linux-kernel - Re: Makefile for kernel modules

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Message-ID: <20101004023207.GB5189@cr0.nay.redhat.com>
Date:	Mon, 4 Oct 2010 10:32:07 +0800
From:	Américo Wang <xiyou.wangcong@...il.com>
To:	Dragoslav Zaric <zaricdragoslav@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Makefile for kernel modules

On Sat, Oct 02, 2010 at 09:20:16PM +0400, Dragoslav Zaric wrote:
...
>
>But if I have two kernel modules source files, for example, start.c
>and stop.c, my Makefile will look like this:
>---------------------------------------------------------------------------
>obj-m += startstop.o
>startstop-objs := start.o stop.o

startstop-objs should be startstop-y

>
>all:
>	make -C /lib/modules/$(shell uname -r)/build M=$(PWD) modules
>clean:
>	make -C /lib/modules/$(shell uname -r)/build M=$(PWD) clean
>---------------------------------------------------------------------------
>But this does not work on my machine, it runs without errors but does
>not produce startstop.ko file.
>Also, when I run make on my machine, first line that appears is:
>---------------------------------------------------------------------------
>make -C /lib/modules/2.6.33.7-rt29/build
>M=/home/maiev/work/modules/parts modules
>---------------------------------------------------------------------------
>
>So, does anybody know what are lines for manual kernel module
>compilation using probably gcc,
>without 'obj-m +=' or at least how Makefile should look for multiple
>kernel module source files ???
>

Please read Documentation/kbuild/modules.txt.

Thanks.
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