OpenJDK 7 Zero built for AArch64

[Andrew Hughes]

----- Original Message -----
> After three weeks build time, I have now OpenJDK 7 Zero packages available
> for
> AArch64.  The AArch64 support announced in IcedTea 2.3.10 turned out to be
> non-working, so I'm wondering who was able to get a working build for AArch64
> using this release.

I don't know of anyone having built it.  It was just a reference to the first of
Michal's patches (from your link below) being included.  We couldn't include the
second for the reason you already outlined.

> 
> Binary packages are available from
> 
>   deb http://people.canonical.com/~doko/tmp/openjdk-aarch64 ./
> 
> I did need the following three patches to get it building.
> 
>  - hotspot-fork.diff, found at
>    http://mail.openjdk.java.net/pipermail/porters-dev/2013-March/000469.html
> 
>    While the patch might not be generic enough it is needed for AArch64
>    because __NR_fork and __NR_execve are not defined, at least when using
>    glibc 2.17 and kernel headers 3.10.
> 
>  - jdk-zero-arch.diff, not found anywhere, sets ARCH_DATA_MODEL and
>    ZERO_ENDIANNESS correctly for AArch64.

Fedora also seems to have a (better) version of this. I don't know where this is from.

http://pkgs.fedoraproject.org/cgit/java-1.7.0-openjdk.git/tree/aarch64.patch

Did you actually need the jdk/make/jdk_generic_profile.sh changes as IcedTea's build
doesn't invoke this?

They are set in acinclude.m4:

AC_C_BIGENDIAN([ZERO_ENDIANNESS="big"], [ZERO_ENDIANNESS="little"])

We do probably need a section for aarch64.

> 
>  - aarch64-detection.diff, only needed for Debian/Ubuntu based builds.
>    Correctly using the host and not the build macros, and translating
>    arm64 to aarch64. Unfortunately Debian calls this port arm64 and
>    not aarch64.
> 

I can apply this easily enough.

> All three patches attached.
> 
> The build is a native build using gcj 4.8 from the 4.8 fsf branch for the
> stage1
> build.  No tests were run except using the stage1 build to build stage2.

That's a pretty good test in itself :)

> 
>   Matthias
> 

-- 
Andrew :)

Free Java Software Engineer
Red Hat, Inc. (http://www.redhat.com)

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