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

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Message-ID: <20090102225203.GK28946@ZenIV.linux.org.uk>
Date:	Fri, 2 Jan 2009 22:52:03 +0000
From:	Al Viro <viro@...IV.linux.org.uk>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Sam Ravnborg <sam@...nborg.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

On Fri, Jan 02, 2009 at 08:14:58PM +0100, Andi Kleen wrote:
> Al Viro <viro@...IV.linux.org.uk> writes:
> >
> > FWIW, I'm using 4.3 on all targets at the moment.  See
> > git://git.kernel.org/pub/scm/linux/kernel/git/viro/toolchain.git/
> > for fedora-based variant of that sucker.  And yes, it does include
> > cross-to-sparc; all but sh/sh64, in fact (sh had serious compiler
> > breakage around 4.3.0 and backporting from -HEAD was far beyond
> > what I considered reasonable at that point).
> 
> The full opensuse distribution also has a couple of spec files for
> generating cross compilers from recent versions. These are for
> icecream, but can be relatively easily adapted (or the binaries
> reused)
> 
> In general I don't think building cross compilers is as hard
> as it used to be, so it can be reasonably done without any support
> scripts too.

*snort*

Well, the only support script here is "call rpmbuild with the right
arguments" (and kmk, which is about running kernel cross-build
conveniently and has nothing to do with building cross-toolchain
itself).

I'll need to update that to more current gcc anyway (and see if that
takes care of sh/sh64), so if you can dig those .spec out... throw
them my way and I'll add them to repository.

How well do they handle the targets for which you have no glibc-dev
binary rpms, BTW?  I needed headers for ia64 and ppc64; both fortunately
are among the generally supported targets...
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