Undefined reference to functions that are a part of amd64 ABI

[Utkarsh Anand]

Hello! I was trying to compile neovim (https://github.com/neovim/neovim)
in OpenBSD 6.2 and I get the following error when compiling LuaJIT, 
which is dependency for neovim:
http://termbin.com/5zyd
The functions _Unwind_* are a part of amd64 ABI:
https://uclibc.org/docs/psABI-x86_64.pdf
Do I need to link a library externally for that? It compiles directly 
on other systems like NetBSD, linux etc.