Liunx 64bit environment

host:ubuntu12.04 64bit

Digi ESP for Embedded Linux
Version: 2.0 for Digi Embedded Linux
Build id: 20130211 DEL-

When I compile it in 64bit environment:
Should I add optional -m32?

Are you talking about compiling an application or kernel inside DEL? then you are crosscompiling and you do not need to do anything else as long as DigiESP is up and running.

I was able to do it without an option.
Thank you.