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

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Message-Id: <200709051946.12096.vda.linux@googlemail.com>
Date:	Wed, 5 Sep 2007 19:46:11 +0100
From:	Denys Vlasenko <vda.linux@...glemail.com>
To:	Oleg Verych <olecom@...wer.upol.cz>
Cc:	sam@...nborg.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/3] build system: section garbage collection for vmlinux

On Wednesday 05 September 2007 16:53, Oleg Verych wrote:
> * Wed, 5 Sep 2007 14:43:21 +0100
> * User-Agent: KMail/1.9.1
> >
> > Build system: section garbage collection for vmlinux
> 
> Maybe this is just a test suit to get finish with `make XYZ static`?

They are vaguely connected in a sense that unused function which is
not marked static doesn't generate gcc warning, but will be discarded
by --gc-sections. "make XYZ static" also tends to find them - you make
function static, you recompile the file, and gcc informs you that
the function is not used at all!

This happened to me when I did aic7xxx patches.

You may yse --print-gc-sections to see the list of discarded sections.
--
vda
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