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

Calculating dependencies ... done!
Dependency resolution took 1.07 s (backtrack: 0/20).

[ebuild   R    ] app-crypt/libb2-0.98.1-r3::gentoo  USE="openmp -native-cflags -static-libs" 275 KiB

Total: 1 package (1 reinstall), Size of downloads: 275 KiB