Re: [PATCH] Raise the minimum GCC version to 5.2

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On Tue, May 04, 2021 at 02:09:24PM +0200, Miguel Ojeda wrote:
> On Tue, May 4, 2021 at 11:22 AM Michal Suchánek <msuchanek@xxxxxxx> wrote:
> >
> > Except it makes answering the question "Is this bug we see on this
> > ancient system still present in upstream?" needlessly more difficult to
> > answer.
> 
> Can you please provide some details? If you are talking about testing
> a new kernel image in the ancient system "as-is", why wouldn't you
> build it in a newer system? If you are talking about  particular
> problems about bisecting (kernel, compiler) pairs etc., details would
> also be welcome.

Yes, bisecting comes to mind. If you need to switch the userspace as
well the bisection results are not that solid. You may not be even able
to bisect because the workload does not exist on a new system at all.
Crafting a minimal test case that can be forward-ported to a new system
is not always trivial - if you understood the problem to that extent you
might not even need to bisect it in the first place.

Thanks

Michal



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