configure.in

			dnl check for both
			AC_CHECK_FUNCS(sched_yield pthread_yield)

			if test $ac_cv_func_sched_yield = no -a \
				$ac_cv_func_pthread_yield = no ; then
				dnl Digital UNIX has sched_yield() in -lrt
				AC_CHECK_LIB(rt, sched_yield,
					[LTHREAD_LIBS="$LTHREAD_LIBS -lrt"
					AC_DEFINE(HAVE_SCHED_YIELD,1,
						[Define if you have the sched_yield function.])
					ac_cv_func_sched_yield=yes],
					[ac_cv_func_sched_yield=no])
			fi
			if test $ac_cv_func_sched_yield = no -a \
				$ac_cv_func_pthread_yield = no ; then
				dnl Solaris has sched_yield() stub in -lposix4
				dnl but we'll use thr_yield instead.
				AC_CHECK_FUNCS(thr_yield)
			fi
			if test $ac_cv_func_sched_yield = no -a \
				$ac_cv_func_pthread_yield = no -a \
				"$ac_cv_func_thr_yield" = no ; then
				AC_MSG_WARN([could not locate sched_yield() or pthread_yield()])
			fi

			dnl Check functions for compatibility
			AC_CHECK_FUNCS(pthread_kill)

			dnl Check for pthread_detach with <pthread.h> inclusion
			dnl as it's symbol may have been mangled.
			AC_CACHE_CHECK([for pthread_detach with <pthread.h>],
				[ol_cv_func_pthread_detach], [
				dnl save the flags
				AC_TRY_LINK([
#include <pthread.h>
#ifndef NULL
#define NULL (void*)0
#endif
],
					[pthread_detach(NULL);],
					[ol_cv_func_pthread_detach=yes],
					[ol_cv_func_pthread_detach=no])
			])

			if test $ol_cv_func_pthread_detach = no ; then
				AC_MSG_ERROR([could not locate pthread_detach()])
			fi

			AC_DEFINE(HAVE_PTHREAD_DETACH,1,
				[define if you have pthread_detach function])

			dnl Check for setconcurreny functions
			AC_CHECK_FUNCS(	\
				pthread_setconcurrency \
				pthread_getconcurrency \
				thr_setconcurrency \
				thr_getconcurrency \
			)

			OL_SYS_LINUX_THREADS
			OL_LINUX_THREADS

			if test $ol_cv_linux_threads = error; then
				AC_MSG_ERROR([LinuxThreads header/library mismatch]);
			fi

			AC_CACHE_CHECK([if pthread_create() works],
				ol_cv_pthread_create_works,[
			AC_TRY_RUN(OL_PTHREAD_TEST_PROGRAM,
				[ol_cv_pthread_create_works=yes],
				[ol_cv_pthread_create_works=no],
				[dnl assume yes
				ol_cv_pthread_create_works=yes])])

			if test $ol_cv_pthread_create_works = no ; then
				AC_MSG_ERROR([pthread_create is not usable, check environment settings])
			fi

			dnl Check if select causes an yield
			if test $ol_with_yielding_select = auto ; then
				AC_CACHE_CHECK([if select yields when using pthreads],
					ol_cv_pthread_select_yields,[
				AC_TRY_RUN([
#include <sys/types.h>
#include <sys/time.h>
#include <unistd.h>
#include <pthread.h>
#ifndef NULL
#define NULL (void*) 0
#endif

static int fildes[2];

static void *task(p)
	void *p;
{
	int i;
	struct timeval tv;

	fd_set rfds;

	tv.tv_sec=10;
	tv.tv_usec=0;

	FD_ZERO(&rfds);
	FD_SET(fildes[0], &rfds);

	/* we're not interested in any fds */
	i = select(FD_SETSIZE, &rfds, NULL, NULL, &tv);

	if(i < 0) {
		perror("select");
		exit(10);
	}

	exit(0); /* if we exit here, the select blocked the whole process */
}

int main(argc, argv)
	int argc;
	char **argv;
{
	pthread_t t;

	/* create a pipe to select */
	if(pipe(&fildes[0])) {
		perror("select");
		exit(1);
	}

#ifdef HAVE_PTHREAD_SETCONCURRENCY
	(void) pthread_setconcurrency(2);
#else
#ifdef HAVE_THR_SETCONCURRENCY
	/* Set Solaris LWP concurrency to 2 */
	thr_setconcurrency(2);
#endif
#endif

#if HAVE_PTHREADS_D4
	pthread_create(&t, pthread_attr_default, task, NULL);
#else
	pthread_create(&t, NULL, task, NULL);
#endif

