linux-kernel - Re: diet-kconfig: a script to trim unneeded kconfigs

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Message-ID: <48D79FFD.1060102@cateee.net>
Date:	Mon, 22 Sep 2008 15:39:09 +0200
From:	"Giacomo A. Catenazzi" <cate@...eee.net>
To:	Takashi Iwai <tiwai@...e.de>
CC:	Chris Li <lkml@...isli.org>,
	Mauro Carvalho Chehab <mchehab@...radead.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	linux-kernel@...r.kernel.org
Subject: Re: diet-kconfig: a script to trim unneeded kconfigs

Takashi Iwai wrote:
> At Fri, 19 Sep 2008 16:55:51 -0700,
> Chris Li wrote:
> 
>> I avoid arch/ and firmware/ because it is nasty. I figure module in
>> arch/ is small enough I don't mind building it. And the firmware directory,
>> if I don't build the module loads it. Those firmware will automatically skipped
>> any way.
> 
> Agreed.
> 
>> The little tricky part is some thing like this:
>> ========================
>> ifeq ($(CONFIG_BLK_DEV_CMD640), m)
>>         obj-m += cmd640.o
>> endif
>> ========================
>> Internally it get convert it into:
>> "obj-$(CONFIG_BLK_DEV_CMD640) += cmd640.o"

Are you sure?
I.e. if you set CONFIG_BLK_DEV_CMD640=y, you see that
the two constructs gives different results.

If the makefile author did such complex construct, I
really think there is a reason ;-)

ciao
	cate


> 
> This should be fixed in Makefile.
> Care to submit a patch?
> 
> 
> Takashi
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