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

Calculating dependencies ... done!
Dependency resolution took 0.97 s (backtrack: 0/20).

[ebuild  N     ] dev-libs/ffcall-2.5::gentoo  1418 KiB
[ebuild  N     ] dev-lang/gforth-0.7.3-r2::gentoo  USE="check -emacs" 2465 KiB

Total: 2 packages (2 new), Size of downloads: 3883 KiB