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

Calculating dependencies ... done!
Dependency resolution took 1.01 s (backtrack: 0/20).

[ebuild  N     ] dev-libs/libcdada-0.6.4::gentoo  USE="-test" 1741 KiB
[ebuild  N     ] net-analyzer/pmacct-1.7.9::gentoo  USE="bgp-bins bmp-bins l2 sqlite st-bins traffic-bins -geoipv2 -jansson -kafka -mysql -ndpi -nflog -postgres -rabbitmq -zmq" 2083 KiB

Total: 2 packages (2 new), Size of downloads: 3823 KiB