Embedding a variable upon compile

[nappington]

I'm just curious if it's possible to embed a variable when compiling undionly.kpxe

We have a situation where we need multiple serial baud rates - we have the ability specify which version of undionly.kpxe to use for that specific baud rate/machine that netboots, but we need a way to pass through the baud rate to the next installer.

Currently we have the ability to alter the version setting (http://ipxe.org/cfg/version) during compile, but we'd rather not use that method. I'm curious if there are any other settings/variables that we can alter the contents of.

Thanks!