This fixes the problem.

Thanks everybody,

Fabrice

2017-10-14 10:05 GMT+02:00 Paul Eggert <eggert@cs.ucla.edu>:

> Eli Zaretskii wrote:
>
>> Does GCC assume that each struct starts at a 16-byte boundary?
>>
>
> No, only structs needing such an alignment, as is the case here.
>
> Fabrice, I installed the attached patch into the emacs-26 branch; would
> you please give it a try? Thanks.
>