linux-kernel - Re: [PATCH 1/7] Make section names compatible with -ffunction-sections -fdata-sections

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Message-ID: <20090112221103.GJ23848@one.firstfloor.org>
Date:	Mon, 12 Jan 2009 23:11:03 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Tim Abbott <tabbott@....EDU>, andi@...stfloor.org,
	jbarnold@....EDU, linux-kernel@...r.kernel.org,
	vda.linux@...glemail.com, andersk@....EDU, wdaher@....EDU,
	knikanth@...e.de
Subject: Re: [PATCH 1/7] Make section names compatible with -ffunction-sections -fdata-sections

> So we `make it possible to build the kernel > with "gcc
> -ffunction-sections -fdata-sections"'.  So what?  Where is the value in
> that?

The original reason was that it allows the linker to drop unused
functions automatically. That is a good thing by itself -- e.g.
if it was universal we could avoid a lot of #ifdefs.  And it
also turned out that standard kernel builds get smaller by it iirc.

-Andi

-- 
ak@...ux.intel.com -- Speaking for myself only.
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