gonzales ~ # emerge -p pure-ftpd

These are the packages that would be merged, in order:

Calculating dependencies... done!
[nomerge      ] net-ftp/pure-ftpd-1.0.21-r1  USE="ldap mysql pam ssl vchroot -caps -charconv -noiplog -paranoidmsg -postgres (-selinux) -xinetd"
[nomerge      ]  net-nds/openldap-2.3.38  USE="berkdb crypt gdbm ipv6 perl readline sasl ssl tcpd -debug -kerberos -minimal -odbc -overlays -samba (-selinux) -slp -smbkrb5passwd"
[ebuild  N    ]   dev-libs/cyrus-sasl-2.1.22-r2  USE="berkdb crypt gdbm java ldap mysql pam ssl -authdaemond -kerberos -ntlm_unsupported_patch -postgres -sample -srp -urandom"
[ebuild  N    ]    net-nds/openldap-2.3.38  USE="berkdb crypt gdbm ipv6 perl readline sasl ssl tcpd -debug -kerberos -minimal -odbc -overlays -samba (-selinux) -slp -smbkrb5passwd"
!!! Error: circular dependencies:

('ebuild', '/', 'net-nds/openldap-2.3.38', 'merge') depends on
   ('ebuild', '/', 'dev-libs/cyrus-sasl-2.1.22-r2', 'merge') (hard)
('ebuild', '/', 'dev-libs/cyrus-sasl-2.1.22-r2', 'merge') depends on
   ('ebuild', '/', 'net-nds/openldap-2.3.38', 'merge') (hard)

!!! Note that circular dependencies can often be avoided by temporarily
!!! disabling USE flags that trigger optional dependencies.