msvc = yes ; then
   ol_cv_winsock=yes
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
if test "$ac_cv_header_winsock_h" = yes; then
	AC_CACHE_CHECK([for winsock], [ol_cv_winsock],[
	save_LIBS="$LIBS"
	for curlib in none ws2_32 wsock32; do
		if test $curlib != none ; then
	    	LIBS="$save_LIBS -l$curlib"
		fi
		AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <winsock.h>
			]], [[
			socket(0,0,0);
			select(0,NULL,NULL,NULL,NULL);
			closesocket(0);
			gethostname(NULL,0);
			]])],[ol_cv_winsock=$curlib],[ol_cv_winsock=no])

		test "$ol_cv_winsock" != no && break
	done
	LIBS="$save_LIBS"
	])

	if test $ol_cv_winsock != no ; 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 $ol_cv_winsock != none -a $ol_cv_winsock != yes ; then
        	LIBS="$LIBS -l$ol_cv_winsock"
		fi

    	if test $ol_cv_winsock = ws2_32 -o $ol_cv_winsock = yes ; then
			AC_DEFINE(HAVE_WINSOCK2, 1, [define if you have winsock2])
    	fi
	fi
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, socket)
	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 permanent, 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 )
if test $ac_cv_func_poll = yes; then
AC_CHECK_HEADERS( poll.h sys/poll.h )
fi

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_RUN_IFELSE([AC_LANG_SOURCE([[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