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/gmime-3.2.15-r1:3.0::gentoo  USE="crypt -doc -idn -test -vala" 2182 KiB

Total: 1 package (1 new), Size of downloads: 2182 KiB