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

Calculating dependencies ... done!
Dependency resolution took 0.99 s (backtrack: 0/20).

[ebuild  N     ] dev-games/physfs-3.2.0::gentoo  USE="zip -7zip -doc -grp -hog -iso -mvl -qpak -slb -static-libs -vdf -wad" 238 KiB

Total: 1 package (1 new), Size of downloads: 238 KiB