I'm working on RISCV64 support for a while and would like to know the chances of it being accepted. WOW64 with emulation dlls (Hangover style) is already working somewhat, not perfectly, but I'm not done yet. That's also the main goal, having RISCV64 Wine built as Unix to run new WOW64 on top of it with emulators. Cleanup/Fixing is still in progress, so this draft only contains early bits.