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/utfcpp-4.0.6::gentoo  USE="-test" 34 KiB
[ebuild  N     ] media-libs/taglib-2.3.1:0/2::gentoo  USE="-doc -examples -test" 1558 KiB

Total: 2 packages (2 new), Size of downloads: 1591 KiB