linux-kernel - Re: [PATCH] kbuild: let object files depend on recordmcount instead of its sources

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Message-ID: <1318017625.4729.80.camel@gandalf.stny.rr.com>
Date:	Fri, 07 Oct 2011 16:00:25 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Uwe Kleine-König 
	<u.kleine-koenig@...gutronix.de>
Cc:	Michal Marek <mmarek@...e.cz>, linux-kernel@...r.kernel.org,
	linux-kbuild@...r.kernel.org
Subject: Re: [PATCH] kbuild: let object files depend on recordmcount instead
 of its sources

On Fri, 2011-10-07 at 21:47 +0200, Uwe Kleine-König wrote:

> I could reproduce the build failure Steve is seeing now (enabling
> CONFIG_FUNCTION_TRACER helps, stupid me). I think the problem is that
> with my change empty.o depends on recordmcount and in a way that I don't
> understand recordmcount depends on empty.o. I wonder if it's possible to
> get rid of the latter dependency?!

It may be possible but probably not worth it. When I stumbled on empty.o
I talked with some of the kbuild folks, and IIRC, it is pretty core to
the dependency structure. Changing it may break other things easily.

-- Steve


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