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

Calculating dependencies ... done!
Dependency resolution took 1.06 s (backtrack: 0/20).

[ebuild  N     ] dev-libs/libaio-0.3.113_p8::gentoo  USE="-static-libs -test" 74 KiB
[ebuild  N     ] acct-group/sanlock-0-r3::gentoo  0 KiB
[ebuild  N     ] acct-user/sanlock-0-r3::gentoo  0 KiB
[ebuild  N     ] sys-fs/lvm2-2.03.39::gentoo  USE="readline udev -lvm -nvme -sanlock (-selinux) -static -static-libs (-systemd) -test -thin -valgrind -vdo -xfs" 2811 KiB
[ebuild  N     ] sys-cluster/sanlock-5.1.0-r3::gentoo  USE="(-selinux)" 251 KiB

Total: 5 packages (5 new), Size of downloads: 3135 KiB