rebuilding rpm for RH9 error

Hi all,
I'm still experiencing problem trying to
rebuild the rpm from the file:
postgresql-7.4-0.5PGDG.src.rpm

what I get is:

checking for library containing com_err... -lcom_err
checking for library containing krb5_encrypt... no
configure: error: could not find function 'krb5_encrypt' required for 
Kerberos 5
error: Bad exit status from /var/tmp/rpm-tmp.40171 (%build)


I seen that the configure is done with:
--with-krb5=/usr.


I also try to install the RPM already builded but I obtain:
file /usr/include/sqltypes.h from install of 
postgresql-devel-7.4-0.5PGDG conflicts with file from package 
unixODBC-devel-2.2.3-6


Regards
Gaetano Mendola