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

Calculating dependencies ... done!
Dependency resolution took 0.96 s (backtrack: 0/20).

[ebuild  N     ] dev-lang/ocaml-5.4.0:0/5.4.0::gentoo  USE="ocamlopt -emacs -flambda -latex -test -xemacs" 6298 KiB

Total: 1 package (1 new), Size of downloads: 6298 KiB