building mit krb5 with gnutls crypto support

[sibu]

Greetings,

I am new to this list.  I am trying to build MIT krb5-1.14.   on a machine 
running BLFS 64-bit linux: ( kernel-4.4 ) I have gnutls-3.4.7 installed in 
/usr I passed  
--with-crypto-impl=gnuTLS and 
--with-pkinit-crypto-impl=gnuTLS  to comfigure  but  ./configure replies wih 
unknown crypto inplementation gnuTLS

QUESTION:Can MIT krb5 be compiled with gnutls support and if so how is this 
done?

thanks in advance
sincerely
sibuXolo