#if HAVE_SCHED_YIELD
	sched_yield();	/* make sure task runs first */
#else
#ifdef HAVE_PTHREAD_YIELD
	pthread_yield();	/* make sure task runs first */
#endif
#endif

	exit(2);
}],
				[ol_cv_pthread_select_yields=no],
				[ol_cv_pthread_select_yields=yes],
				[ol_cv_pthread_select_yields=cross])])

				if test $ol_cv_pthread_select_yields = cross ; then
					AC_MSG_ERROR([crossing compiling: use --with-yielding_select=yes|no|manual])
				fi

				if test $ol_cv_pthread_select_yields = yes ; then
					ol_with_yielding_select=yes
				fi
			fi

			dnl restore flags
			CPPFLAGS="$save_CPPFLAGS"
			LIBS="$save_LIBS"
		else
			AC_MSG_ERROR([could not link with POSIX Threads])
		fi
	fi

	if test $ol_with_threads = posix ; then
		AC_MSG_ERROR([could not locate POSIX Threads])
	fi
fi

if test $ol_with_threads = auto -o $ol_with_threads = yes \
	-o $ol_with_threads = mach ; then

	dnl check for Mach CThreads
	AC_CHECK_HEADERS(mach/cthreads.h)
	if test $ac_cv_header_mach_cthreads_h = yes ; then
		ol_with_threads=found

		dnl check for cthread support in current $LIBS
		AC_CHECK_FUNC(cthread_fork,[ol_link_threads=yes])

		if test $ol_link_threads = no ; then
			dnl try -all_load
			dnl this test needs work
			AC_CACHE_CHECK([for cthread_fork with -all_load],
				[ol_cv_cthread_all_load], [
				dnl save the flags
				save_LIBS="$LIBS"
				LIBS="-all_load $LIBS"
				AC_TRY_LINK([#include <mach/cthreads.h>],[
					cthread_fork((void *)0, (void *)0);
					], ol_cv_cthread_all_load=yes, ol_cv_cthread_all_load=no)
				dnl restore the LIBS
				LIBS="$save_LIBS"
			])

			if test $ol_cv_cthread_all_load = yes ; then
				LTHREAD_LIBS="$LTHREAD_LIBS -all_load"
				ol_link_threads=mach
			fi
		fi

		if test $ol_link_threads != no ; then
			: check for cthread specific functionality here
			AC_DEFINE(HAVE_MACH_CTHREADS,1,
				[define if you have Mach Cthreads])
		else
			AC_MSG_ERROR([could not link with Mach CThreads])
		fi
	fi

	if test $ol_with_threads = mach ; then
		AC_MSG_ERROR([could not locate Mach CThreads])
	fi
fi

if test $ol_with_threads = auto -o $ol_with_threads = yes \
	-o $ol_with_threads = lwp ; then

	dnl check for SunOS5 LWP
	AC_CHECK_HEADERS(thread.h synch.h)
	if test $ac_cv_header_thread_h = yes -a $ac_cv_header_synch_h = yes ; then
		AC_CHECK_LIB(thread, thr_create, [have_thr=yes], [have_thr=no])

		if test $have_thr = yes ; then
			AC_DEFINE(HAVE_THR,1,
				[if you have Solaris LWP (thr) package])
			LTHREAD_LIBS="$LTHREAD_LIBS -lthread"
			ol_link_threads=thr

			if test $ol_with_yielding_select = auto ; then
				ol_with_yielding_select=yes
			fi

			dnl Check for setconcurreny functions
			AC_CHECK_FUNCS(	\
				thr_setconcurrency \
				thr_getconcurrency \
			)
		fi
	fi

	dnl check for SunOS4 LWP
	AC_CHECK_HEADERS(lwp/lwp.h)
	if test $ac_cv_header_lwp_lwp_h = yes ; then
		AC_CHECK_LIB(lwp, lwp_create, [have_lwp=yes], [have_lwp=no])

		if test $have_lwp = yes ; then
			AC_DEFINE(HAVE_LWP,1,
				[if you have SunOS LWP package])
			LTHREAD_LIBS="$LTHREAD_LIBS -llwp"
			ol_link_threads=lwp

			if test $ol_with_yielding_select = auto ; then
				ol_with_yielding_select=no
			fi
		fi
	fi
fi

if test $ol_with_yielding_select = yes ; then
	AC_DEFINE(HAVE_YIELDING_SELECT,1,
		[define if select implicitly yields])
fi

if test $ol_with_threads = manual ; then
	dnl User thinks he can manually configure threads.
	ol_link_threads=yes

