Re: java and Ubuntu 12

[Ben Abbott]

On Nov 26, 2012, at 2:50 PM, Daniel J Sebald wrote:

> On 11/26/2012 01:31 PM, Benjamin Abbott wrote:
>> On Nov 26, 2012, at 2:13 PM, Ben Abbott<address@hidden>  wrote:
>> 
>>> On Nov 26, 2012, at 1:02 PM, Alexander Hansen wrote:
>>> 
>>>> On 11/26/12 10:48 AM, Daniel J Sebald wrote:
>>>> 
>>>>> On 11/26/2012 11:09 AM, Ben Abbott wrote:
>>>>>> 
>>>>>> On Nov 26, 2012, at 11:29 AM, Michael D. Godfrey wrote:
>>>>>> 
>>>>>>> On 11/26/12 4:16 PM, Ben Abbott wrote:
>>>>>>>> OpenJDK Java 7 Runtime
>>>>>>> I think you need the devel package from:
>>>>>>> 
>>>>>>>    Debian, Ubuntu, /etc./
>>>>>>> 
>>>>>>> On the command line, type:
>>>>>>> 
>>>>>>>  *$* sudo apt-get install openjdk-7-jre
>>>>>>> 
>>>>>>> The |openjdk-7-jre| package contains just the Java Runtime
>>>>>>> Environment. If you want to develop Java programs then install the
>>>>>>> |openjdk-7-jdk| package.
>>>>>>> 
>>>>>>> These names do not quite match what you said, but something with
>>>>>>> -jdk or -devel is where the headers are.
>>>>>>> 
>>>>>>> Michael'
>>>>>> 
>>>>>> I already have all the openjdk-7 packages installed.
>>>>>> 
>>>>>> $ apt-cache pkgnames | grep jdk-7
>>>>>> openjdk-7-jre-headless
>>>>>> openjdk-7-source
>>>>>> openjdk-7-jre-zero
>>>>>> openjdk-7-demo
>>>>>> openjdk-7-dbg
>>>>>> openjdk-7-doc
>>>>>> openjdk-7-jdk
>>>>>> openjdk-7-jre
>>>>>> openjdk-7-jre-lib
>>>>>> 
>>>>>> $ apt-cache --installed pkgnames | grep jdk-7
>>>>>> openjdk-7-jre-headless
>>>>>> openjdk-7-source
>>>>>> openjdk-7-jre-zero
>>>>>> openjdk-7-demo
>>>>>> openjdk-7-dbg
>>>>>> openjdk-7-doc
>>>>>> openjdk-7-jdk
>>>>>> openjdk-7-jre
>>>>>> openjdk-7-jre-lib
>>>>>> 
>>>>>> Ben
>>>>> 
>>>>> Those are all runtime environment files.  The Octave java tools need the
>>>>> "development kit" or JDK part of things, i.e., the part that creates the
>>>>> byte code that can run within the JRE.  Look for the RPM (or whatever is
>>>>> the equivalent) with openjdk Development Kit.
>>>>> 
>>>>> Dan
>>>> 
>>>> I'm seeing "openjdk-7-jdk" in Ben's list, and searching the online file
>>>> database rather than my local machine, I found the following:
>>>> 
>>>> $ apt-file find jni.h
>>>> ...
>>>> openjdk-7-jdk: /usr/lib/jvm/java-7-openjdk-amd64/include/jni.h
>>>> 
>>>> So it's probably just a matter of setting paths appropriately.
>>> 
>>> I didn't know about apt-file.  That's a nice feature.
>>> 
>>>    $ apt-file find jni.h | grep jdk-7
>>>    openjdk-7-jdk: /usr/lib/jvm/java-7-openjdk-i386/include/jni.h
>>> 
>>> With ...
>>> 
>>>    export JAVA_CPPFLAGS=/usr/lib/jvm/java-7-openjdk-i386/include
>>>    export JAVA_HOME=/usr/lib/jvm/java-7-openjdk-i386/bin
>>> 
>>> My build still fails.  My Makefile contains ...
>>> 
>>>    JAR =
>>>    JAVA = /usr/bin/java
>>>    JAVAC =
>>>    JAVA_CPPFLAGS = -I/usr/lib/jvm/java-7-openjdk-i386/include
>>>    JAVA_LIBS =
>>> 
>>> Suggestions?
>> 
>> Forgot to mention, my build still fails with the same error.
>> 
>>>    dldfcn/__java__.h:25:17: fatal error: jni.h: No such file or directory
>>>    compilation terminated.
> 
> Is jni.h on your system somewhere?
> 
> The JAR and JAVAC were initially undefined for me.  (It was only after half 
> an hour of compiling that I realized those were necessary.)  After installing 
> the JDK development environment, running "configure" creates a proper JAR and 
> JAVAC definition.
> 
> Dan

Hmmm .... I have the Java development kit installed

        $ apt-cache --installed pkgnames | grep openjdk-7-jdk
        openjdk-7-jdk

It *should* include jni.h ...

        $ apt-file find jni.h | grep jdk-7
        openjdk-7-jdk: /usr/lib/jvm/java-7-openjdk-i386/include/jni.h

But the include directory does not exist.

        $ ls /usr/lib/jvm/java-7-openjdk-i386
        bin  docs  jre  man

I tried to locate jni.h using find, but nothing was returned.

        find /usr -name jni.h

Perhaps the openjdk-7-jdk package is broken (?).  So I tried ...

$ sudo apt-get install openjdk-7-jdk
[sudo] password for bpabbott: 
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following extra packages will be installed:
  libxt-dev
Suggested packages:
  libxt-doc openjdk-7-demo openjdk-7-source visualvm
The following NEW packages will be installed:
  libxt-dev openjdk-7-jdk
0 upgraded, 2 newly installed, 0 to remove and 0 not upgraded.
Need to get 17.1 MB of archives.
After this operation, 21.8 MB of additional disk space will be used.
Do you want to continue [Y/n]? 

Now the jni.h is where it belongs!

$ ls /usr/lib/jvm/java-7-openjdk-i386/include
classfile_constants.h  jawt.h  jawt_md.h  jdwpTransport.h  jni.h  jni_md.h  
jvmticmlr.h  jvmti.h  linux

I'll report back when my build completes.

Ben