RFR(T): 8233530: gcc 5.4 build warning -Wc++14-compat after JDK-8233359

[Kim Barrett]

> On Nov 6, 2019, at 8:21 AM, David Holmes <david.holmes at oracle.com> wrote:
> 
> On 6/11/2019 11:17 pm, Thomas Stüfe wrote:
>> Hi David,
>> sorry for that. I had marked this as trivial, understood your initial answer as valid Review and pushed this after getting a second review from Goetz.
>> But no problem, I can do a follow up patch. What are the remaining criticisms? Removal of the _GNUG_ define?
> 
> I'll let Kim decide whether it is worth following up on this.

Those #ifdefs look really odd, and this file might not be touched again for a while.
What’s one more time through the spin cycle? :)  Sigh.  I thought 8233359 was going to be easy.

BTW, the unofficial protocol for “trivial” involves explicit reviewer agreement (or suggestion).
(Maybe that part ought to be made explicit in https://wiki.openjdk.java.net/display/HotSpot/Pushing+a+HotSpot+change)