View source for Building JamVM and GNU Classpath and Jikes (for Java support in webOS) with scratchbox2

<H3>''''NOTE : 06/01/2012 : JamVM works !!!''''</H3>

= Requirements =

First, follow the tutorial [[WebOS Internals PDK]] to set up the cross compilation environment.

Next install gcj needed for compiling Gnu Classpath
 sudo apt-get install gcj

= Compiling =

Create your working folder :
 cd /home/ubuntu
 mkdir java-project
 cd java-project

Go in ARM mode in your ScratchBox 2 :
 sb2 -M /srv/preware/cross-compile/staging/mapping-armv7

== Create the folders ==

 mkdir -p /usr/local/bin/
 mkdir -p /usr/local/include/
 mkdir -p /usr/local/lib/
 mkdir -p /usr/local/share/

Quit ScratchBox 2 :
 exit

== Install Alsa needed by Gnu Classpath (optionnal - only for GUI mode with sound) ==

 cd /srv/preware/cross-compile/packages/media
 rm -Rf /srv/preware/cross-compile/packages/media/alsa-lib/build
 make -C alsa-lib ARCH=armv7 stage

== Install X needed by Gnu Classpath (optionnal - only for GUI mode) ==

 cd /srv/preware/cross-compile/packages/x
 rm -Rf /srv/preware/cross-compile/packages/x/libx11/build
 make -C libx11 ARCH=armv7 stage

== Install Escher needed by Gnu Classpath (optionnal - only for GUI mode) ==

Goal : bridge between Java and X server

[http://marcosroriz.wordpress.com/2010/06/14/gsoc-updates/ Escher useful information here].

Escher download page : http://sourceforge.net/projects/escher/files/escher/0.3/ and http://escher.sourceforge.net/

Ant download page : http://archive.apache.org/dist/ant/binaries/ and http://ant.apache.org/bindownload.cgi

 $ java -version
 java version "1.5.0"
 gij (GNU libgcj) version 4.5.2
 ...

 cd /home/ubuntu/java-project
 wget http://heanet.dl.sourceforge.net/project/escher/escher/0.3/escher-0.3.tar.gz
 wget http://archive.apache.org/dist/ant/binaries/apache-ant-1.7.1-bin.tar.gz
 tar xzvf escher-0.3.tar.gz
 tar xzvf apache-ant-1.7.1-bin.tar.gz
 export ANT_HOME=/home/ubuntu/java-project/apache-ant-1.7.1
 export PATH=$PATH:/home/ubuntu/java-project/apache-ant-1.7.1
 cd escher-0.3
 ant -f build.xml clean
 ant -f build.xml dist

Go in ARM mode in your ScratchBox 2 :
 sb2 -M /srv/preware/cross-compile/staging/mapping-armv7

 mkdir -p /usr/local/share/classpath/
 cp dist/escher-0.3.jar /usr/local/share/classpath/

Quit ScratchBox 2 :
 exit

If you do not want to compile escher-0.3.jar, you can download [http://sourceforge.net/projects/escher/files/escher/0.3/ HERE], ready to use.

== Install GNU Classpath ==

Goal : implement almost all of the classes from Java J2SE 1.4 and 5.0. 

GNU Classpath at Wikipedia : http://en.wikipedia.org/wiki/GNU_Classpath

GNU Classpath download page / website : http://www.gnu.org/software/classpath/downloads/downloads.html and http://www.gnu.org/software/classpath/

'''Note''': here, Gnu Classpath is only compiled for working in console mode. No support for sound or GUI in Java programs. 
The extra libs needed for these supports are detailed here : http://www.gnu.org/software/classpath/docs/hacking.html#SEC5 <BR>
For compiling with sound support, ALSA libs are needed. For compiling with GUI support, X libs are needed AND Escher or QT or GTK libs. <BR>
For low footprint memory, Escher is the best choice. [http://marcosroriz.wordpress.com/2010/06/14/gsoc-updates/ More useful information here]. <BR>

Compile :
 cd java-project
 wget ftp://ftp.gnu.org/gnu/classpath/classpath-0.98.tar.gz
 tar xzvf classpath-0.98.tar.gz
 cd classpath-0.98

Go in ARM mode in your ScratchBox 2 :
 sb2 -M /srv/preware/cross-compile/staging/mapping-armv7

Without GUI and sound support :
 ./configure --prefix=/usr/local --disable-examples --without-x --disable-gtk-peer --disable-gconf-peer --disable-plugin --disable-alsa --disable-dssi
 make
 make install
 cd ..

