undefined reference to gnutls_certificate_get_x509_cas -HELP

["lux-integ" <lux-integ@btconnect.com>]

Greetings

I am trying to compile openldap-2.4.39 on   machine with linux (amd64 cpu) and 
gnutls-3.3.8.  I passed  
--with-tls=gnutls to the configure options.
 The 'make' ends   in failue   with the  errors:-
" undefined reference to gnutls_certificate_get_x509_cas"
" undefined reference to gcry_control"

It compiles  if I remove the  --with-tls=gnutls option
but I want to use gnutls.

I would be grateful for some help. 

Yours sincerely
luxInteg