	AC_MSG_WARN([thread defines and link options must be set manually])

	AC_CHECK_HEADERS(pthread.h sched.h)
	AC_CHECK_FUNCS(sched_yield pthread_yield)
	OL_HEADER_LINUX_THREADS

	AC_CHECK_HEADERS(mach/cthreads.h)
	AC_CHECK_HEADERS(lwp/lwp.h)
	AC_CHECK_HEADERS(thread.h synch.h)
fi

if test $ol_link_threads != no ; then  
	dnl needed to get reentrant/threadsafe versions
	dnl
	AC_DEFINE(REENTRANT,1)
	AC_DEFINE(_REENTRANT,1)
	AC_DEFINE(THREAD_SAFE,1)
	AC_DEFINE(_THREAD_SAFE,1)
	AC_DEFINE(THREADSAFE,1)
	AC_DEFINE(_THREADSAFE,1)
	AC_DEFINE(_SGI_MP_SOURCE,1)

	dnl The errno declaration may dependent upon _REENTRANT.
	dnl If it does, we must link with thread support.
	AC_CACHE_CHECK([for thread specific errno],
		[ol_cv_errno_thread_specific], [
		AC_TRY_LINK([#include <errno.h>], [errno = 0;],
			[ol_cv_errno_thread_specific=yes],
			[ol_cv_errno_thread_specific=no])
	])

	dnl The h_errno declaration may dependent upon _REENTRANT.
	dnl If it does, we must link with thread support.
	AC_CACHE_CHECK([for thread specific h_errno],
		[ol_cv_h_errno_thread_specific], [
		AC_TRY_LINK([#include <netdb.h>], [h_errno = 0;],
			[ol_cv_h_errno_thread_specific=yes],
			[ol_cv_h_errno_thread_specific=no])
	])

	if test $ol_cv_errno_thread_specific != yes \
		-o $ol_cv_h_errno_thread_specific != yes ; then
		LIBS="$LTHREAD_LIBS $LIBS"
		LTHREAD_LIBS=""
	fi

dnl When in thread environment, use 
dnl		#if defined( HAVE_REENTRANT_FUNCTIONS ) \ 
dnl			|| defined( HAVE_FUNC_R )
dnl			func_r(...);
dnl		#else
dnl		#	if defined( HAVE_THREADS ) 
dnl				/* lock */
dnl		#	endif
dnl				func(...);
dnl		#	if defined( HAVE_THREADS ) 
dnl				/* unlock */
dnl		#	endif
dnl		#endif
dnl
dnl HAVE_REENTRANT_FUNCTIONS is derived from:
dnl		_POSIX_REENTRANT_FUNCTIONS
dnl		_POSIX_THREAD_SAFE_FUNCTIONS
dnl		_POSIX_THREADSAFE_FUNCTIONS
dnl
dnl		and is currently defined in lthread.h
dnl
dnl HAVE_THREADS is defined by lthread.h iff -UNO_THREADS
dnl 
dnl libldap/*.c should only include <lthread.h> iff
dnl LDAP_R_COMPILE is defined.  ie:
dnl		#ifdef LDAP_R_COMPILE
dnl		#	include LDAP_R_COMPILE
dnl		#endif
dnl
dnl LDAP_R_COMPILE is defined by libldap_r/Makefile.in
dnl specifically for compiling the threadsafe version of
dnl	the ldap library (-lldap_r).
dnl		
dnl	dnl check for reentrant/threadsafe functions
dnl	dnl
dnl	dnl note: these should only be used when linking
dnl	dnl       with $LTHREAD_LIBS
dnl	dnl
dnl	save_CPPFLAGS="$CPPFLAGS"
dnl	save_LIBS="$LIBS"
dnl	LIBS="$LTHREAD_LIBS $LIBS"
dnl	AC_CHECK_FUNCS(	\
dnl		gmtime_r \
dnl		gethostbyaddr_r gethostbyname_r \
dnl		feof_unlocked unlocked_feof \
dnl		putc_unlocked unlocked_putc \
dnl		flockfile ftrylockfile \
dnl	)
dnl	CPPFLAGS="$save_CPPFLAGS"
dnl	LIBS="$save_LIBS"
fi  

if test $ol_link_threads = no ; then
	if test $ol_with_threads = yes ; then
		AC_MSG_ERROR([no suitable thread support])
	fi

	if test $ol_with_threads = auto ; then
		AC_MSG_WARN([no suitable thread support, disabling threads])
		ol_with_threads=no
	fi

