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

Calculating dependencies ... done!
Dependency resolution took 1.06 s (backtrack: 0/20).

[ebuild  N     ] virtual/fortran-0-r1::gentoo  USE="openmp" 0 KiB
[ebuild  N     ] sci-libs/coinor-utils-2.11.12:0/3::gentoo  USE="bzip2 zlib -blas -doc -glpk -lapack -static-libs -test" 1216 KiB
[ebuild  N     ] sci-libs/coinor-osi-0.108.11:0/1::gentoo  USE="-doc -examples -static-libs -test" 1014 KiB
[ebuild  N     ] sci-libs/coinor-flopcpp-1.2.5::gentoo  USE="-doc" 602 KiB

Total: 4 packages (4 new), Size of downloads: 2831 KiB