With GUI and sound support :
  LDFLAGS="-L/usr/local/lib -Wl,-rpath=/usr/local/lib" CPPFLAGS="-I/usr/local/include" ./configure --prefix=/usr/local --disable-examples --with-x --disable-gtk-peer --disable-gconf-peer --disable-plugin --enable-alsa --disable-dssi --with-escher=/usr/local/share/classpath
 make
 make install
 cd ..

''Note'' : Here, we have the option --disable-plugin because the webkit web browser in webOS can use this java plugin. But maybe, this Java plugin can be used with [http://www.fractalbrew.com/labs/prefox/ PreFox web browser].

== Install Zlib needed by JamVM ==

 cd /srv/preware/cross-compile/packages/common
 rm -Rf /srv/preware/cross-compile/packages/common/zlib/build
 make -C zlib ARCH=armv7 stage

== Install libffi needed by JamVM ==

'''Note : You have segmentation fault with JamVM if you not compile it with [http://en.wikipedia.org/wiki/Libffi libffi].
More info about this segmentation fault problem [http://sourceforge.net/projects/jamvm/forums/forum/256481/topic/4015576 in this thread].'''

libffi download page / website : http://sourceware.org/libffi/
 
 cd /home/ubuntu/java-project
 wget ftp://sourceware.org/pub/libffi/libffi-3.0.10.tar.gz
 tar xzvf libffi-3.0.10.tar.gz
 cd libffi-3.0.10
 ./configure --prefix=/usr/local --with-gcc-arch=armv7
 make
 make install
 cp include/ffi_common.h /usr/local/include
 cp arm-unknown-linux-gnueabi/include/ffi.h /usr/local/include
 cp src/arm/ffitarget.h /usr/local/include
 cd ..

== Install JamVM ==

Goal : can launch Java program 

JamVM at Wikipedia : http://en.wikipedia.org/wiki/JamVM

JamVM download page / website : http://sourceforge.net/projects/jamvm/files/jamvm/JamVM%201.5.4/ and http://jamvm.sourceforge.net/

 cd /home/ubuntu/java-project
 wget http://freefr.dl.sourceforge.net/project/jamvm/jamvm/JamVM%201.5.4/jamvm-1.5.4.tar.gz
 tar xzvf jamvm-1.5.4.tar.gz
 cd jamvm-1.5.4
 export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/lib
 export LD_RUN_LIBRARY_PATH=$LD_RUN_LIBRARY_PATH:/usr/local/lib
 LDFLAGS="-L/usr/local/lib -Wl,-rpath=/usr/local/lib" CPPFLAGS="-I/usr/local/include" ./configure --prefix=/usr/local --with-classpath-install-dir=/usr/local --enable-ffi
 make
 make install
 cd ..

'''Note 1 : do not use CFLAGS parameter to compile JamVM, there is maybe a problem (segmentation fault) with this parameter as you can find it [http://old.nabble.com/Segmentation-Fault-in-JamVM1.5.4-%2B-Classpath-0.98-td27370619.html in this post].'''

== Install Jikes ==

Goal : can compile Java program 

Jikes at Wikipedia : http://en.wikipedia.org/wiki/Jikes

download page / website : http://sourceforge.net/projects/jikes/files/ and http://jikes.sourceforge.net/

 wget http://freefr.dl.sourceforge.net/project/jikes/Jikes/1.22/jikes-1.22.tar.bz2
 bzip2 -d jikes-1.22.tar.bz2
 tar xvf jikes-1.22.tar
 cd jikes-1.22 
 ./configure --prefix=/usr/local
 make
 make install
 cd ..

