[Cake] gcc 7.3.1 issue on arch

[Jonathan Morton]

> On 29 Mar, 2018, at 9:13 pm, Toke Høiland-Jørgensen <toke at toke.dk> wrote:
> 
>> I've started seeing the same error on my PowerPC box, running Gentoo.
>> It seemed specific to that machine, but the GCC version may well be
>> relevant since Gentoo tends to stabilise new GCC versions earlier on
>> minority platforms.
> 
> Yeah, definitely only shows up in very new GCCs.

PPC is running gcc 7.3.0, fails.  Haven't tried the workaround yet.

E-450 (amd64) is running gcc 6.4.0, succeeds.

 - Jonathan Morton