	AC_DEFINE(NO_THREADS,1,
		[define if you have (or want) no threads])
	LTHREAD_LIBS=""
fi

if test $ol_link_threads != no ; then
	AC_DEFINE(LDAP_API_FEATURE_X_OPENLDAP_THREAD_SAFE,1)
fi

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

ol_link_ldbm=no 
if test $ol_with_ldbm_api = auto -o $ol_with_ldbm_api = db2 ; then
	OL_BERKELEY_DB2

	if test $ol_cv_berkeley_db2 = yes ; then
		ol_link_ldbm=db2
		ol_with_ldbm_api=db2

		if test $ol_with_ldbm_type = hash ; then
			AC_DEFINE(LDBM_USE_DBHASH,1,
				[define this to use DBHASH w/ LDBM backend])
		else
			AC_DEFINE(LDBM_USE_DBBTREE,1,
				[define this to use DBBTREE w/ LDBM backend])
		fi

		dnl $ol_cv_lib_db2 should be yes or -ldb
		dnl (it could be no, but that would be an error
		if test $ol_cv_lib_db2 != yes ; then
			LDBM_LIBS="$LDBM_LIBS $ol_cv_lib_db2"
		fi
	fi
fi

ol_link_bdb2=no
if test $ol_link_ldbm = db2 -a $ol_enable_bdb2 != no ; then
	ol_link_bdb2=yes
fi

if test $ol_with_ldbm_api = auto -o $ol_with_ldbm_api = db ; then
	OL_BERKELEY_DB

	if test $ol_cv_berkeley_db = yes ; then
		ol_link_ldbm=db
		ol_with_ldbm_api=db

		if test $ol_with_ldbm_type = hash ; then
			AC_DEFINE(LDBM_USE_DBHASH,1,
				[define this to use DBHASH w/ LDBM backend])
		else
			AC_DEFINE(LDBM_USE_DBBTREE,1,
				[define this to use DBBTREE w/ LDBM backend])
		fi

		dnl $ol_cv_lib_db should be yes or -ldb
		dnl (it could be no, but that would be an error
		if test $ol_cv_lib_db != yes ; then
			LDBM_LIBS="$LDBM_LIBS $ol_cv_lib_db"
		fi
	fi
fi

if test $ol_with_ldbm_api = manual ; then
	dnl User thinks he can manually configure LDBM api.
	ol_link_ldbm=yes

	AC_MSG_WARN([LDBM defines and link options must be set manually])

	AC_CHECK_HEADERS(db.h db_185.h gdbm.h ndbm.h)
fi

if test $ol_link_ldbm = no -a $ol_with_ldbm_type = btree ; then
	AC_MSG_WARN(Could not find LDBM with BTREE support)
	ol_with_ldbm_api=none
fi

if test $ol_with_ldbm_api = auto -o $ol_with_ldbm_api = mdbm ; then
	OL_MDBM

	if test $ol_cv_mdbm = yes ; then
		ol_link_ldbm=mdbm
		ol_with_ldbm_api=mdbm
		if test $ol_cv_lib_mdbm != yes ; then
			LDBM_LIBS="$LDBM_LIBS $ol_cv_lib_mdbm"
		fi
	fi
fi

if test $ol_with_ldbm_api = auto -o $ol_with_ldbm_api = gdbm ; then
	OL_GDBM

	if test $ol_cv_gdbm = yes ; then
		ol_link_ldbm=gdbm
		ol_with_ldbm_api=gdbm

		if test $ol_cv_lib_gdbm != yes ; then
			LDBM_LIBS="$LDBM_LIBS $ol_cv_lib_gdbm"
		fi
	fi
fi

if test $ol_with_ldbm_api = auto ; then
	AC_MSG_WARN([skipping automatic checking for NDBM, must be manually enabled.])
elif test $ol_with_ldbm_api = ndbm ; then
	OL_NDBM

	if test $ol_cv_ndbm = yes ; then
		ol_link_ldbm=ndbm
		ol_with_ldbm_api=ndbm

		if test $ol_cv_lib_ndbm != yes ; then
			LDBM_LIBS="$LDBM_LIBS $ol_cv_lib_ndbm"
		fi
	fi
fi

if test $ol_link_ldbm = no -a $ol_enable_ldbm != no ; then
	AC_MSG_WARN(could not find suitable LDBM backend)
	if test $ol_enable_ldbm = yes ; then
		AC_MSG_ERROR(select appropriate LDBM options or disable)
	fi

