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

Calculating dependencies ... done!
Dependency resolution took 1.50 s (backtrack: 0/20).

[ebuild     U  ] dev-libs/libunistring-1.4.2:0/5::gentoo [1.3:0/5::gentoo] USE="-doc -static-libs" 2721 KiB

Total: 1 package (1 upgrade), Size of downloads: 2721 KiB