Quit Scratch Box : 
exit

= Installing the files on your device =

 cd /srv/preware/cross-compile/staging/armv7/usr
 sudo chown -R root:root *
 sudo tar cvf local.tar *
 copy the local.tar on your webos device connected as USB key on your computer

On your computer connect at your webOS device 
 novacom -t open tty://

Move the files in the good folders :
 cd /media/internal
 mkdir java-project
 mv local.tar java-project
 cd java-project
 tar Pxvf local.tar
 chmod -R 755 *
 chown root:root *
 cd bin
 cp -p * /usr/local/bin
 cp -p -r include lib man share /usr/local

Fix missing symbolic links :
 cd /usr/local/lib
 ln -s libjvm.so.0.0.0 libjvm.so
 ln -s libjvm.so.0.0.0 libjvm.so.0
 ln -s libz.so.1.2.3 libz.so
 ln -s libz.so.1.2.3 libz.so.1
 ln -s libffi.so.5.0.10 libffi.so.5.0
 ln -s libffi.so.5.0.10 libffi.so.5
 ln -s libffi.so.5.0.10 libffi.so
 ln -s /usr/local/share/classpath/glibj.zip rt.jar
 cd classpath
 ln -s libjavaio.so.0.0.0 libjavaio.so
 ln -s libjavaio.so.0.0.0 libjavaio.so.0
 ln -s libjavalangmanagement.so.0.0.0 libjavalangmanagement.so
 ln -s libjavalangmanagement.so.0.0.0 libjavalangmanagement.so.0
 ln -s libjavalangreflect.so.0.0.0 libjavalangreflect.so
 ln -s libjavalangreflect.so.0.0.0 libjavalangreflect.so.0
 ln -s libjavalang.so.0.0.0 libjavalang.so
 ln -s libjavalang.so.0.0.0 libjavalang.so.0
 ln -s libjavanet.so.0.0.0 libjavanet.so
 ln -s libjavanet.so.0.0.0 libjavanet.so.0
 ln -s libjavanio.so.0.0.0 libjavanio.so
 ln -s libjavanio.so.0.0.0 libjavanio.so.0
 ln -s libjavautil.so.0.0.0 libjavautil.so
 ln -s libjavautil.so.0.0.0 libjavautil.so.0

= Basic testing for the main binaries =

== JamVM ==

 # /usr/local/bin/jamvm -version
 java version "1.5.0"
 JamVM version 1.5.4
 Copyright (C) 2003-2010 Robert Lougher <rob@jamvm.org.uk>
 -
 This program is free software; you can redistribute it and/or
 modify it under the terms of the GNU General Public License
 as published by the Free Software Foundation; either version 2,
 or (at your option) any later version.
 -
 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.
 -
 Build information:
 Execution Engine: inline-threaded interpreter with stack-caching
 Compiled with: gcc 4.2.1
 Boot Library Path: /usr/local/lib/classpath
 Boot Class Path: /usr/local/share/jamvm/classes.zip:/usr/local/share/classpath/glibj.zip

== Jikes ==

 # /usr/local/bin/jikes -version
 Jikes Compiler - Version 1.22 - 3 October 2004
 Copyright (C) IBM Corporation 1997-2003, 2004.
 - Licensed Materials - Program Property of IBM - All Rights Reserved.
 Originally written by Philippe Charles and David Shields of IBM Research,
 Jikes is now maintained and refined by the Jikes Project at:
 <http://ibm.com/developerworks/opensource/jikes>
 Please consult this URL for more information and for reporting problems.

= Compiling and Running a HelloWorld Java Program =

== console text mode ==

=== Compiling ===

For this example, I use a novacom connexion on my Palm Pre.
 cd /media/internal
 vi myfirstjavaprog.java 
and add the following lines in the myfirstjavaprog.java ([http://www.javacoffeebreak.com/java101/java101.html source]) :
 class myfirstjavaprog
 {  
   public static void main(String args[])
   {
    System.out.println("Hello World!");
   }
 }

Compile :
 # /usr/local/bin/jikes -bootclasspath /usr/local/share/jamvm/classes.zip:/usr/local/share/classpath/glibj.zip myfirstjavaprog.java
 ls -l 
 ...
 -rwxrwxrwx    1 root     root           440 Jan  2 14:38 myfirstjavaprog.class
 ...

=== Running ===

 /usr/local/bin/jamvm  myfirstjavaprog
or 
 /usr/local/bin/jamvm -client -classpath/usr/local/share/jamvm/classes.zip:/usr/local/share/classpath/glibj.zip myfirstjavaprog
and you can see :
 Hello World!

