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

Calculating dependencies ... done!
Dependency resolution took 0.98 s (backtrack: 0/20).

[ebuild  N     ] dev-build/automake-vanilla-1.18.1-r1:1.18::gentoo  USE="-test" 1614 KiB

Total: 1 package (1 new), Size of downloads: 1614 KiB