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From: David Michel <dmichel76@googlemail.com>
To: java@gcc.gnu.org
Subject: How to convert a jar into so file and use it ?
Date: Wed, 10 Jun 2009 09:40:00 -0000	[thread overview]
Message-ID: <b5bf7a380906100239j478ed915scee4a008fd44e201@mail.gmail.com> (raw)

Hello,

I have a very simple java test code that uses a public method called
'coucou' of a external jar called 'Hello.jar' which contains the
package 'hello' and the public class 'Hello'. Here is the test code
Tool.java:

import hello.Hello;

public class Tool
{
   public static void main(String[] args)
   {
     System.out.println("main program running");
     Hello.coucou();
   }
}

which I would usually compile, with the following commands:

$ gcj -O0 -g0  -C Tool.java --classpath=./:extern/Hello.jar
$ gij -cp .:extern/Hello.jar Tool

Now if I want to compile Tool.java natively with gcj, what do I need to do ?

I can create the shared library from the jar like this:
$ gcj -O0 -g0  -shared -findirect-dispatch -fjni -fPIC
extern/Hello.jar -o extern/Hello.jar.so


I can then compile Tool.java into Tool.o with:
$ gcj -O0 -g0  --classpath=./:extern/Hello.jar  -c Tool.java -o Tool.o

(altough this is using the jar and not the so ??)

But then, I'm stuck with creating the final executable, i.e. Tool.out

Any clues ?

Cheers
David

             reply	other threads:[~2009-06-10  9:40 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-06-10  9:40 David Michel [this message]
2009-06-10 10:16 ` Andrew Haley
2009-06-10 10:50   ` David Michel
2009-06-10 11:06     ` Andrew Haley
2009-06-10 11:53       ` Vaijayanthi Mala Suresh
2009-06-10 12:10         ` Andrew Haley
2009-06-10 12:23           ` David Michel

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