From: "Roger Pau Monné" <roger.pau@citrix.com>
To: Julien Grall <julien@xen.org>
Cc: <xen-devel@lists.xenproject.org>,
Julien Grall <jgrall@amazon.com>,
"Andrew Cooper" <andrew.cooper3@citrix.com>,
George Dunlap <george.dunlap@citrix.com>,
Ian Jackson <iwj@xenproject.org>, Jan Beulich <jbeulich@suse.com>,
"Stefano Stabellini" <sstabellini@kernel.org>,
Wei Liu <wl@xen.org>
Subject: Re: [PATCH for-4.15] xen: Bump the minimum version of GCC supported to 4.9 (5.1 on arm64)
Date: Sun, 7 Mar 2021 11:57:40 +0100 [thread overview]
Message-ID: <YESxpOByQ+7gXeI0@Air-de-Roger> (raw)
In-Reply-To: <20210306214148.27021-1-julien@xen.org>
On Sat, Mar 06, 2021 at 09:41:48PM +0000, Julien Grall wrote:
> From: Julien Grall <jgrall@amazon.com>
>
> Compilers older than 4.8 have known codegen issues which can lead to
> silent miscompilation:
>
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58145
>
> Furthermore, pre-4.9 GCC have known bugs (including things like
> internal compiler errors on Arm) which would require workaround (I
> haven't checked if we have any in Xen).
>
> The minimum version of GCC to build the hypervisor is now raised to 4.9.
The README entry doesn't differentiate between tools and hypervisor
GCC version, can the bug above also manifest in toolstack code?
I don't think it makes much sense to have diverging requirements for
tools vs hypervisor builds, but if the bug(s) can also manifest in
toolstack code we might want to add a GCC version check to
tools/configure.ac.
Thanks, Roger.
next prev parent reply other threads:[~2021-03-07 10:58 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-06 21:41 [PATCH for-4.15] xen: Bump the minimum version of GCC supported to 4.9 (5.1 on arm64) Julien Grall
2021-03-07 10:57 ` Roger Pau Monné [this message]
2021-03-07 12:37 ` Julien Grall
2021-03-08 8:09 ` Jan Beulich
2021-03-08 10:51 ` Julien Grall
2021-03-08 11:20 ` Jan Beulich
2021-03-08 20:22 ` Julien Grall
2021-03-09 11:20 ` Jan Beulich
2021-03-10 18:05 ` Julien Grall
2021-03-11 8:17 ` Jan Beulich
2021-03-11 9:31 ` Julien Grall
2021-03-11 11:43 ` Jan Beulich
2021-03-08 9:49 ` Ian Jackson
2021-03-10 20:48 ` Stefano Stabellini
[not found] <161507188317.11025.6744028462008264481@c667a6b167f6>
2021-03-07 13:00 ` Julien Grall
2021-03-09 0:59 ` Stefano Stabellini
2021-03-09 10:05 ` Julien Grall
2021-03-09 10:32 ` Roger Pau Monné
2021-03-09 11:11 ` Anthony PERARD
2021-03-09 22:24 ` Stefano Stabellini
2021-03-10 7:52 ` Roger Pau Monné
2021-03-10 10:24 ` Zheng, Fam
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