Re: Overhaul of Java auto-detection

[Alexander Hansen]

On 12/10/12 5:34 PM, Rik wrote:
> On 12/10/2012 03:42 PM, Ben Abbott wrote:
>>
>> On Dec 10, 2012, at 4:20 PM, Rik wrote:
>>
>>> 12/10/12
>>>
>>> All,
>>>
>>> I just pushed a changeset which significantly changes (improves?) the way
>>> Java is detected if JAVA_HOME has not been set
>>> (http://hg.savannah.gnu.org/hgweb/octave/rev/56239ff815a3). There are
>>> likely to be kinks which need working out and I particularly need
> feedback
>>> from Mac OS X systems. Despite all those caveats, I think this is a much
>>> better strategy for detection than having a laundry list of
> directories to
>>> check for each operating system and distribution.
>>>
>>> --Rik
>>
>> Hi Rik,
>>
>> Definitely broke builing on MacOS X.
>>
>> Prior to your change, the Java stuff was configured as ....
>>
>> Java home: /System/Library/Frameworks/JavaVM.framework/Home
>> Java arch:
> /System/Library/Frameworks/JavaVM.framework/Libraries/libjvm_compat.dylib
>> Java CPPFLAGS: -I/System/Library/Frameworks/JavaVM.framework/Home/include
>> Java libraries: -framework JavaVM
>>
>> "Java home" is a symbolic link.
>>
>> $ ls -l /System/Library/Frameworks/JavaVM.framework/Home
>> lrwxr-xr-x 1 root wheel 24 Oct 21 20:46
> /System/Library/Frameworks/JavaVM.framework/Home -> Versions/CurrentJDK/Home
>>
>> With your change, I get ....
>>
>> Java home:
> /System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home
>> Java JVM path:
>> Java CPPFLAGS:
>> Java libraries:
>>
>> $ ls -l /System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home
>> total 8
>> drwxr-xr-x 41 root wheel 1394 Oct 21 21:08 bin
>> lrwxr-xr-x 1 root wheel 3 Oct 21 20:46 bundle -> ../
>> drwxr-xr-x 42 root wheel 1428 Oct 21 21:08 lib
>> drwxr-xr-x 41 root wheel 1394 Oct 21 21:08 man
>>
>> Ben
> Ben,
> 
> Could you poke around in the directory
> 
> /System/Library/Java/JavaVirtualMachines/1.6.0.jdk
> 
> and let me know about the following.
> 
> The location of 'java', 'javac', and 'jar'.
> 
> The location of libjvm and its name.
> 
> The location of jni.h
> 
> From the top-level directory try
> 
> find . -name 'java'
> find . -name 'javac'
> find . -name 'jar'
> find . -name '*libjvm*'
> find . -name 'jni.h'
> 
> --Rik
> 
> 

On 10.7 and 10.8:

java, javac, and jar are all in
/System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home/bin

jni.h is
/System/Library/Frameworks/JavaVM.framework/Versions/A/Headers/jni.h

libjvm is
/System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Libraries/libjvm.dylib

However, for some folks on 10.8, we've seen Java installed in /Library
instead of /System/Library:

https://github.com/fink/fink/issues/42

-- 
Alexander Hansen, Ph.D.
Fink User Liaison
My package updates: http://finkakh.wordpress.com/