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From: Denys Vlasenko <vda.linux@googlemail.com>
Date: Tue, 7 Jun 2011 17:06:09 +0200
Message-ID: <BANLkTi=HBVt3_cD8Cw=0R5ZXGv-tYgHycQ@mail.gmail.com>
Subject: Re: Status of function-sections work?
To: Josh Triplett <josh@joshtriplett.org>
Cc: linux-kernel@vger.kernel.org
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On Tue, Jun 7, 2011 at 10:43 AM, Josh Triplett <josh@joshtriplett.org> wrote:
> On Tue, Jun 07, 2011 at 10:11:15AM +0200, Denys Vlasenko wrote:
>> On Monday 06 June 2011 03:15, Josh Triplett wrote:
>> > Hello,
>> >
>> > I found your work in 2010 on using function-sections and data-sections
>> > to eliminate unused code in the kernel. ?I'd like to make use of this
>> > work to try to build an extremely space-constrained kernel.
>> >
>> > It looks like a few of your patches made it into the kernel, but most of
>> > the linker script changes don't seem to have made it in. ?I wanted to
>> > find out the status of this work. ?Do you still have this working? ?Do
>> > you have versions of your patches for current Linux?
>>
>> parisc uses ^ in some identifiers. Therefore we need something like
>> [A-Za-z0-9_$^]* in linker script. This wasn't working with GNU ld -
>> ^ is not a valid char for pattern. Use of more general [!.]*
>> was also impossible - ! is not a valid char too.
>>
>> Therefore I asked binutils people to fix this (they agreed) and
>> decided to wait for a fixed binutils to be released.
>
> Makes sense. ?Thanks for the explanation and status.
>
> Do you know if the fix has gone into binutils, either in a release or
> the latest snapshot from version control? ?If not, does a patch exist?

Yes, latest released binutils has the fix.
-- 
vda
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