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

Calculating dependencies ... done!
Dependency resolution took 1.02 s (backtrack: 0/20).

[ebuild  N     ] app-admin/cronolog-1.6.2-r7::gentoo  131 KiB
[ebuild  N     ] app-admin/fifo-cronolog-1.2.3-r1::gentoo  5 KiB

Total: 2 packages (2 new), Size of downloads: 135 KiB