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From Geir Magnusson Jr <g...@pobox.com>
Subject Re: [classlib] moving to 1.5 for real - discuss
Date Thu, 08 Jun 2006 12:31:10 GMT


Tim Ellison wrote:
> Geir Magnusson Jr wrote:
>> I'm +1 except I'd like to see us get to the point where we can
>>
>> - produce a full snapshot of classlib + VM (using DRLVM or JCHEVM or
>> whatever)
> 
> Absolutely, so how close are we to doing that?

Trying to wack the drlvm build into shape...

> 
>> - understand the timing of getting said VMs far enough that code will
>> continue to run
> 
> I hope it will not be too much work for said VMs to grok the new class
> file format, without doing all the TI, instrument, reflection, ... stuff.
> 
> Can people in the know tell me if said VMs can grok LDC CONSTANT_class,
> Synthetic access specifiers, etc?  If so we can run what we have got
> built with the 1.5 compiler target.
> 
>> While I'm stunningly grateful for the support IBM is providing with J9,
>> and am looking forward to continuing support being very valuable and
>> useful for us, we need to get the point of basic self-reliance wrt VM,
>> and I'd at least like to understand what the 1.5 implications are, and
>> the timelines for doing it.
> 
> Understood -- and me too.  Time line is important since doing things
> like concurrent and annotation will depend upon further VM support.
> 
> Regards,
> Tim
> 
>> Tim Ellison wrote:
>>> Thanks to many stellar contributions all round we are pretty much
>>> exhausting the work we can do with the temporary solution we adopted of
>>> source=1.5 target=jsr14|1.4 compiler flags.
>>>
>>> How do you feel about moving to 1.5 for real?  It would be simple to
>>> change the Java compiler build options to generate 1.5 class files.
>>>
>>> AIUI there is at least some 1.5 awareness in DRLVM and JCHEVM (and
>>> SableVM?) which would allow the current functionality to work, and IBM
>>> can provide a 1.5 version of the IBM VME to run on.
>>>
>>> Thoughts?
>>>
>>> Tim
>>>
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> 

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