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

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

[ebuild  N     ] sci-libs/atlas-3.10.3::gentoo  USE="threads -doc -fortran -generic -lapack -static-libs" 5036 KiB

Total: 1 package (1 new), Size of downloads: 5036 KiB