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

Calculating dependencies ... done!
Dependency resolution took 1.53 s (backtrack: 0/20).

[ebuild     U  ] net-libs/libpcap-1.10.7::gentoo [1.10.6::gentoo] USE="dbus -bluetooth -netlink -rdma -remote -static-libs -test -usb -verify-sig -yydebug" 972 KiB

Total: 1 package (1 upgrade), Size of downloads: 972 KiB