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

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

[ebuild  N     ] dev-libs/libconfig-1.8.2:0/15::gentoo  USE="cxx -debug -static-libs -test" 3262 KiB
[ebuild  N     ] app-misc/dfshow-0.10.3_beta::gentoo  311 KiB

Total: 2 packages (2 new), Size of downloads: 3572 KiB