	AC_MSG_WARN(disabling LDBM)
	ol_enable_ldbm=no
fi

if test $ol_enable_wrappers != no ; then
	AC_CHECK_HEADERS(tcpd.h)

	if test $ac_cv_header_tcpd_h != yes ; then
		have_wrappers=no
	else
		AC_CHECK_LIB(wrap, main,
			[have_wrappers=yes], [have_wrappers=no])
	fi

	if test $have_wrappers = yes ; then
		AC_DEFINE(HAVE_TCPD,1, [define if you have -lwrap])
		SLAPD_LIBS="$SLAPD_LIBS -lwrap"

		dnl We add another check for -lnsl since some libwrap's
		dnl need it, but it isn't always included from above
		AC_CHECK_LIB(nsl, main)
	else
		AC_MSG_WARN(could not find -lwrap)
		if test $ol_enable_wrappers = yes ; then
			AC_MSG_ERROR(could not find wrappers, select appropriate options or disable)
		fi

		AC_MSG_WARN(disabling wrappers support)
		ol_enable_wrappers=no
	fi
fi

if test $ol_enable_syslog != no ; then
	AC_CHECK_FUNC(openlog)
	if test $ac_cv_func_openlog = no -a $ol_enable_syslog = yes; then
		AC_MSG_ERROR(could not find syslog, select appropriate options or disable)
	fi
	ol_enable_syslog=$ac_cv_func_openlog
fi

if test $ol_enable_dmalloc != no ; then
	AC_CHECK_HEADERS(dmalloc.h)
	AC_CHECK_LIB(dmalloc, dmalloc_shutdown)
fi

if test $ol_enable_tcl != no ; then
	AC_CHECK_HEADERS(tcl.h)

	if test $ac_cv_header_tcl_h != yes ; then
		have_tcl=no
	else
		AC_CHECK_LIB(tcl,main,
			[have_tcl=yes; SLAPD_LIBS="$SLAPD_LIBS -ltcl"],
			[have_tcl=no])

		if test $have_tcl != yes; then
			AC_CHECK_LIB(tcl7.6,main,
				[have_tcl=yes; SLAPD_LIBS="$SLAPD_LIBS -ltcl7.6"],
				[have_tcl=no])
		fi

		if test $have_tcl != yes; then
			AC_CHECK_LIB(tcl8.0,main,
				[have_tcl=yes; SLAPD_LIBS="$SLAPD_LIBS -ltcl8.0"],
				[have_tcl=no])
		fi
	fi

	if test $have_tcl != yes ; then
		AC_MSG_WARN([could not find -ltcl])
		if test $ol_enable_tcl = yes ; then
			AC_MSG_ERROR([could not find tcl, select appropriate options or disable])
		fi

		ol_enable_tcl=no
	fi
fi

# ud needs termcap (should insert check here)
ol_link_termcap=no
AC_CHECK_HEADERS(termcap.h ncurses.h)

if test $ol_link_termcap = no ; then
	AC_CHECK_LIB(termcap, tputs, [have_termcap=yes], [have_termcap=no])
	if test $have_termcap = yes ; then
		AC_DEFINE(HAVE_TERMCAP, 1, [define if you have -ltermcap])
		ol_link_termcap=yes
		TERMCAP_LIBS=-ltermcap
	fi
fi

if test $ol_link_termcap = no ; then
	AC_CHECK_LIB(ncurses, initscr, [have_ncurses=yes], [have_ncurses=no])
	if test $have_ncurses = yes ; then
		AC_DEFINE(HAVE_NCURSES, 1, [define if you have -lncurses])
		ol_link_termcap=yes
		TERMCAP_LIBS=-lncurses
	fi
fi

if test $ol_link_termcap = no ; then
	AC_DEFINE(NO_TERMCAP,1, [define if you have no termcap support])
	TERMCAP_LIBS=
fi

dnl
dnl Check for fetch URL support
dnl		should be extended to support other fetch URL APIs
dnl
ol_link_sasl=no
if test $ol_with_cyrus_sasl != no ; then
	AC_CHECK_HEADER(sasl.h)

	if test $ac_cv_header_sasl_h = yes ; then
		AC_CHECK_LIB(sasl, sasl_client_init,
			[have_cyrus_sasl=yes], [have_cyrus_sasl=no])

		if test $have_cyrus_sasl != no ; then
			SASL_LIBS="-lsasl"
			AC_DEFINE(HAVE_CYRUS_SASL,1,[define if you have Cyrus SASL])
			ol_link_sasl=yes
		fi
	fi

	if test $ol_link_sasl = no -a $ol_with_cyrus_sasl = yes ; then
		AC_MSG_ERROR(no suitable API for --with-cyrus-sasl=$ol_with_cyrus_sasl)
	fi
fi

