linux-kernel - Re: [PATCH 1/4] kbuild: introduce KBUILD_CONFIG; unexpose KCONFIG

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Message-ID: <4E734228.2080801@suse.cz>
Date:	Fri, 16 Sep 2011 14:33:44 +0200
From:	Michal Marek <mmarek@...e.cz>
To:	Arnaud Lacombe <lacombar@...il.com>
Cc:	linux-kernel@...r.kernel.org, linux-kbuild@...r.kernel.org
Subject: Re: [PATCH 1/4] kbuild: introduce KBUILD_CONFIG; unexpose KCONFIG_CONFIG

On 16.9.2011 14:31, Michal Marek wrote:
> On 16.8.2011 07:34, Arnaud Lacombe wrote:
>> Refine the Kbuild interface to expose it's own variable to architecture
>> Makefile's and prepare Kconfig environment prior to any %config invocation.
>>
>> Signed-off-by: Arnaud Lacombe <lacombar@...il.com>
>> ---
>>  Makefile                                |    8 ++++++--
>>  arch/arm/boot/compressed/Makefile       |    2 +-
>>  arch/unicore32/boot/compressed/Makefile |    2 +-
>>  scripts/kconfig/Makefile                |    3 +++
>>  4 files changed, 11 insertions(+), 4 deletions(-)
>>
>> diff --git a/Makefile b/Makefile
>> index b4ca4e1..26798a4 100644
>> --- a/Makefile
>> +++ b/Makefile
> [...]
>> +# Prepare Kconfig environment
>> +KCONFIG_CONFIG    = $(KBUILD_CONFIG)
>> +export KCONFIG_CONFIG
> 
> IMO we should preserve the semantics of KCONFIG_CONFIG as much as
> possible. make KCONFIG_CONFIG=blah works, but setting it in the
> environment does not, because the '=' assignment take precendence.

Also, please mention KBUILD_CONFIG variable in
Documentation/kbuild/kconfig.txt. Or maybe
Documentation/kbuild/kbuild.txt, I'm not sure what is the best fit now.

Michal
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