[exim] lastest snapshot and openldap1

I built exim 4.43 without problems with openldap1 but get the following
error with the latest snapshot (4.46)

gcc -c -O -I/disk3/qq11/openldap-1.2.11/include dsearch.c
gcc -c -O -I/disk3/qq11/openldap-1.2.11/include ibase.c
gcc -c -O -I/disk3/qq11/openldap-1.2.11/include ldap.c
ldap.c: In function `perform_ldap_search':
ldap.c:794: `LDAP_RES_SEARCH_REFERENCE' undeclared (first use in this
function)
ldap.c:794: (Each undeclared identifier is reported only once
ldap.c:794: for each function it appears in.)
*** Error code 1
make: Fatal error: Command failed for target `ldap.o'

I'm aware that openldap 1 is not exactly new/current but exim claims to
still support it (solaris 2.8).

Thanks

-- 
Alan Thew                                       alan.thew@???
Computing Services, University of Liverpool     Fax: +44 151 794-4442