Supported platforms

[Aleksei Voitylov]

Hi David,

Speaking about the arm/ port, BellSoft has been releasing JCK-verified 
binaries (as provided under the OpenJDK license) from the arm/ port for 
the Raspberry Pi for JDK 9 [1] for a while and recently released one for 
JDK 10 [2], including OpenJFX and Minimal VM support. On Raspberry Pi 2 
(ARMv7) and Raspberry Pi 3 (ARMv8 chip running Raspbian) the binaries 
produced from this port are passing all the required testing, including 
the new features recently open-sourced by Oracle (such as AppCDS). As 
far as JDK 11 is concerned, we are keeping track of the changes, 
recently fixed a couple of build issues that slipped in [3, 4], are 
working on Minimal Value Types support and, from what I can tell, will 
need to look into JFR and Nest-Based Access Control. Please let us know 
if we missed anything and we need to prepare for some other new features 
for porting.

The intent is to keep the arm/ port in good shape and provide 
well-tested binaries for the Raspberry Pi.

I believed Oracle was aware about BellSoft producing binaries from this 
port [5], [6]. Based on twitter, it seems like at least some engineers 
at Redhat and SAP are aware about it. Let me know if there is anything 
else we need to do to spread the word about it with Oracle engineering. 
For now, Boris (cced) is the engineer at BellSoft working on supporting 
the arm/ port for the Raspberry Pi. Other than that, I really wonder 
what "stepping up to take ownership of a port" means when it's upstream, 
and there is some procedure we need to follow.

Thanks,

-Aleksei

[1] https://bell-sw.com/java-for-raspberry-pi-9.0.4.html
[2] https://bell-sw.com/java-for-raspberry-pi.html
[3] https://bugs.openjdk.java.net/browse/JDK-8200628
[4] https://bugs.openjdk.java.net/browse/JDK-8198949
[5] https://twitter.com/java/status/981239157874941955
[6] https://twitter.com/DonaldOJDK/status/981874485979746304


> We are in a situation where previously "supported" platforms (by Oracle)
> are no longer supported as, AFAIK, no one has stepped up to take
> ownership of said platforms - which is a requirement for getting a new
> port accepted into mainline. Without such ownership the code may not
> only bit-rot, it may in time be stripped out completely. Any interested
> parties would then need to look at (re)forming a port project for that
> platform to keep it going in OpenJDK (or of course they are free to take
> it elsewhere).
>
> Cheers,
> David
>

On 09/04/2018 18:35, White, Derek wrote:
> Hi Magnus,
>
>> -----Original Message-----
>> Date: Mon, 9 Apr 2018 09:55:09 +0200
>> From: Magnus Ihse Bursie <magnus.ihse.bursie at oracle.com>
>> To: Simon Nash <simon at cjnash.com>, bren at juanantonio.info
>> Cc: build-dev at openjdk.java.net, hotspot-dev developers
>> 	<hotspot-dev at openjdk.java.net>
>> Subject: Re: Supported platforms
>> Message-ID: <4b1f262d-b9d2-6844-e453-dd53b42b2d74 at oracle.com>
>> Content-Type: text/plain; charset=utf-8; format=flowed
>>
>> Simon,
>>
>> On 2018-04-08 16:30, Simon Nash wrote:
>>> On 05/04/2018 02:26, bren at juanantonio.info wrote:
>>>> Many thanks with the link about the Platforms supported:
>>>>
>> http://www.oracle.com/technetwork/java/javase/documentation/jdk10cert
>>>> config-4417031.html
>>>>
>>> This appears to be a list of the platforms that are supported
>>> (certified) by
>>> Oracle.? Where can I find the list of platforms that are supported by
>>> OpenJDK?? For example, what about the following platforms that don't
>>> appear on the Oracle list:
>>>
>>> Windows x86
>>> Linux x86
>>> aarch32 (ARMv7 32-bit)
>>> aarch64 (ARMv8 64-bit)
>>>
>>> Are all these supported for OpenJDK 9, 10 and 11?
>> There is actually no such thing as a "supported OpenJDK platform". While I
>> hope things may change in the future, OpenJDK as an organization does not
>> publicize any list of "supported" platforms. Oracle publishes a list of
>> platforms they support, and I presume that Red Hat and SAP and others do
>> the same, but the OpenJDK project itself does not.
>>
>> With that said, platforms which were previously supported by Oracle (like
>> the one's you mentioned) tend to still work more-or-less well, but they
>> receive no or little testing, and is prone to bit rot.
>>
>> /Magnus
> Surely you meant to say "receive no or little testing BY ORACLE, and ORACLE IS NOT RESPONSIBLE FOR ANY bit rot."
>
> I haven't found a definitive list of supported OpenJDK platforms, but have an ad-hoc list of publicly available binaries:
> - Major linux distros are supporting x64 and aarch64 (arm64), and probably other platforms.
> - AdoptOpenJDK provides tested builds for most 64-bit platforms (x64, aarch64, ppc64, s390).
>       - https://adoptopenjdk.net/releases.html
> - Bellsoft provides support for 32-bit ARMv7.
>      - https://bell-sw.com/products.html
> - Azul provides 32-bit x86 and ARMv7 binaries as well as 64-bit x86 and aarch64.
>      - https://www.azul.com/downloads/zulu/
>
> I'm sure there are several others I've missed - sorry!
>   - Derek