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

Calculating dependencies ... done!
Dependency resolution took 1.10 s (backtrack: 0/20).

[ebuild  N     ] x11-libs/libXcursor-1.2.3::gentoo  USE="-doc" 286 KiB
[ebuild  N     ] x11-libs/libXinerama-1.1.6::gentoo  USE="-doc" 263 KiB
[ebuild  N     ] x11-libs/fltk-1.3.8:1::gentoo  USE="cairo opengl (static-libs) threads xft xinerama -debug -doc -examples -games" 5211 KiB

Total: 3 packages (3 new), Size of downloads: 5759 KiB