dnl
dnl Check for fetch URL support
dnl		should be extended to support other fetch URL APIs
dnl
ol_link_fetch=no
if test $ol_with_fetch != no ; then
	OL_LIB_FETCH

	if test $ol_cv_lib_fetch != no ; then
		LDIF_LIBS="$LDIF_LIBS $ol_link_fetch"
		ol_link_fetch=freebsd

	elif test $ol_with_fetch != auto ; then
		AC_MSG_ERROR(no suitable API for --with-fetch=$ol_with_fetch)
	fi 
fi

dnl
dnl Check for GNU readline
dnl
ol_link_readline=no
if test $ol_with_readline != no ; then
	AC_CHECK_HEADERS(readline/readline.h readline/history.h)

	if test $ac_cv_header_readline_readline_h = yes ; then
		save_LIBS="$LIBS"
		LIBS="$TERMCAP_LIBS $LIBS"
		AC_CHECK_LIB(readline, readline, 
			[have_readline=yes], [have_readline=no])
		LIBS="$save_LIBS"
			
		if test $have_readline = yes ; then
			ol_with_readline=found
			ol_link_readline=yes

			READLINE_LIBS="-lreadline"
		fi
	fi
fi

if test $ol_link_readline = yes ; then
	AC_DEFINE(HAVE_READLINE, 1, [define if you have -lreadline])
fi


# FreeBSD (and others) have crypt(3) in -lcrypt
if test $ol_enable_crypt != no ; then
	AC_CHECK_FUNC(crypt, [have_crypt=yes], [
		AC_CHECK_LIB(crypt, crypt, [LUTIL_LIBS="$LUTIL_LIBS -lcrypt"
			have_crypt=yes], [have_crypt=no])])

	if test $have_crypt = yes ; then
		AC_DEFINE(HAVE_CRYPT,1, [define if crypt(3) is available])
	else
		AC_MSG_WARN(could not find crypt)
		if test $ol_enable_crypt = yes ; then
			AC_MSG_ERROR(could not find crypt, select appropriate options or disable)
		fi

		AC_MSG_WARN(disabling crypt support)
		ol_enable_crypt=no
	fi
fi

# FreeBSD (and others) have setproctitle(3) in -lutil
if test $ol_enable_proctitle != no ; then
	AC_CHECK_FUNC(setproctitle,	[have_setproctitle=yes], [
		AC_CHECK_LIB(util, setproctitle,
			[have_setproctitle=yes
			LUTIL_LIBS="$LUTIL_LIBS -lutil"],
			[have_setproctitle=no
			LIBOBJS="$LIBOBJS setproctitle.o"])])

	if test $have_setproctitle = yes ; then
		AC_DEFINE(HAVE_SETPROCTITLE,1,
			[define if setproctitle(3) is available])
	fi
fi

dnl ----------------------------------------------------------------
dnl Checks for typedefs, structures, and compiler characteristics.
AC_TYPE_GETGROUPS dnl requires AC_TYPE_UID_T
AC_TYPE_MODE_T
AC_TYPE_OFF_T
AC_TYPE_PID_T
AM_TYPE_PTRDIFF_T
AC_TYPE_SIGNAL
OL_TYPE_SIG_ATOMIC_T
AC_TYPE_SIZE_T
OL_TYPE_SOCKLEN_T
AC_STRUCT_ST_BLKSIZE
AC_HEADER_TIME
AC_STRUCT_TM
OL_STRUCT_PASSWD_PW_GECOS
OL_STRUCT_PASSWD_PW_PASSWD

OL_C_UPPER_LOWER
AC_C_CONST
OL_C_VOLATILE

if test $cross_compiling = yes ; then
	AC_DEFINE(CROSS_COMPILING, 1, [define if cross compiling])

	AC_DEFINE(LBER_INT_T,long)
	AC_DEFINE(LBER_TAG_T,long)
	AC_DEFINE(LBER_SOCKET_T,int)

else
	AC_C_BIGENDIAN
	AC_CHECK_SIZEOF(short) 
	AC_CHECK_SIZEOF(int) 
	AC_CHECK_SIZEOF(long)

	if test "$ac_cv_sizeof_int" -lt 4 ; then
		AC_MSG_WARN([OpenLDAP requires 'int' to be 32 bits or greater.])

