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

Calculating dependencies ... done!
Dependency resolution took 1.04 s (backtrack: 0/20).

[ebuild   R    ] sys-libs/pam-1.7.2::gentoo  USE="nls -audit -berkdb -debug -elogind -examples -nis (-selinux) (-systemd) -verify-sig" 500 KiB

Total: 1 package (1 reinstall), Size of downloads: 500 KiB