Cross-compiling clarifications

[Dmitry Makovey]

Hi, I found it refreshing to see documentation actually covering cross-compilation, but I'm left with a bit of a question:

documentation calls for initial configuration and compilation for the buildA (build node) . Should I worry to replicate same configuration flags here as I'll be using for final build? My guess here would be "yes" but I'd like to clarify before descending down the rabbit hole.