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

Calculating dependencies ... done!
Dependency resolution took 1.51 s (backtrack: 0/20).

[ebuild     U  ] net-libs/libmicrohttpd-1.0.3:0/12::gentoo [1.0.1-r1:0/12::gentoo] USE="epoll eventfd ssl thread-names -debug -static-libs -test -verify-sig" 2054 KiB

Total: 1 package (1 upgrade), Size of downloads: 2054 KiB