[patch] add zero support for x86_64-linux-gnux32 target

[Erik Joelsson]

Build changes look ok.

/Erik


On 2016-09-05 14:03, Matthias Klose wrote:
> The attached patch adds support for building zero for the x86_64-linux-gnux32
> target, having changes in the build system, hotspot and jdk.
>
>   - the build system currently only derives the target from
>     the cpu in PLATFORM_EXTRACT_VARS_FROM_CPU; that is not enough
>     for the new target, which only differs by the ending of the
>     triplet. However the $host macro should be available anywhere.
>
>   - the hotspot part just handles the new "cpu"
>
>   - GensrcX11Wrappers.gmk assumes that there is a black/white
>     decision about -m32/-m64. The patch works around it.  However
>     the real patch should be to get these flags from the build
>     system, and not hardcode itself.
>
>   - the sysctl system call is unsupported in the x32 kernel, and
>     just the include leads to a build error.  From my point of view
>     the header is not needed. I had successful builds on all other
>     targets without including it. If you want to keep the include,
>     then it should be guarded with
>     #if !(defined(_ILP32) && defined(__x86_64__))
>
> Matthias