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

Calculating dependencies ... done!
Dependency resolution took 1.00 s (backtrack: 0/20).

[ebuild  N     ] dev-libs/mxml-4.0.4:4::gentoo  USE="threads -static-libs -test" 1540 KiB

Total: 1 package (1 new), Size of downloads: 1540 KiB