linux-kernel - Re: [PATCH v2 0/4] kconfig: store default ARCH in .config

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Message-ID: <CAMuHMdXKyTJZM9fwcCZ+-vCX3SZ9JuhPiNNAhyu=vrZuOjsw8w@mail.gmail.com>
Date:	Mon, 1 Sep 2014 09:24:45 +0200
From:	Geert Uytterhoeven <geert@...ux-m68k.org>
To:	Konstantin Khlebnikov <koct9i@...il.com>
Cc:	Michal Marek <mmarek@...e.cz>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	linux-kbuild <linux-kbuild@...r.kernel.org>,
	Paul Bolle <pebolle@...cali.nl>
Subject: Re: [PATCH v2 0/4] kconfig: store default ARCH in .config

Hi Konstantin,

On Mon, Sep 1, 2014 at 9:16 AM, Konstantin Khlebnikov <koct9i@...il.com> wrote:
> This is second attempt of fixing target archecture amnesia.
> v1 patch: http://lkml.kernel.org/r/20140706080234.19520.96704.stgit@zurg
>
> First version saved ARCH as CONFIG_DEFAULT_ARCH and used it as defult ARCH.
>
> This version changes semantic of Kconfig option env="...", now it acts more
> like the user input, except that the value comes from the environment.
> Variable from environment overrides all defaults and value from config file.
> If environment variable is not defined this option has no effect.
>
> So, now ARCH is saved as CONFIG_ARCH.
>
> Also this patchset links CONFIG_CROSS_COMPILE and CROSS_COMPILE in the same way.
> Changing it in command line/environment also updates value in the config file.

Thanks, I haven't tried this yet, but it looks promising!

For the record, right now I use a GNUmakefile (which takes precedence over
the Makefile) in the build directory containing e.g.

MAKEARGS = ARCH=arm CROSS_COMPILE=arm-unknown-linux-gnueabi-

MAKEFLAGS += --no-print-directory

.PHONY: all $(MAKECMDGOALS)

all := $(filter-out all Makefile,$(MAKECMDGOALS))

all:
        $(MAKE) $(MAKEARGS) $(all) -f Makefile

Makefile:;

$(all) %/: all
        @:

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds
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