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

Calculating dependencies ... done!
Dependency resolution took 0.99 s (backtrack: 0/20).

[ebuild  N     ] media-libs/flac-compat-1.4.3:12.1.0::gentoo  USE="cxx -ogg" CPU_FLAGS_X86="avx" 984 KiB

Total: 1 package (1 new), Size of downloads: 984 KiB