linux-kernel - Re: [RFC/PATCH 0/2] A simpler way to maintain custom defconfigs

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Message-ID: <21984.23085.125231.147499@quad.stoffel.home>
Date:	Fri, 28 Aug 2015 08:55:09 -0400
From:	"John Stoffel" <john@...ffel.org>
To:	Felipe Contreras <felipe.contreras@...il.com>
Cc:	linux-kernel@...r.kernel.org, linux-kbuild@...r.kernel.org,
	"Yann E. MORIN" <yann.morin.1998@...e.fr>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [RFC/PATCH 0/2] A simpler way to maintain custom defconfigs

Felipe> For several years I've used a trick to be able to maintain a simple defconfig
Felipe> that works across many versions, and requires little maintenance from my
Felipe> part:

Felipe> % cat arch/x86/configs/x86_64_defconfig ~/my-config > .config && make olddefconfig

Felipe> I'm sending a proposal to integrate it on the build system so that many people
Felipe> can do the same in a simple manner.

Felipe> The interesting part is how to generate this simplified defconfig. In a
Felipe> nutshell; you want to take your .config, remove everything that is the default
Felipe> in the Kconfig files (what savedefconfig does), but also removes anything that
Felipe> is in the default defconfig (e.g. x86_64_defconfig)

Felipe> I've been doing this by hand, but today I gave it a shot to automate this. The
Felipe> result is a bit crude, but it works.

Felipe> Thoughts?

I like this idea, it makes alot of sense to me, and looks like it will
simplify things for people.  

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