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

Calculating dependencies ... done!
Dependency resolution took 0.96 s (backtrack: 0/20).

[ebuild  N     ] media-libs/gmmlib-22.10.1:0/12.3::gentoo  USE="custom-cflags -test" 867 KiB

Total: 1 package (1 new), Size of downloads: 867 KiB