		AC_DEFINE(LBER_INT_T,long)
		AC_DEFINE(LBER_TAG_T,long)
		AC_DEFINE(LBER_SOCKET_T,int)
	else
		AC_DEFINE(LBER_INT_T,int)
		AC_DEFINE(LBER_TAG_T,long)
		AC_DEFINE(LBER_SOCKET_T,int)
	fi
fi

AC_DEFINE(LBER_LEN_T,long)

dnl ----------------------------------------------------------------
dnl Checks for library functions.
AC_FUNC_MEMCMP
dnl AM_FUNC_MKTIME dnl checks for sys/time.h and unistd.h
AC_FUNC_STRFTIME
dnl AM_FUNC_STRTOD

OL_FUNC_INET_ATON

dnl we should use vfork instead of fork in a number of places...
dnl AC_FUNC_VFORK
AC_FUNC_VPRINTF

if test $ac_cv_func_vprintf = yes ; then
	dnl check for vsnprintf
	AC_CHECK_FUNCS(vsnprintf vsprintf)
fi

AC_CHECK_FUNCS(		\
	bcopy			\
	closesocket		\
	endgrent		\
	endpwent		\
	flock			\
	getdtablesize	\
	getgrgid		\
	gethostname		\
	getpass			\
	getpwuid		\
	getpwnam		\
	getspnam		\
	gettimeofday	\
	initgroups		\
	lockf			\
	memcpy			\
	memmove			\
	mkstemp			\
	read			\
	recv			\
	recvfrom		\
	setpwfile		\
	setgid			\
	setegid			\
	setsid			\
	setuid			\
	seteuid			\
	signal			\
	sigset			\
	snprintf		\
	strdup			\
	strerror		\
	strpbrk			\
	strrchr			\
	strsep			\
	strstr			\
	strtol			\
	strtoul			\
	strspn			\
	sysconf			\
	waitpid			\
	wait4			\
	write			\
	send			\
	sendto			\
)

dnl We actually may need to replace more than this.
AC_REPLACE_FUNCS(getopt tempnam)

dnl ----------------------------------------------------------------
# Check Configuration
OL_SYS_ERRLIST

dnl ----------------------------------------------------------------
dnl Sort out defines

if test "$ol_enable_debug" != no ; then
	AC_DEFINE(LDAP_DEBUG,1,
		[define this to add debugging code])
fi
if test "$ol_enable_syslog" = yes ; then
	AC_DEFINE(LDAP_SYSLOG,1,
		[define this to add syslog code])
fi
if test "$ol_enable_libui" = yes ; then
	AC_DEFINE(LDAP_LIBUI,1,
		[define this for LDAP User Interface support])
fi
if test "$ol_enable_cache" = no ; then
	AC_DEFINE(LDAP_NOCACHE,1,
		[define this to remove -lldap cache support])
fi
if test "$ol_enable_dns" != no ; then
	AC_DEFINE(LDAP_API_FEATURE_X_OPENLDAP_V2_DNS,LDAP_VENDOR_VERSION)
fi
if test "$ol_enable_proctitle" != no ; then
	AC_DEFINE(LDAP_PROCTITLE,1,
		[define this for LDAP process title support])
fi
if test "$ol_enable_referrals" != no ; then
	AC_DEFINE(LDAP_API_FEATURE_X_OPENLDAP_V2_REFERRALS,LDAP_VENDOR_VERSION)
fi
if test "$ol_enable_cldap" != no ; then
	AC_DEFINE(LDAP_CONNECTIONLESS,1,[define to support CLDAP])
fi

if test "$ol_enable_crypt" != no ; then
	AC_DEFINE(SLAPD_CRYPT,1,[define to support crypt(3) passwords])
fi
if test "$ol_enable_cleartext" != no ; then
	AC_DEFINE(SLAPD_CLEARTEXT,1,[define to support cleartext passwords])
fi
if test "$ol_enable_multimaster" != no ; then
	AC_DEFINE(SLAPD_MULTIMASTER,1,[define to support multimaster replication])
fi
if test "$ol_enable_phonetic" != no ; then
	AC_DEFINE(SLAPD_PHONETIC,1,[define to support phonetic])
fi
if test "$ol_enable_rlookups" != no ; then
	AC_DEFINE(SLAPD_RLOOKUPS,1,[define to support reverse lookups])
fi

if test "$ol_link_modules" != no ; then
	AC_DEFINE(SLAPD_MODULES,1,[define to support modules])
	BUILD_SLAPD=yes
	MODULES_LIBS=-lltdl
	SLAPD_MODULES_LDFLAGS="-dlopen self"
fi