== GUI mode ==

=== Compiling ===

For this example, I use a novacom connexion on my Palm Pre.
 cd /media/internal
 vi HelloWorld.java 
and add the following lines in the HelloWorld.java ([http://www.xinotes.org/notes/note/1105/ source]) :
 import java.awt.*;
 import java.awt.event.*;
 public class HelloWorld extends Frame {
    public static void main (String [] argv){
       HelloWorld h = new HelloWorld();
    }
    public HelloWorld(){
      setTitle("Hello World!");
      setSize(150, 125);
      Panel hello = new Panel();
      add("Center", hello);
      Button button = new Button("OK");
      add("South", button);
      button.addActionListener(new ActionListener() {
          public void actionPerformed(ActionEvent e) {
             System.exit(0);
          }
        });
      setVisible(true);
      int width = hello.getWidth();
      int height = hello.getHeight();
      Graphics g = hello.getGraphics();
      g.drawString("Hello World!", width/2 - 25, height/2);
      addWindowListener(new WindowAdapter(){
           public void windowClosing(WindowEvent e){ 
               System.exit(0);
           }
      });
    }
 }

Compile :
 # /usr/local/bin/jikes -bootclasspath /usr/local/share/jamvm/classes.zip:/usr/local/share/classpath/glibj.zip HelloWorld.java
 ls -l 
 ...
 -rwxrwxrwx    1 root     root           440 Jan  2 14:38 HelloWorld.class
 ...

=== Running ===

 /usr/local/bin/jamvm  HelloWorld
or 
 /usr/local/bin/jamvm -client -classpath/usr/local/share/jamvm/classes.zip:/usr/local/share/classpath/glibj.zip HelloWorld
and you can see a GUI window :
 Hello World!

== Audio mode ==
[http://rbwhitaker.wikidot.com/java-play-audio Playing Audio in Java]

= Files installed by each program =

== Gnu Classpath ==

 [SB2 mapping-armv7 armv7] ubuntu@ubuntu-VirtualBox classpath-0.98 $ ls -l /usr/local/bin
 total 52
 -rwxr-xr-x 1 ubuntu ubuntu 2073 2012-01-01 19:23 gappletviewer
 -rwxr-xr-x 1 ubuntu ubuntu 2058 2012-01-01 19:23 gjar
 -rwxr-xr-x 1 ubuntu ubuntu 2070 2012-01-01 19:23 gjarsigner
 -rwxr-xr-x 1 ubuntu ubuntu 2062 2012-01-01 19:23 gjavah
 -rwxr-xr-x 1 ubuntu ubuntu 2113 2012-01-01 19:23 gjdoc
 -rwxr-xr-x 1 ubuntu ubuntu 2066 2012-01-01 19:23 gkeytool
 -rwxr-xr-x 1 ubuntu ubuntu 2084 2012-01-01 19:23 gnative2ascii
 -rwxr-xr-x 1 ubuntu ubuntu 2060 2012-01-01 19:23 gorbd
 -rwxr-xr-x 1 ubuntu ubuntu 2060 2012-01-01 19:23 grmic
 -rwxr-xr-x 1 ubuntu ubuntu 2060 2012-01-01 19:23 grmid
 -rwxr-xr-x 1 ubuntu ubuntu 2074 2012-01-01 19:23 grmiregistry
 -rwxr-xr-x 1 ubuntu ubuntu 2075 2012-01-01 19:23 gserialver
 -rwxr-xr-x 1 ubuntu ubuntu 2070 2012-01-01 19:23 gtnameserv

 [SB2 mapping-armv7 armv7] ubuntu@ubuntu-VirtualBox classpath-0.98 $ ls -l /usr/local/include
 total 80
 -rw-r--r-- 1 ubuntu ubuntu  3516 2012-01-01 19:23 jawt.h
 -rw-r--r-- 1 ubuntu ubuntu  2349 2012-01-01 19:23 jawt_md.h
 -rw-r--r-- 1 ubuntu ubuntu 66655 2012-01-01 19:23 jni.h
 -rw-r--r-- 1 ubuntu ubuntu  1547 2012-01-01 19:23 jni_md.h


 [SB2 mapping-armv7 armv7] ubuntu@ubuntu-VirtualBox classpath-0.98 $ ls -l /usr/local/lib
 total 12
 drwxr-xr-x 2 ubuntu ubuntu 4096 2012-01-01 19:23 classpath
 -rw-r--r-- 1 ubuntu ubuntu 1437 2012-01-01 19:23 logging.properties
 drwxr-xr-x 2 ubuntu ubuntu 4096 2012-01-01 19:23 security

