linux-kernel - Re: [RFC] kbuild: make it possible to specify the module output dir

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Date:	Wed, 18 Feb 2015 16:05:48 +0100
From:	Michal Marek <mmarek@...e.cz>
To:	Kiran Raparthy <kumarsharma.r@...il.com>,
	linux-kernel@...r.kernel.org
CC:	Rom Lemarchand <romlem@...roid.com>, linux-kbuild@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Android Kernel Team <kernel-team@...roid.com>
Subject: Re: [RFC] kbuild: make it possible to specify the module output dir

On 2015-02-09 11:58, Kiran Raparthy wrote:
> From: Rom Lemarchand <romlem@...roid.com>
> 
> kbuild: make it possible to specify the module output dir
> 
> Make modinst_dir user-defined on the command line.
> 
> This allows to do things like:
> make MODLIB=output/ modinst_dir=. modules_install
> 
> to ensure all the .ko are in the output/ directory.

Please explain the use case and why it is needed. There are two
user-changeable variables used by modules_install:

INSTALL_MOD_PATH - prepended to /lib/modules/..., to allow installation
                   to a staging directory by non-root
INSTALL_MOD_DIR  - for out-of-tree modules; specifies the subdirectory
                   of /lib/modules/.../ to put the modules under
                   (default: "extra").

The hierarchy used in the source tree is reflected under
/lib/modules/.../extra, but that should not be an issue.

Michal
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