[m-rev.] for review: add a workaround for Mantis bug #492

[Julien Fischer]

On Thu, 16 Jan 2020, Peter Wang wrote:

> On Thu, 16 Jan 2020 22:27:33 +1100 (AEDT), Julien Fischer <jfischer at opturion.com> wrote:
>>
>>> The bug is supposed to be fixed but the fix didn't make it into
>>> gcc 9.2, so maybe limit the workaround to gcc 9.1 and gcc 9.2.
>>
>> Done.
>>
>>> I'll try verify a gcc snapshot tomorrow.
>>
>> Thanks.
>
> Well, the patch isn't on the gcc-9 branch (yet?) so maybe it won't make
> it to the gcc 9 series after all.

Ok, in that case I think we just go back to the original version of this
change and apply the workaround to any GCC 9.  If the patch eventually
makes it on to the gcc-9 branch we can restrict it to the relevant
versions in a 20.01 point release.

Julien.