Re: Compiling for multiple Linux distros

[Donal Riordan <riordan at effor-dev dot org>]

Hi Andrew,

The test case I was using was SWT's hello world snippet so it's quite small:

public class SWT {
  public static void main (String [] args) {
     Display display = new Display ();
     Shell shell = new Shell(display);
     shell.open ();
     while (!shell.isDisposed ()) {
        if (!display.readAndDispatch ()) display.sleep ();
     }
     display.dispose ();
  }
}

Hope this helps,
Donal

Andrew Haley wrote:
> Donal Riordan wrote:
>   
> > Hi, sorry to re-open this problem but compiling SWT applications for
> > multiple distros is proving troublesome.
> >
> > For my test case I'm trying to compile a simple 'hello world' swt app on
> > Ubuntu and have the executable run on a fresh Fedora installation (it's
> > a vm-ware image in case that matters).
> >
> > On Ubuntu I compile the libswt.a library using:
> > gcj -c -findirect-dispatch -fjni swt.jar -o libswt.a
> > and then compile my application using:
> > gcj -fjni -findirect-dispatch -classpath swt.jar --main=SWT SWT.java -o
> > swt-ubuntu -L. -Wl,--no-whole-archive -lswt
> >
> > The resultant executable works fine in Ubuntu but when I try to execute
> > it in Fedora I get libgcj linking problems again:
> > error while loading shared libraries: libgcj.so.81: cannot open shared
> > object file: No such file or directory
> >
> > I've been able to compile non-SWT programs in Ubuntu such that they run
> > correctly on Fedora - I only encounter this problem when I try to use SWT.
> >     
>
> Well, I could debug it but I don't have the code, so either you'll have to
> produce a small (very small) test case that demonstrates the problem, or
> you'll have to debug it yourself.  Clearly, someone is retaining a hard
> link against libgcj, but I don't know which file it is.
>
> Andrew.
>
>