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

Calculating dependencies ... done!
Dependency resolution took 1.00 s (backtrack: 0/20).

[ebuild  N     ] media-libs/libcdaudio-0.99.12-r5::gentoo  349 KiB
[ebuild  N     ] x11-misc/bbcd-0.3.1-r5::gentoo  74 KiB

Total: 2 packages (2 new), Size of downloads: 422 KiB