Message-ID: <52C474CB.8000300@gmail.com>
Date: Wed, 01 Jan 2014 15:04:27 -0500
From: Austin S Hemmelgarn <ahferroin7@gmail.com>
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To: Shea Levy <shea@shealevy.com>, linux-kernel@vger.kernel.org
Subject: Re: Build and Source Tree Requirements for Out-of-tree Modules
References: <52C43027.7010702@shealevy.com>
In-Reply-To: <52C43027.7010702@shealevy.com>
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On 01/01/2014 10:11 AM, Shea Levy wrote:
> Hi all,
> 
> I am a package maintainer for the kernel for the NixOS
> distribution. We support users building out-of-tree modules and
> other packages that might depend on the kernel source or build
> trees, but make modules_install copies the entire source and build
> trees (we build with $(O) set) to $(INSTALL_PATH), and those are
> some big paths to keep around. Is there any documentation on which
> of those files should actually be needed by any out-of-tree tools?
> For example I'm guessing the intermediate object files in the build
> tree or the .c files in the source tree are not necessary, but it
> would be nice if there were a definitive list of what could be
> removed to save space.
Running 'make modules_prepare' in a clean source tree should set up
the sources with everything needed for out of tree modules, it largely
amounts to the .config file, a few scripts, and a couple of specific
other files.

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