From mboxrd@z Thu Jan  1 00:00:00 1970
From: Steven Scholz <steven.scholz@imc-berlin.de>
Date: Mon, 25 Oct 2004 17:12:38 +0200
Subject: [U-Boot-Users] PATCH: Introducing CONFIG_BOARD_PRE_RESET
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To: u-boot@lists.denx.de

Hi Gerald,

>>Do you see any problems without #ifdef ?
> 
> The reason I suggested the #ifdef is because the actual code
> implementation is surrounded by the #ifdef so, if you don't have
> CONFIG_BOARD_PRE_RESET defined, you will have a declaration of
> board_pre_reset() but no code implementing it.

This is how it's done all over the U-Boot source code.
So I take it for some kind of "coding style" ... ;-)

Steven