Do we need ARM build for arduino while interfacing R-pi and arduino I wonder whats ARM build for Linux? Do we really need ARM build when we work with arduino? I need to integrate arduino and raspberry pi over wi-fi, I don't know whether I need ARM in this case. Also any quick learning tutorial for interfacing two of these hardware is appreciable

A newbie to Arduino. I hope fun learning with it
The ARM build of the IDE is for running the IDE on ARM systems. If you want to run the IDE on the pi then you need the arm build. However if you want to run the IDE on your PC then you need the IDE build that matches the architecture of your pc.

There are a million and one ways of communicating wirelessly between an Arduino and a pi.