From mboxrd@z Thu Jan  1 00:00:00 1970
From: Mike Frysinger <vapier@gentoo.org>
Date: Sun, 16 Nov 2008 12:30:54 -0500
Subject: [U-Boot] Building tools without building firmware
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On Tuesday 11 November 2008 15:15:09 Matt Sealey wrote:
> We have a need to build and package at the very least 'mkimage' for SuSE
> 11.1 and since we have multiple board targets in mind (MPC8641D, MPC8610,
> MPC5121e) it does not make any sense to pick any in particular or build the
> entire u-boot.bin just for a few kilobytes we need to prep kernels and
> initrd images.
>
> Is it possible to simply build the tools/ directory (a make target that
> works would be great) without building a firmware from BLAH_config first?

you can see the method we use in Gentoo here:
http://sources.gentoo.org/dev-embedded/u-boot-tools/

but i'd agree that i wish it were easier to just build the helper utilities.  
and if they werent so tightly intertwined with the rest of the u-boot code ... 
atm you cant build mkimage on a non-Linux system due to the libfdt stuff.
-mike