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

Calculating dependencies ... done!
Dependency resolution took 1.13 s (backtrack: 0/20).

[ebuild  N     ] dev-db/lmdb-0.9.36:0/0.9.36::gentoo  USE="-static-libs" 147 KiB
[ebuild  N     ] acct-group/ldap-0-r2::gentoo  0 KiB
[ebuild  N     ] dev-libs/cyrus-sasl-2.1.28-r5:2::gentoo  USE="gdbm pam sqlite ssl -authdaemond -berkdb -kerberos -ldapdb -mysql -openldap -postgres -sample (-selinux) -srp -static-libs -urandom" 3945 KiB
[ebuild  N     ] dev-perl/Convert-ASN1-0.340.0::gentoo  USE="-test" PERL_FEATURES="ithreads (-debug) -quadmath" 78 KiB
[ebuild  N     ] acct-user/ldap-0-r2::gentoo  0 KiB
[ebuild  N     ] net-nds/openldap-2.6.14:0/2.6::gentoo  USE="cleartext crypt sasl ssl syslog -argon2 -autoca -cxx -debug -experimental -gnutls -iodbc -kerberos -kinit -minimal -odbc -overlays -pbkdf2 -perl -samba (-selinux) -sha2 -smbkrb5passwd -static-libs (-systemd) -tcpd -test -verify-sig" 6372 KiB
[ebuild  N     ] dev-perl/Net-LDAPapi-3.0.7-r1::gentoo  USE="-examples -test" PERL_FEATURES="ithreads (-debug) -quadmath" 67 KiB

Total: 7 packages (7 new), Size of downloads: 10608 KiB

The following USE changes are necessary to proceed:
 (see "package.use" in the portage(5) man page for more details)
# required by dev-perl/Net-LDAPapi-3.0.7-r1::gentoo
# required by =dev-perl/Net-LDAPapi-3.0.7-r1 (argument)
>=net-nds/openldap-2.6.14 sasl