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-5.5.1:0/5.5.1::gentoo  USE="ocamlopt -emacs -flambda -latex -test -xemacs" 6457 KiB
[ebuild  N     ] dev-ml/findlib-1.9.8-r1:0/1::gentoo  USE="ocamlopt -doc -tk" 269 KiB
[ebuild  N     ] dev-ml/camlpdf-2.8.1:0/2.8.1::gentoo  USE="ocamlopt -doc -examples" 828 KiB
[ebuild  N     ] app-text/cpdf-2.8.1::gentoo  USE="ocamlopt -doc" 1700 KiB

Total: 4 packages (4 new), Size of downloads: 9252 KiB