Re: java and Ubuntu 12

[Daniel J Sebald]

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