linux-kernel - Re: [PATCH] kconfig CROSS

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Message-Id: <20090907183801.379228BF3F@magilla.sf.frob.com>
Date:	Mon,  7 Sep 2009 11:38:01 -0700 (PDT)
From:	Roland McGrath <roland@...hat.com>
To:	Pavel Machek <pavel@....cz>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Sam Ravnborg <sam@...nborg.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] kconfig CROSS_COMPILE option

> Yes that would be very nice. Editing Makefile every time I
> crosscomppile for arm sucks.

The other trick I can recommend is to write a GNUmakefile containing:

ARCH=foo
CROSS_COMPILE=foo-linux-
include Makefile

(GNU make reads GNUmakefile in preference to Makefile.)
But this manual hackery is still not nearly as nice as the automagic way.

> But... do we need an option for subarch, too? And will Kconfig system
> handle that?

I'm not sure I follow exactly what your concern is.  I am mostly familiar
with doing x86 and powerpc builds.  For both of those, the kernel config
sets whether it's the 32-bit or 64-bit world.

Thanks,
Roland
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