Java 7 for Fedora 16

[Peter Robinson]

On Fri, Aug 26, 2011 at 3:18 PM, Andy Grimm <agrimm at gmail.com> wrote:
> On Wed, Aug 3, 2011 at 6:00 PM, Deepak Bhole <dbhole at redhat.com> wrote:
>> * Douglas Myers–Turnbull <dmyersturnbull at gmail.com> [2011-07-25 20:53]:
>>> > I was planning to do this myself .. glad you started it :) I can take
>>> > over the Feature and doing all the work if you're fine with it...
>>>
>>> Please do!
>>>
>>> The only work I've done (literally) is on the feature page, but feel
>>> free let me know if you need anything from me.
>>>
>>
>> Hi Douglas,
>>
>> Thank you once again for creating the page. I have started updating it
>> and will add docs and other links tomorrow:
>> https://fedoraproject.org/wiki/Features/Java7
>>
>> For anyone and everyone interested, a Java 7 build is now available in
>> the Fedora 16. I will build for rawhide in the coming days as well:
>> http://koji.fedoraproject.org/koji/buildinfo?buildID=257034
>>
>> Cheers,
>> Deepak
>
> After some discussion on #fedora-java over the past 24 hours, I was
> asked to continue the discussion here regarding the implications of
> openjdk 6 and 7 coexisting in F16.  Right now, java packages are being
> built for F16 using openjdk 7, and if they are built without
> "target=1.6", they will fail to load under openjdk 6.  (One simple
> example of this is xalan, see
> https://bugzilla.redhat.com/show_bug.cgi?id=733686 ).  Some possible
> solutions proposed over IRC:
>
> 1) Blacklist openjdk 7 from build roots for f16 -- this means that it
> doesn't get tested very well, though.
>
> 2) Ensure all java packages use target=1.6 -- there's no standard way
> to do this across ant, mvn, javac, etc. though.  You could check for
> 1.7 bytecode at the end of a build, but packages would still need to
> be individually fixed.
>
> 3) Drop openjdk 6 from F16 entirely
>
> It was also mentioned that Fedora is beginning to include some
> packages which build much more cleanly on openjdk 7 than they do on 6,
> so enforcing openjdk 6-only build roots might break some things.
>
> Other suggestions are welcome.  I don't have a strong opinion about
> this, just a strong interest in having a sane Java environment in F16.

I think that would have to go to FESCo for approval or at least a
decision, its a fairly major change to happen post alpha where all
major changes should have landed already and all major mass rebuilds
should have been done.

Peter