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

Calculating dependencies ... done!
Dependency resolution took 0.96 s (backtrack: 0/20).

[ebuild  N     ] dev-libs/libffi-compat-3.2.1-r3:6::gentoo  USE="-debug -pax-kernel -test" 919 KiB

Total: 1 package (1 new), Size of downloads: 919 KiB