Linking to JavaRuntimeSupport framework

[Mike Swingler]

On Jan 25, 2011, at 2:43 PM, Henri Gomez wrote:

> 2011/1/25 David Kocher <dkocher at cyberduck.ch>:
>> (Resending this to the list as it did not appear after 24h)
>> 
>> Looking at the binary build available from the openjdk-osx-build [1], the universal libjava.dylib is linking against /System/Library/Frameworks/JavaVM.framework/Versions/A/Frameworks/JavaRuntimeSupport.framework/Versions/A/JavaRuntimeSupport. Is this intended and if so why? The equivalent library from the i386 build does not.
>> 
>>> libjava.dylib:
>>>       @rpath/libjava.dylib (compatibility version 1.0.0, current version 1.0.0)
>>>       @rpath/libjvm.dylib (compatibility version 1.0.0, current version 1.0.0)
>>>       @rpath/libverify.dylib (compatibility version 1.0.0, current version 1.0.0)
>>>       /System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation (compatibility version 150.0.0, current version 550.42.0)
>>>       /System/Library/Frameworks/SystemConfiguration.framework/Versions/A/SystemConfiguration (compatibility version 1.0.0, current version 293.6.0)
>>>       /System/Library/Frameworks/JavaVM.framework/Versions/A/Frameworks/JavaRuntimeSupport.framework/Versions/A/JavaRuntimeSupport (compatibility version 1.0.0, current version 1.0.0)
>>>       /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 125.2.1)
> 
> I guess it because it's now build with Apple VM 1.6.0

Yes, this is intentional. JavaRuntimeSupport.framework is a special framework where we export API exclusively for the use of Java runtimes (like OpenJDK). Our proprietary Java SE 6 and J2SE 5.0 have also linked against it for almost three years, so it's known battle-tested code.

We will also be making more additions to the JavaRuntimeSupport.framework soon to support additional functionality we will be introducing to the OpenJDK builds.

Stay tuned,
Mike Swingler
Java Engineering
Apple Inc.