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

Calculating dependencies ... done!
Dependency resolution took 1.06 s (backtrack: 0/20).

[ebuild  N     ] dev-libs/libatomic_ops-7.10.0::gentoo  531 KiB
[ebuild  N     ] dev-libs/boehm-gc-8.2.12::gentoo  USE="large threads -cxx -static-libs" 1204 KiB
[ebuild  N     ] www-client/w3m-0.5.6::gentoo  USE="X gpm nls ssl unicode -fbcon -gdk-pixbuf -imlib -lynxkeymap -nntp -xface" L10N="-ja" 2268 KiB
[ebuild  N     ] virtual/w3m-1::gentoo  0 KiB

Total: 4 packages (4 new), Size of downloads: 4001 KiB