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

Calculating dependencies ... done!
Dependency resolution took 0.97 s (backtrack: 0/20).

[ebuild   R    ] sys-devel/m4-1.4.21::gentoo  USE="nls -examples -verify-sig" 2032 KiB

Total: 1 package (1 reinstall), Size of downloads: 2032 KiB