Building OpenJDK that matches OracleJDK update

Seán Coffey sean.coffey at
Mon May 18 19:01:48 UTC 2015

8u45 was a Critical Patch Update (CPU) release and such releases are not 
worked via the OpenJDK forests. You won't be able to build the 
equivalent of Oracle JDK from OpenJDK sources given that the Oracle JDK 
contains extra features like plugin and installer bundles.

The Oracle JDK is built on top of the OpenJDK sources. The tags in each 
repo indicate the sources which they were built from. The best scenario 
for you might be to update your repos to the tag level corresponding to 
the Oracle JDK of which you wish to reach parity with. For 8u45, the GA 
build number was b14 - i.e. tag jdk8u45-b14


On 18/05/2015 17:48, Brian Toal wrote:
> I'm trying to figure out how to build the OpenJDK so that it's at parity
> with the OracleJDK version.
> For example I want to build OpenJDK that is the equivalent of 8u45.
> Appreciate if someone could point me into the correct direction to any
> literature that explains how this is done.
> I've see it's possible to clone 8u40, but not 8u45
> hg clone jdk8u40
> as I get 404's when trying to clone.

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