linux-kernel - Re: [PATCH] kbuild: Disallow GCC 4.1.0 / 4.1.1

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Message-ID: <495E5CE0.9010800@oracle.com>
Date:	Fri, 02 Jan 2009 10:28:48 -0800
From:	Randy Dunlap <randy.dunlap@...cle.com>
To:	Sam Ravnborg <sam@...nborg.org>
CC:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Vegard Nossum <vegard@...nel.org>, Ingo Molnar <mingo@...e.hu>,
	David Miller <davem@...emloft.net>,
	Andrew Morton <akpm@...ux-foundation.org>, rdreier@...co.com,
	ian.campbell@...rix.com, jeremy.fitzhardinge@...rix.com,
	deller@....de, rusty@...tcorp.com.au, linux-parisc@...r.kernel.org,
	linux-kernel@...r.kernel.org, kyle@...artin.ca, randolph@...sq.org,
	dave@...uly1.hia.nrc.ca
Subject: Re: [PATCH] kbuild: Disallow GCC 4.1.0 / 4.1.1

Sam Ravnborg wrote:
> On Fri, Jan 02, 2009 at 10:04:27AM -0800, Linus Torvalds wrote:
>>
>> On Fri, 2 Jan 2009, Sam Ravnborg wrote:
>>> Bugger....
>>> Now I cannot do cross compile for: alpha, arm, m68k and sparc.
>>>
>>> Not that I actually try to run these beasts but just being able
>>> to do cross compile has served me well.
>> We _could_ make a "CONFIG_COMPILE_ONLY" check, but wouldn't it be even 
>> nicer to make sure the cross-compiles are something that might actually be 
>> expected to work?
>>
>> I realize that cross-tools tend to lag a bit - the pressure to maintain 
>> them tends to be much lower - but I was sure we had somebody who did a 
>> reasonable cross-compiler toolchain. Is gcc-4.1 really the most modern 
>> thing that is easily available?
> 
> Asked google and it found following page:
> 
>     http://www.kernel.org/pub/tools/crosstool/
> 
> Architecuter   OK?    gcc version
> --------------------------------- 
> alpha          No     gcc 4.0.2
> arm            Yes    gcc 3.4.5
> ia64           Yes    gcc 3.4.5
> m68k           Yes    gcc 3.4.5
> mips           Yes    gcc 3.4.5
> sh4            Yes    gcc 3.4.5
> sparc          Yes    gcc 3.4.5
> sparc64        Yes    gcc 3.4.5
> x86_64         Yes    gcc 3.4.5
> 
> 
> So from this list of tool chains we can continue to do cross builds
> of all except alpha.
> But the gcc version is getting ancient..
> 
> Why it shall be so hard to do cross build toolchains is above my
> imagination but then I also never looked at what it involes.
> 
> Added Vegard that maintain these pages.

I doubt that these are any more recent, but the filenames don't say:

http://userweb.kernel.org/~akpm/cross-compilers/


Yes, it is an ongoing problem.

-- 
~Randy
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