java-gnome and gcj

[Olivier]

Hi,

I have been trying to get java-gnome to work with gcj.
Java-GNOME ( http://java-gnome.sourceforge.net ) is a set of Java 
bindings for GNOME and GTK libraries. It is implemented as a JNI layer.

I have managed to compile the First example from their tutorial with 
gcj but runing it fails with the following message:

tournesol:~/program/java/gnome/gcj$ ./First 

Gtk-CRITICAL **: file gtkwindow.c: line 438 (gtk_window_set_focus): assertion `GTK_IS_WIDGET (focus)' failed.


Obviously, it's not very helpful! Before I go any further I would like
to check the steps I did to compile java-gnome and this example. Maybe
I have done a beginers mistake. If you think everything is ok I'll try to
debug the example and figure out what's breaking.

Thank you very much.


Following are the steps I've done:

- Step 1
  compiled java-gnome out of the box with jdk1.3 and gcc2.95.4

  got gnome.jar and gtk.jar  (the java wrappers)
  and libGNOMEJava.so, libGTKJava.so  (the native methods).

  I have tested various examples with jdk1.3, it is all working.

- Step 2
  recompiled all the java wrappers (packages gnu.gtk, gnu.gdk, 
  and gnu.gnome) with gcj as follow:

  
  for fjava in `find . -name '*.java'`; do
     fo=${fjava/.java/.o}
     gcj -fPIC -fjni --classpath=$CLASSPATH -o $fo -c $fjava
  done

  objects=`find . -name '*.o'`
  gcj -shared $objects -o gnu.so

  which gave me 'gnu.so' lib.

- Step 3
  Recompiled First.java example as follow:

  LIBGCJ_JAR=/usr/local/gcc/share/libgcj.jar
  GTK_JAR=~/tmp/java-gnome-0.6.0/lib/gtk.jar
  GNOME_JAR=~/tmp/java-gnome-0.6.0/lib/gnome.jar

  gcj -fPIC --classpath=$LIBGCJ_JAR:$GTK_JAR:$GNOME_JAR -o tutorial/First.o -c tutorial/First.java
  gcj -o First --main=First tutorial/First.o gnu.so


- Step 4 
  ran the example:

  #set LD path to contain gnu.so, libGNOMEJava.so and libGTKJava.so
  export LD_LIBRARY_PATH=/usr/local/gcc/lib:~/tmp/java-gnome-0.6.0/lib:.

  ./First


which output:

   Gtk-CRITICAL **: file gtkwindow.c: line 438 (gtk_window_set_focus): assertion `GTK_IS_WIDGET (focus)' failed.

and does not display anything.


Thanks.

Olivier

-- 
----------------------------------------------------------------------
Olivier Louchart-Fletcher
Email: olivier@zipworld.com.au