linux-kernel - Re: [PATCH] kconfig: use $K64BIT to set 64BIT with all*config targets

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Date:	Thu, 15 Nov 2007 19:44:12 -0800
From:	Randy Dunlap <randy.dunlap@...cle.com>
To:	Roman Zippel <zippel@...ux-m68k.org>
Cc:	Sam Ravnborg <sam@...nborg.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] kconfig: use $K64BIT to set 64BIT with all*config
 targets

On Fri, 16 Nov 2007 02:28:09 +0100 (CET) Roman Zippel wrote:

> Hi,
> 
> On Thu, 15 Nov 2007, Sam Ravnborg wrote:
> 
> > You suggest just to check ARCH value and not apply your patch. This was
> > not my initial understanding as was hopefully obvious from my reply.
> 
> This patch only adds some extra features.
> 
> > If user did NOT specify ARCH we should use the kernel configuration - which
> > your solution fail to do.
> 
> To make this easy I attached the patch which reverts the problematic 
> changes and then you only need this simple change to force the 64BIT value 
> for ARCH={i386,x86_64}, otherwise it's set by the user:

Roman,

This all began (AFAIK) because some of us want to continue to be
able to specify ARCH={i386,x86_64} on the (make) command line --
not by using a .config file.  Taking away ARCH= on the command line
is a regression (in some minds, at least), so Sam provided that
capability.  Is that capability still present after this patch?

Thanks.


> bye, Roman
> 
> Signed-off-by: Roman Zippel <zippel@...ux-m68k.org>
> 
> ---
>  Makefile         |    3 ++-
>  arch/x86/Kconfig |    4 ++--
>  2 files changed, 4 insertions(+), 3 deletions(-)
> 
> Index: linux-2.6/Makefile
> ===================================================================
> --- linux-2.6.orig/Makefile
> +++ linux-2.6/Makefile
> @@ -165,7 +165,8 @@ export srctree objtree VPATH TOPDIR
>  # then ARCH is assigned, getting whatever value it gets normally, and 
>  # SUBARCH is subsequently ignored.
>  
> -SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
> +SUBARCH := $(shell uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ \
> +				  -e s/sun4u/sparc64/ \
>  				  -e s/arm.*/arm/ -e s/sa110/arm/ \
>  				  -e s/s390x/s390/ -e s/parisc64/parisc/ \
>  				  -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
> Index: linux-2.6/arch/x86/Kconfig
> ===================================================================
> --- linux-2.6.orig/arch/x86/Kconfig
> +++ linux-2.6/arch/x86/Kconfig
> @@ -3,8 +3,8 @@ mainmenu "Linux Kernel Configuration for
>  
>  # Select 32 or 64 bit
>  config 64BIT
> -	bool "64-bit kernel"
> -	default n
> +	bool "64-bit kernel" if ARCH="x86"
> +	default ARCH="x86_64"
>  	help
>  	  Say yes to build a 64-bit kernel - formerly known as x86_64
>  	  Say no to build a 32-bit kernel - formerly known as i386


---
~Randy
-
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