linux-kernel - Re: kconfig: tristate choice with depender choice

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Message-ID: <CACqU3MU6j0ed6C9QDfzuoH+2a-2hww2wrCsQXW-kUfK37iansQ@mail.gmail.com>
Date:	Thu, 9 Feb 2012 00:26:25 -0500
From:	Arnaud Lacombe <lacombar@...il.com>
To:	Atsushi Nemoto <anemo@....ocn.ne.jp>
Cc:	Michal Marek <mmarek@...e.cz>, Sam Ravnborg <sam@...nborg.org>,
	linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: kconfig: tristate choice with depender choice

Hi,

On Thu, Feb 9, 2012 at 12:08 AM, Arnaud Lacombe <lacombar@...il.com> wrote:
> Hi,
>
> On Mon, Feb 6, 2012 at 7:16 PM, Atsushi Nemoto <anemo@....ocn.ne.jp> wrote:
>> If a tristate choice has another choice dependers, kconfig produce
>> wrong value.
>>
>> Example:
>>
>> choice
>>        prompt "choice list AB"
>> config A
>>        tristate "a"
>> config B
>>        tristate "b"
>> endchoice
>> choice
>>        prompt "choice list CD"
>>        depends on A
>> config C
>>        bool "c"
>> config D
>>        bool "d"
>> endchoice
>>
>> kconfig outputs CONFIG_A=m from defconfig with CONFIG_A=y.
>>
>> This happens if the choice list CD depends on A.
>> Also, if defconfig contains CONFIG_A=y and "# CONFIG_B is not set",
>> output is correct.
>>
> confirmed.
>
actually, not that much. Your reduced testcase is missing a MODULES
symbol to have modules enabled and have them show up in the final
`.config'. If you add:

config MODULES
  boolean
  default y

then you end up with CONFIG_A=m in the `.config'.

Now, I may have missed something.

Do you have a situation where a MODULES symbol is present, enabled,
but CONFIG_A=y still appear from CONFIG_A=m in the defconfig ?

Thanks,
 - Arnaud

>> I found commit a64b44ea ("kconfig: fix tristate choice with minimal
>> config"), but this problem still exists on v3.3-rc1.  More fix is
>> needed for choice with dependers?
>>
> it would seem so.
>
>  - Arnaud
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