emerge command
emerge -vauDN world
[ebuild N ] gnome-extra/evolution-data-server-3.12.4:0/49 USE="gnome-online-accounts gtk introspection ipv6 vala weather -api-doc-extras -kerberos -ldap {-test}" 0 kB
Full build.log snipped when it beings to repeat https://gist.githubusercontent.com/absmith/65691b39222d8e022f89/raw/gistfile1.txt eselect profile list http://dpaste.com/26AJXBD