[PATCH 4/4 v2] fix build errors with gcc6

[Guido Trentalancia]

Hello Andrew !

On Mon, 16/05/2016 at 11.18 -0400, Andrew Hughes wrote:

[...]

> While I agree that is a suitable and unproblematic backport, my
> approach
> so far has been to continue building with the older C++ standard,
> which
> means explicitly requesting it on newer versions of GCC where the
> default
> has changed. That's what my fix, 8151841, did. You could potentially
> look
> at supporting C++11 in OpenJDK 9, but I don't think it's appropriate
> for
> earlier versions. Even if sufficient changes can be made to get
> OpenJDK
> to build and run (and there were a lot of failures when I looked), it
> results in changing the ABI of the resulting binaries. All in all, I
> think
> it's too risky to resolve in older JDKs in that way, and I'd prefer
> to
> just retain existing behaviour as much as possible.
> 
> It seems that you're still seeing breakage on 9 because the new
> HotSpot
> build system has gone in and regressed some of 8151841 (see [0]). I'm
> looking at fixing this now, and will also see about backporting
> 8151841
> to 8u.
> 
> [0] https://bugs.openjdk.java.net/browse/JDK-8156980


I recommend applying the patch that I submitted to the different lists.

I believe supporting the new standard is the way forward.

Unfortunately, at the moment I have no time to follow up the other
build issues with OpenJDK9, but I suggest to adopt the same approach,
i.e. patching the code and/or the build system to support the new
standard.

Regards,

Guido