linux-kernel - Re: [PATCH 0/11 v3] enable "make ARCH=x86"

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Date:	Sat, 10 Nov 2007 12:35:01 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Paul Mundt <lethal@...ux-sh.org>, Jeff Garzik <jeff@...zik.org>,
	Sam Ravnborg <sam@...nborg.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH 0/11 v3] enable "make ARCH=x86"

Paul Mundt wrote:
> Indeed, that's what I was intending on keeping around as a convention,
> and simply overloading SRCARCH for the sh64 case. i386/x86_64 potentially
> has the same issue though, and if the intent is to have a single ARCH for
> both of them, I don't see how that would possibly work without
> sacrificing randconfig.. unless the intended x86 convention is that one
> compiler will happily handle both i386 and x86_64 without any difficulty?

Well, that *is* the normal thing on x86.

HOWEVER, I think the right thing for allyesconfig, allmodconfig, 
randconfig, etc. is to be able to override specific variables.  Right 
now, one has to use indirection via a file, which is a bit clumsy; it 
would be better if one could do "make allyesconfig CONFIG_X86_64=y" or 
somesuch.

In fact, we should be able to get rid of ARCH entirely;  CONFIG_ options 
have the huge advantage that they're saved in a file, and you don't have 
to type them on every make run. The only option that I can't see us 
getting rid of easily is HOSTCC, since it is used before config is run, 
but probably something clever can be done there, too.

	-hpa
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