 [SB2 mapping-armv7 armv7] ubuntu@ubuntu-VirtualBox classpath-0.98 $ ls -l /usr/local/lib/classpath 
 total 1228
 -rwxr-xr-x 1 ubuntu ubuntu    806 2012-01-01 19:23 libjavaio.la
 lrwxrwxrwx 1 ubuntu ubuntu     18 2012-01-01 19:23 libjavaio.so -> libjavaio.so.0.0.0
 lrwxrwxrwx 1 ubuntu ubuntu     18 2012-01-01 19:23 libjavaio.so.0 -> libjavaio.so.0.0.0
 -rwxr-xr-x 1 ubuntu ubuntu 177244 2012-01-01 19:23 libjavaio.so.0.0.0
 -rwxr-xr-x 1 ubuntu ubuntu    818 2012-01-01 19:23 libjavalang.la
 -rwxr-xr-x 1 ubuntu ubuntu    878 2012-01-01 19:23 libjavalangmanagement.la
 lrwxrwxrwx 1 ubuntu ubuntu     30 2012-01-01 19:23 libjavalangmanagement.so -> libjavalangmanagement.so.0.0.0
 lrwxrwxrwx 1 ubuntu ubuntu     30 2012-01-01 19:23 libjavalangmanagement.so.0 -> libjavalangmanagement.so.0.0.0
 -rwxr-xr-x 1 ubuntu ubuntu  25052 2012-01-01 19:23 libjavalangmanagement.so.0.0.0
 -rwxr-xr-x 1 ubuntu ubuntu    860 2012-01-01 19:23 libjavalangreflect.la
 lrwxrwxrwx 1 ubuntu ubuntu     27 2012-01-01 19:23 libjavalangreflect.so -> libjavalangreflect.so.0.0.0
 lrwxrwxrwx 1 ubuntu ubuntu     27 2012-01-01 19:23 libjavalangreflect.so.0 -> libjavalangreflect.so.0.0.0
 -rwxr-xr-x 1 ubuntu ubuntu  24773 2012-01-01 19:23 libjavalangreflect.so.0.0.0
 lrwxrwxrwx 1 ubuntu ubuntu     20 2012-01-01 19:23 libjavalang.so -> libjavalang.so.0.0.0
 lrwxrwxrwx 1 ubuntu ubuntu     20 2012-01-01 19:23 libjavalang.so.0 -> libjavalang.so.0.0.0
 -rwxr-xr-x 1 ubuntu ubuntu 378668 2012-01-01 19:23 libjavalang.so.0.0.0
 -rwxr-xr-x 1 ubuntu ubuntu    812 2012-01-01 19:23 libjavanet.la
 lrwxrwxrwx 1 ubuntu ubuntu     19 2012-01-01 19:23 libjavanet.so -> libjavanet.so.0.0.0
 lrwxrwxrwx 1 ubuntu ubuntu     19 2012-01-01 19:23 libjavanet.so.0 -> libjavanet.so.0.0.0
 -rwxr-xr-x 1 ubuntu ubuntu 263348 2012-01-01 19:23 libjavanet.so.0.0.0
 -rwxr-xr-x 1 ubuntu ubuntu    812 2012-01-01 19:23 libjavanio.la
 lrwxrwxrwx 1 ubuntu ubuntu     19 2012-01-01 19:23 libjavanio.so -> libjavanio.so.0.0.0
 lrwxrwxrwx 1 ubuntu ubuntu     19 2012-01-01 19:23 libjavanio.so.0 -> libjavanio.so.0.0.0
 -rwxr-xr-x 1 ubuntu ubuntu 311502 2012-01-01 19:23 libjavanio.so.0.0.0
 -rwxr-xr-x 1 ubuntu ubuntu    818 2012-01-01 19:23 libjavautil.la
 lrwxrwxrwx 1 ubuntu ubuntu     20 2012-01-01 19:23 libjavautil.so -> libjavautil.so.0.0.0
 lrwxrwxrwx 1 ubuntu ubuntu     20 2012-01-01 19:23 libjavautil.so.0 -> libjavautil.so.0.0.0
 -rwxr-xr-x 1 ubuntu ubuntu  27292 2012-01-01 19:23 libjavautil.so.0.0.0

 [SB2 mapping-armv7 armv7] ubuntu@ubuntu-VirtualBox classpath-0.98 $ ls -l /usr/local/lib/security 
 total 4
 -rw-r--r-- 1 ubuntu ubuntu 2489 2012-01-01 19:23 classpath.security

