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

David Holmes david.holmes at oracle.com
Tue Sep 4 21:29:06 UTC 2018

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.


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/

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