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

Calculating dependencies ... done!
Dependency resolution took 0.99 s (backtrack: 0/20).

[ebuild  N     ] dev-libs/mxml-3.3.1-r1::gentoo  USE="threads -static-libs" 1519 KiB

Total: 1 package (1 new), Size of downloads: 1519 KiB