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

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

[ebuild  N     ] sci-astronomy/wcslib-8.3-r1:0/8::gentoo  USE="tools -doc -fits -fortran -pgplot -static-libs" 3170 KiB

Total: 1 package (1 new), Size of downloads: 3170 KiB