In order to compile games-roguelike/dwarf-fortress (Bug #290294) on amd64, media-libs/fmod needs to install 32 bit libs. I've created a modified fmod with the multilib use flag for reference.
Created attachment 219587 [details, diff] fmod-4.26.00_multilib.patch
fmos won't be added until dwarf-foress is added to the tree (for x86 for example)
Closing then