Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm
List-Subscribe: <mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive: <http://sources.redhat.com/ml/cygwin/>
List-Post: <mailto:cygwin AT cygwin DOT com>
List-Help: <mailto:cygwin-help AT cygwin DOT com>, <http://sources.redhat.com/ml/#faqs>
Sender: cygwin-owner AT cygwin DOT com
Mail-Followup-To: cygwin AT cygwin DOT com
Delivered-To: mailing list cygwin AT cygwin DOT com
X-Spam-Filter: check_local AT alphatech DOT com 4.4(020923:1754) http://digitalanswers.org/
Message-Id: <4.3.2.7.2.20030801144049.0f67dfe8@mail.alphatech.com>
X-Sender: alant AT mail DOT alphatech DOT com
Date: Fri, 01 Aug 2003 14:41:43 -0700
To: "Marcus G. Daniels" <mgd AT santafe DOT edu>, cygwin AT cygwin DOT com
From: Alan Thompson <athompson AT alphatech DOT com>
Subject: Re: loading DLLs created with Cygwin into Sun JDK
In-Reply-To: <3F29E804.6000202@santafe.edu>
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"

Check out this solution from the mailing list archives:

http://sources.redhat.com/ml/cygwin/2003-06/msg00357.html

Alan Thompson

At 10:09 PM 7/31/2003 -0600, Marcus G. Daniels wrote:
>I'm having a problem getting DLLs compiled with Cygwin to load into Sun JDK 1.4.1.  In the past this has worked, so I hope this is fixable without too much work.
>
>Here's an example.  Take a simple Java Native Interface method like this:
>
>$ cat jniTest.c
>void Java_Test_test () { printf ("test\n");}
>
>And compile it like so:
>
>gcc -shared -o jniTest.dll jniTest.c
>
>Also needed is the Java-side file:
>
>public class Test {
>  public native void test ();
>  public static void main (String args[]) {
>    Test test = new Test ();
>    System.out.println ("loading jniTest");
>    System.loadLibrary ("jniTest");
>    System.out.println ("calling native method");
>    test.test ();
>    System.out.println ("success");
>  }
>}
>
>Compiled it like so from a Cygwin terminal (replace /cygdrive/i/j2sdk1.4.1_02 as appropriate):
>
>$ /cygdrive/i/j2sdk1.4.1_02/bin/javac Test.java
>
>Now run it, you should see it print "loading jniTest", but nothing more.
>
>$ CLASSPATH=. /cygdrive/i/j2sdk1.4.1_02/bin/java Test
>
>In contrast, relink the DLL, but not using "-mno-cygwin":
>
>$ gcc -mno-cygwin -shared -o jniTest.dll jniTest.c
>$ CLASSPATH=. /cygdrive/i/j2sdk1.4.1_02/bin/java Test
>
>Now it should print:
>
>loading jniTest
>calling native method
>test
>success
>
>
>
>
>--
>Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple
>Problem reports:       http://cygwin.com/problems.html
>Documentation:         http://cygwin.com/docs.html
>FAQ:                   http://cygwin.com/faq/
>



--
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple
Problem reports:       http://cygwin.com/problems.html
Documentation:         http://cygwin.com/docs.html
FAQ:                   http://cygwin.com/faq/