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-lang/cxprolog-0.98.2-r3::gentoo  USE="readline -examples -java -test -wxwidgets" 536 KiB

Total: 1 package (1 new), Size of downloads: 536 KiB