Re: Overhaul of Java auto-detection

[Rik]

On 12/10/2012 04:56 PM, Alexander Hansen wrote:
> 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
Is there a symlink at
/System/Library/Frameworks/JavaVM.framework/Versions/CurrentJDK that points
to 'A'?  It seems from the directory structure that you might have
Versions/A, Versions/B, ... with a symlink pointing to the currently chosen
one.  Otherwise, I can hardcode
"/System/Library/Frameworks/JavaVM.framework/Versions/A/Headers" as a
search path.

--Rik