 [SB2 mapping-armv7 armv7] ubuntu@ubuntu-VirtualBox classpath-0.98 $ ls -l /usr/local/share
 total 12
 drwxr-xr-x 2 ubuntu ubuntu 4096 2012-01-01 19:23 classpath
 drwxr-xr-x 2 ubuntu ubuntu 4096 2012-01-01 19:22 info
 drwxr-xr-x 3 ubuntu ubuntu 4096 2012-01-01 19:22 man
 [SB2 mapping-armv7 armv7] ubuntu@ubuntu-VirtualBox classpath-0.98 $ ls -l /usr/local/share/classpath
 total 10780
 -rw-r--r-- 1 ubuntu ubuntu 9832050 2012-01-01 19:22 glibj.zip
 -rw-r--r-- 1 ubuntu ubuntu 1204211 2012-01-01 19:23 tools.zip
 [SB2 mapping-armv7 armv7] ubuntu@ubuntu-VirtualBox classpath-0.98 $ ls -l /usr/local/share/info     
 total 292
 -rw-r--r-- 1 ubuntu ubuntu  83532 2012-01-01 19:22 cp-hacking.info
 -rw-r--r-- 1 ubuntu ubuntu 106990 2012-01-01 19:22 cp-tools.info
 -rw-r--r-- 1 ubuntu ubuntu  98304 2012-01-01 19:22 cp-vmintegration.info
 -rw-r--r-- 1 ubuntu ubuntu    815 2012-01-01 19:22 dir
 [SB2 mapping-armv7 armv7] ubuntu@ubuntu-VirtualBox classpath-0.98 $ ls -l /usr/local/share/man 
 total 4
 drwxr-xr-x 2 ubuntu ubuntu 4096 2012-01-01 19:23 man1
 [SB2 mapping-armv7 armv7] ubuntu@ubuntu-VirtualBox classpath-0.98 $ ls -l /usr/local/share/man/man1
 total 164
 -rw-r--r-- 1 ubuntu ubuntu  7997 2012-01-01 19:22 gappletviewer.1
 -rw-r--r-- 1 ubuntu ubuntu  5592 2012-01-01 19:23 gcjh.1
 -rw-r--r-- 1 ubuntu ubuntu  5918 2012-01-01 19:23 gjar.1
 -rw-r--r-- 1 ubuntu ubuntu  9590 2012-01-01 19:23 gjarsigner.1
 -rw-r--r-- 1 ubuntu ubuntu  5750 2012-01-01 19:23 gjavah.1
 -rw-r--r-- 1 ubuntu ubuntu 35310 2012-01-01 19:23 gjdoc.1
 -rw-r--r-- 1 ubuntu ubuntu 35536 2012-01-01 19:23 gkeytool.1
 -rw-r--r-- 1 ubuntu ubuntu  4594 2012-01-01 19:23 gnative2ascii.1
 -rw-r--r-- 1 ubuntu ubuntu  4825 2012-01-01 19:23 gorbd.1
 -rw-r--r-- 1 ubuntu ubuntu  5084 2012-01-01 19:23 grmid.1
 -rw-r--r-- 1 ubuntu ubuntu  5036 2012-01-01 19:23 grmiregistry.1
 -rw-r--r-- 1 ubuntu ubuntu  4512 2012-01-01 19:23 gserialver.1
 -rw-r--r-- 1 ubuntu ubuntu  4592 2012-01-01 19:23 gtnameserv.1

== JamVM ==

 [SB2 mapping-armv7 armv7] ubuntu@ubuntu-VirtualBox jamvm-1.5.4 $ ls -l /usr/local/bin
 total 444
 -rwxr-xr-x 1 ubuntu ubuntu 400821 2012-01-01 19:38 jamvm

 [SB2 mapping-armv7 armv7] ubuntu@ubuntu-VirtualBox jamvm-1.5.4 $ ls -l /usr/local/include
 total 108
 -rw-r--r-- 1 ubuntu ubuntu 14042 2012-01-01 19:38 jni.h

'''Note''' : JamVM replace the jni.h file from Gnu Classpath by his own jni.h file  

