Boot JDK used with jdk7 builds

Joe Darcy joe.darcy at
Fri Jun 3 16:13:57 UTC 2011

Phil Race wrote:
> Well .. we do not distribute binaries of 6-open so that's a bit of a 
> stumbling block.
> Plus 6-open is relatively new in the great scheme of things and is 
> more of a 6/7 hybrid.

The OpenJDK 6 project has publicly existed for around three and a half 
years and IcedTea6 [1] and OpenJDK 6 binaries [2] have been able to pass 
the JCK 6 conformance suite for nearly three years.

For my own JDK 7 development, I use OpenJDK 6/IcedTea 6 as the boot JDK.



> -phil.
> On 6/3/2011 9:02 AM, Dr Andrew John Hughes wrote:
>> On 08:57 Fri 03 Jun     , Kelly O'Hair wrote:
>>> The documented Boot JDK to be used when building JDK7 repositories 
>>> is JDK6 Update 18, as listed here
>>> However, as many people know, JDK releases newer than JDK6u18 should 
>>> always work, and some older ones can work too.
>>> Variations in build dependencies can sometimes create unwanted 
>>> differences between builds by different developers
>>> or build systems, so our tendency is to minimize these variations, 
>>> but by doing so, we run a risk that we don't
>>> see what does not work.
>>> If you have any incidents where particular JDKs can or cannot be 
>>> used as the Boot JDK for JDK7, please let us know.
>>> -kto
>> And OpenJDK6 works.  Is there any reason this is not recommended 
>> rather than a proprietary product?

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