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

Calculating dependencies ... done!
Dependency resolution took 1.01 s (backtrack: 0/20).

[ebuild  N     ] dev-lang/ocaml-4.14.2:0/4.14.2::gentoo  USE="ocamlopt -emacs -flambda -latex -xemacs" 5377 KiB
[ebuild  N     ] dev-ml/lablgl-1.06-r2:0/1.06::gentoo  USE="ocamlopt -doc -glut -tk" 554 KiB

Total: 2 packages (2 new), Size of downloads: 5931 KiB