linux-kernel - Re: [PATCH 0/3] build system: section garbage collection for vmlinux

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Date:	Wed, 5 Sep 2007 21:27:19 +0200
From:	Adrian Bunk <bunk@...nel.org>
To:	Denys Vlasenko <vda.linux@...glemail.com>
Cc:	sam@...nborg.org, kai@...maschewski.name,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/3] build system: section garbage collection for
	vmlinux

On Wed, Sep 05, 2007 at 02:43:21PM +0100, Denys Vlasenko wrote:

> Build system: section garbage collection for vmlinux
> 
> Newer gcc and binutils can do dead code and data removal
> at link time. It is achieved using combination of
> -ffunction-sections -fdata-sections options for gcc and
> --gc-sections for ld.
>...

In the long term I'd like us to be able to compile the whole (or at 
least most of) the kernel with one "-combine -fwhole-program" gcc call 
which should bring the same positive effect plus enables gcc to do 
additional optimizations.

That's meant as a remark, not against your patch (which is for a lower 
hanging fruit).

> vda

cu
Adrian

-- 

       "Is there not promise of rain?" Ling Tan asked suddenly out
        of the darkness. There had been need of rain for many days.
       "Only a promise," Lao Er said.
                                       Pearl S. Buck - Dragon Seed

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