Re: [PATCH for-4.15] xen: Bump the minimum version of GCC supported to 4.9 (5.1 on arm64)

[Jan Beulich <jbeulich@xxxxxxxx>]

On 11.03.2021 10:31, Julien Grall wrote:
> On 11/03/2021 08:17, Jan Beulich wrote:
>> On 10.03.2021 19:05, Julien Grall wrote:
>>> On 09/03/2021 11:20, Jan Beulich wrote:
>>>> On 08.03.2021 21:22, Julien Grall wrote:
>>>>> On 08/03/2021 11:20, Jan Beulich wrote:
>>>>>> On 08.03.2021 11:51, Julien Grall wrote:
>>>>>>> On 08/03/2021 08:09, Jan Beulich wrote:
>>>>>>>> Additionally - partly related to your own reply regarding the CI
>>>>>>>> failures - imo there needs to be an analysis of what older distros
>>>>>>>> will no longer build (at all or by default).
>>>>>>>
>>>>>>> Per the CI, this would be Ubuntu Trusty (and older), Centos 7 (and 
>>>>>>> older)
>>>>>>>
>>>>>>> Do you have any other in mind?
>>>>>>
>>>>>> Our SLE12 (latest service pack is SP5 and still has a while to go
>>>>>> to at least reach LTSS state) comes with gcc 4.8 as the default
>>>>>> compiler.
>>>>>
>>>>> Thanks! That's good to know. Is it the old GCC Suse supports?
>>>>
>>>> Not sure I understand the question: The default compiler of this or
>>>> any distro is of course (expected to be) supported by the vendor
>>>> for the lifetime of the OS.
>>>
>>> Sorry for the wording. I was asking whether Suse also supports compiler
>>> older than GCC 4.8.
>>
>> Oh, I see. SLES11 has another year to go for LTSS to end, and it's 4.3
>> which is used there.
> 
> Thanks for the info! Are you planning to build Xen 4.15 there too?

If "you" is the company - there are no plans to provide 4.15 there. But
I do build Xen myself on such systems. That's how I'm noticing
compatibility issues like the one in grant table code where you don't
like the workaround.

Jan