Build instructions for cross-compilation environment

["Philip A. Prindeville" <philipp_subx@redfish-solutions.com>]

Hi.

I'm the lead developer for Astlinux.

We're doing a kernel bump from 2.6.26.8 to 2.6.27.26, and wanted to take
the opportunity to start using compat-wireless at the same time, because
we need (amongst other things) better mac80211/cfg80211/nl80211 and
AP-mode for the Ath5k chipset (AR5413, et al).

The README included in the tarball (compat-wireless-2.6.30.tar.bz2)
discusses building replacement drivers on the same system and placing
them into updates/.

I'd like to cross-compile this on a system and replace the drivers that
have been deposited by the plain-vanilla kernel build.

Also, a list of what CONFIG_xxx symbols I need to turn off to ensure
that there is no "residue" left over from the kernel build to interfere
with the compat-wireless build would be helpful (or alternatively,
what's the bare essential list of CONFIG_xxx symbols that need to be
enabled to "hook" compat-wireless into an existing kernel).

Looking at the Makefiles, it doesn't seem that cross-compilation is
ready out-of-the-box:

MADWIFI=$(shell $(MODPROBE) -l ath_pci)
OLD_IWL=$(shell $(MODPROBE) -l iwl4965)


Please reply to me directly (or even on Cc).  I tried to join the list a
couple of weeks ago, but my request hasn't yet been processed.

Thanks,

-Philip