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/lrslib-071b-r1::gentoo  USE="gmp -mpi" 456 KiB

Total: 1 package (1 new), Size of downloads: 456 KiB