jdk 8 building just jdk

Erik Joelsson erik.joelsson at oracle.com
Mon Aug 5 11:21:00 UTC 2013

On 2013-07-27 07:49, Alan Bateman wrote:
> On 26/07/2013 20:38, Mike Duigou wrote:
>> On Jul 26 2013, at 18:41 , Pete Brunet wrote:
>>> Am doing my first jdk8 build.  After reading through the build readme I
>>> didn't see any info on building just jdk and using an import lib.  I'm
>>> guessing this is no longer possible but checking...
>> It's probably possible but usually not necessary. Even on a modest 
>> system a full build takes only 20 minutes and an incremental rebuild 
>> is less than 3 minutes (even faster if you use sjavac or JDK_FILTER).
> I agree, it shouldn't really be necessary to do partial builds any 
> more (it was way too fragile in the past with the old build). That 
> said, the new build does have --with-import-* options to configure the 
> build to import some of the components from another JDK.
You can skip build of and import hotspot with 
--with-import-hotspot=/path/to/hotspot which can either point to a full 
jdk or the export dir from a hotspot build directory.

MSYS has limited support, but is not faster than cygwin in my 
experience. Last I tried, MSYS required a JOBS=1 build to not crash.


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