linux-kernel - Re: [PATCH 0/4] Compile kernel with -fwhole-program --combine

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Date:	Fri, 25 Aug 2006 16:11:50 -0400
From:	Rob Landley <rob@...dley.net>
To:	David Woodhouse <dwmw2@...radead.org>
Cc:	linux-kernel@...r.kernel.org, linux-tiny@...enic.com,
	devel@...top.org
Subject: Re: [PATCH 0/4] Compile kernel with -fwhole-program --combine

On Thursday 24 August 2006 11:24 am, David Woodhouse wrote:
> Using a combination of these two compiler options for building kernel
> code leads to some useful optimisation

BusyBox has been doing this for months now: "build at once" is one of our 
config options.  I'd like to point out that gcc eats needs several hundred 
megabytes of ram to do this and you have no useful progress indicator between 
starting and ending.  But the result is definitely smaller.

We also tell the linker "--sort-common --gc-sections" which may or may not 
apply here...

Rob
-- 
Never bet against the cheap plastic solution.
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