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

Calculating dependencies ... done!
Dependency resolution took 0.98 s (backtrack: 0/20).

[ebuild  N     ] dev-libs/libclthreads-2.4.2::gentoo  15 KiB
[ebuild  N     ] x11-libs/libclxclient-3.9.2-r1::gentoo  30 KiB

Total: 2 packages (2 new), Size of downloads: 44 KiB