 [SB2 mapping-armv7 armv7] ubuntu@ubuntu-VirtualBox jamvm-1.5.4 $ ls -l /usr/local/lib    
 total 636
 -rwxr-xr-x 1 ubuntu ubuntu    817 2012-01-01 19:37 libjvm.la
 lrwxrwxrwx 1 ubuntu ubuntu     15 2012-01-01 19:37 libjvm.so -> libjvm.so.0.0.0
 lrwxrwxrwx 1 ubuntu ubuntu     15 2012-01-01 19:37 libjvm.so.0 -> libjvm.so.0.0.0
 -rwxr-xr-x 1 ubuntu ubuntu 556829 2012-01-01 19:37 libjvm.so.0.0.0
 lrwxrwxrwx 1 ubuntu ubuntu     46 2012-01-01 19:38 rt.jar -> /usr/local/share/classpath/glibj.zip

 [SB2 mapping-armv7 armv7] ubuntu@ubuntu-VirtualBox jamvm-1.5.4 $ ls -l /usr/local/share
 total 16
 drwxr-xr-x 2 ubuntu ubuntu 4096 2012-01-01 19:38 jamvm

 [SB2 mapping-armv7 armv7] ubuntu@ubuntu-VirtualBox jamvm-1.5.4 $ ls -l /usr/local/share/jamvm   
 total 24 
 -rw-r--r-- 1 ubuntu ubuntu 22133 2009-12-31 19:42 classes.zip

== Jikes ==

 [SB2 mapping-armv7 armv7] ubuntu@ubuntu-VirtualBox jikes-1.22 $ ls -ltr /usr/local/bin
 total 8260
 -rwxr-xr-x 1 ubuntu ubuntu 8002423 2012-01-01 19:56 jikes

 [SB2 mapping-armv7 armv7] ubuntu@ubuntu-VirtualBox jikes-1.22 $ ls -ltr /usr/local/include
 total 116

 -rw-r--r-- 1 ubuntu ubuntu  5794 2012-01-01 19:56 jikesapi.h

 [SB2 mapping-armv7 armv7] ubuntu@ubuntu-VirtualBox jikes-1.22 $ ls -ltr /usr/local/share
 total 20

 drwxr-xr-x 3 ubuntu ubuntu 4096 2012-01-01 19:56 doc

 [SB2 mapping-armv7 armv7] ubuntu@ubuntu-VirtualBox jikes-1.22 $ ls -ltr /usr/local/share/doc/jikes-1.22
 total 12
 -rw-r--r-- 1 ubuntu ubuntu 11886 2012-01-01 19:56 license.htm

= Links used to do the webOS port =

== Iphone ==

Patches used for the JamVM port for Iphone 
http://test.saurik.com/iphone/jamvm/

IPhone Java
http://web.archive.org/web/20071230000038/http://iphone.fiveforty.net/wiki/index.php/IPhone_Java

Talk:IPhone Java
http://web.archive.org/web/20071230050607/http://iphone.fiveforty.net/wiki/index.php/Talk:IPhone_Java

(JamVM Forum) JamVM port to iPhone?
http://sourceforge.net/projects/jamvm/forums/forum/256481/topic/1866438

Tutorials Java on Iphone :
http://iphoneroot.com/category/java/
http://iphoneroot.com/tutorial-install-java-on-the-iphone/

== JamVM ==

JamVM developer blog
http://draenog.blogspot.com/

how to build GNU Classpath and JamVM
http://sourceforge.net/projects/jamvm/forums/forum/256481/topic/3208847?message=7193290
http://free-electrons.com/doc/java-labs.odt
http://wiki.chumby.com/index.php/Java
http://fuseyism.com/openjdk/cvmi/jamvmport.xhtml

JamVM used in Ubuntu 
https://launchpad.net/ubuntu/oneiric/+source/openjdk-6/6b23~pre4-0ubuntu1
with the latest code in GIT ???
http://draenog.blogspot.com/2011/02/openjdkjamvm-git-repository.html

== OpenJDK ==

For the future when the next JamVM release will be available, replace Gnu Classpath by OpenJDK Java classes :

CrossCompilingOpenJDK
https://evolvis.org/plugins/mediawiki/wiki/jalimo/index.php/CrossCompilingOpenJDK

CrossCompileFaq
http://icedtea.classpath.org/wiki/CrossCompileFaq

JDK6 for embedded ARM
http://mail.openjdk.java.net/pipermail/jdk6-dev/2009-April/000455.html