if test "$ol_link_bdb2" != no ; then
	AC_DEFINE(SLAPD_BDB2,1,[define to support BDB2 backend])
	BUILD_SLAPD=yes
	BUILD_BDB2=yes
	if test "$ol_with_bdb2_module" != static ; then
		AC_DEFINE(SLAPD_BDB2_DYNAMIC,1,
			[define to support dynamic BDB2 backend])
		BUILD_BDB2=mod
		BUILD_BDB2_DYNAMIC=shared
		SLAPD_MODULES_LIST="$SLAPD_MODULES_LIST -dlopen \$(SLAP_DIR)back-bdb2/back_bdb2.la"
	fi
fi

if test "$ol_enable_ldap" != no ; then
	AC_DEFINE(SLAPD_LDAP,1,[define to support LDAP backend])
	BUILD_SLAPD=yes
	BUILD_LDAP=yes
	if test "$ol_with_ldap_module" != static ; then
		AC_DEFINE(SLAPD_LDAP_DYNAMIC,1,
			[define to support dynamic LDAP backend])
		BUILD_LDAP=mod
		BUILD_LDAP_DYNAMIC=shared
		SLAPD_MODULES_LIST="$SLAPD_MODULES_LIST -dlopen \$(SLAP_DIR)back-ldap/back_ldap.la"
	fi
fi

if test "$ol_link_ldbm" != no ; then
	AC_DEFINE(SLAPD_LDBM,1,[define to support LDBM backend])
	BUILD_SLAPD=yes
	BUILD_LDBM=yes
	if test "$ol_with_ldbm_module" != static ; then
		AC_DEFINE(SLAPD_LDBM_DYNAMIC,1,
			[define to support dynamic LDBM backend])
		BUILD_LDBM=mod
		BUILD_LDBM_DYNAMIC=shared
		SLAPD_MODULES_LIST="$SLAPD_MODULES_LIST -dlopen \$(SLAP_DIR)back-ldbm/back_ldbm.la"
	fi
fi

if test "$ol_enable_passwd" != no ; then
	AC_DEFINE(SLAPD_PASSWD,1,[define to support PASSWD backend])
	BUILD_SLAPD=yes
	BUILD_PASSWD=yes
	if test "$ol_with_passwd_module" != static ; then
		AC_DEFINE(SLAPD_PASSWD_DYNAMIC,1,
			[define to support dynamic PASSWD backend])
		BUILD_PASSWD=mod
		BUILD_PASSWD_DYNAMIC=shared
		SLAPD_MODULES_LIST="$SLAPD_MODULES_LIST -dlopen \$(SLAP_DIR)back-passwd/back_passwd.la"
	fi
fi

if test "$ol_link_perl" != no ; then
	AC_DEFINE(SLAPD_PERL,1,[define to support PERL backend])
	BUILD_SLAPD=yes
	BUILD_PERL=yes
	if test "$ol_with_perl_module" != static ; then
		AC_DEFINE(SLAPD_PERL_DYNAMIC,1,
			[define to support dynamic PERL backend])
		BUILD_PERL=mod
		BUILD_PERL_DYNAMIC=shared
		SLAPD_MODULES_LIST="$SLAPD_MODULES_LIST -dlopen \$(SLAP_DIR)back-perl/back_perl.la"
	fi
fi

if test "$ol_enable_shell" != no ; then
	AC_DEFINE(SLAPD_SHELL,1,[define to support SHELL backend])
	BUILD_SLAPD=yes
	BUILD_SHELL=yes
	if test "$ol_with_shell_module" != static ; then
		AC_DEFINE(SLAPD_SHELL_DYNAMIC,1,
			[define to support dynamic SHELL backend])
		BUILD_SHELL=mod
		BUILD_SHELL_DYNAMIC=shared
		SLAPD_MODULES_LIST="$SLAPD_MODULES_LIST -dlopen \$(SLAP_DIR)back-shell/back_shell.la"
	fi
fi

if test "$ol_enable_tcl" != no ; then
	AC_DEFINE(SLAPD_TCL,1,[define to support TCL backend])
	BUILD_SLAPD=yes
	BUILD_TCL=yes
	if test "$ol_with_tcl_module" != static; then
		AC_DEFINE(SLAPD_TCL_DYNAMIC,1,
			[define to support dynamic TCL backend])
		BUILD_TCL=mod
		BUILD_TCL_DYNAMIC=shared
		SLAPD_MODULES_LIST="$SLAPD_MODULES_LIST -dlopen \$(SLAP_DIR)back-tcl/back_tcl.la"
	fi
fi

if test "$ol_enable_slurpd" != no -a "$ol_link_threads" != no -a \
	$BUILD_SLAPD = yes ; then
	BUILD_SLURPD=yes
fi

if test "$ol_link_isode" != no ; then
	BUILD_LDAPD=yes
fi

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

AC_SUBST(BUILD_LDAPD)