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

Calculating dependencies ... done!
Dependency resolution took 1.02 s (backtrack: 0/20).

[ebuild  N     ] dev-cpp/simdutf-9.0.0:0/34::gentoo  USE="-doc -test" 2381 KiB

Total: 1 package (1 new), Size of downloads: 2381 KiB