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

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

[ebuild  N     ] dev-libs/cxxopts-3.3.1:0/3.3.1::gentoo  USE="-icu -test" 158 KiB

Total: 1 package (1 new), Size of downloads: 158 KiB