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[Xen-devel] Re: c/s 14420 (gcc 3.4+ required)

To: "Keir Fraser" <keir@xxxxxxxxxxxxx>
Subject: [Xen-devel] Re: c/s 14420 (gcc 3.4+ required)
From: "Jan Beulich" <jbeulich@xxxxxxxxxx>
Date: Mon, 19 Mar 2007 12:36:31 +0000
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>>> Keir Fraser <keir@xxxxxxxxxxxxx> 19.03.07 10:51 >>>
>On 19/3/07 09:35, "Jan Beulich" <jbeulich@xxxxxxxxxx> wrote:
>> what are the exact issues that required this change? SLES9 being based on
>> gcc 3.3.3 makes it pretty undesirable for me/us to have this kind of a
>> requirement. Despite me certainly being able to compile newer gcc-s (I
>> actually have these around all the time), the mere fact to remember to pass
>> a CC= each time I want to build Xen is going to make this cumbersome.
>> Hence I'd like to understand the underlying issue(s), see whether they apply
>> to the 3.3.x versions we have in use (aside of SLES9 I also continue to have
>> one 9.0 system around that I use for regular building and testing).
>It's fine to build Xenolinux with older gcc versions. The new constraint is
>just for the hypervisor itself, plus the toolstack. The issue is that all
>gcc 3.3.x miscompile alignment attributes hidden inside typedefs, which we
>were having to work around. It's not a big issue (the workaround in this
>case is small), but gcc 3.4.0 has been available now for three years, and I
>wouldn't recommend anyone to run a distro as old as SLES9 as their dom0

I just scanned the tree and couldn't spot any such instance. Could you point
me to one?


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