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

[Erik Joelsson]

Looks ok to me.

/Erik


On 2018-09-04 14:29, David Holmes wrote:
> Hi Adrian,
>
> All changes that touch the build system must be reviewed by build-dev 
> - now cc'd.
>
> 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/
>>