RFR: 8165440: Add zero support for x86_64-linux-gnux32 target

[John Paul Adrian Glaubitz]

You’re right, sorry. I haven’t been around OpenJDK for some weeks and forgot about posting to build-dev when posting.

I will push in around 2-3 hours, currently on a train.

Adrian

> On Sep 5, 2018, at 9:05 AM, Magnus Ihse Bursie <magnus.ihse.bursie at oracle.com> wrote:
> 
>> On 2018-09-04 23:29, David Holmes wrote:
>> Hi Adrian, 
>> 
>> All changes that touch the build system must be reviewed by build-dev - now cc'd. 
> This has been discussed at some length in build-dev. But I agree, it's good that also the actual RFR is cc:ed here.
> 
> The patch, unsurprisingly, LGTM.
> 
> /Magnus
> 
>> 
>> These changes seem reasonable, though I don't like adding changes in source code for such an obscure (and unsupported!) platform. 
>> 
>> David 
>> 
>>> On 5/09/2018 3:45 AM, John Paul Adrian Glaubitz wrote: 
>>> Hi! 
>>> 
>>> This rather small change adds build support for the x86_64-linux-gnux32 
>>> target. x32 is a variant of the x86_64 ABI with 64-bit registers and amd64 
>>> instruction set but 32-bit pointers [1]. 
>>> 
>>> One of the Linux distributions supporting x32 is Debian, see [2]. The 
>>> port is not official, but the large majority of packages build fine 
>>> and the toolchain is in good shape. Another distribution supporting 
>>> x32 is Gentoo. 
>>> 
>>> Please review the change in [3]. I have changed the original patch 
>>> a bit that Debian uses downstream to make the changes more consistent 
>>> and cleaner. 
>>> 
>>> Thanks, 
>>> Adrian 
>>> 
>>>> [1] https://en.wikipedia.org/wiki/X32_ABI 
>>>> [2] http://debian-x32.org/ 
>>>> [2] http://cr.openjdk.java.net/~glaubitz/8165440/webrev.00/ 
>>> 
>