Date: Wed, 28 Jul 1999 22:06:34 -0600 From: "E. Scott Larsen" <larsene@bahay.rn.byu.edu> To: freebsd-java@freebsd.org Subject: jni Message-ID: <379FD34A.DEBADA13@bahay.rn.byu.edu>
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I'm looking into using the JNI for an upcoming project, and hava a
question about using on
FreeBSD. I'm doing a very simple example (code for each file is below)
from the Essential
JNI (Rob Gordon, Prentace Hall...). I'm running FreeBSD-3.2-Stable
about a week old;
jdk1.1.8 just re-installed fresh this morning from cvsup'd ports, and
using the csh:
> cd /home/larsene/jni
> setenv LD_LIBRARY_PATH /home/larsene/jni:/usr/lib:/usr/local/lib
> rm *.o lib*
> g++ -c -fPIC *.c -I$JDK/include -I$JDK/include/freebsd
> g++ -shared -o libmylib.so -fPIC *.o
> java main
/usr/lib/libg++.so.4: Undefined symbol "__pure_virtual" (libmylib.so)
my error
>
I assume the problem is something missing from that LD..PATH setting, or
perhaps a
compiler flag. Anyone got a quick tip or a pointer to somewhere I aught
to look? Thanks
tons!!!
// file: main.java
public class main {
static {
try {
System.loadLibrary("mylib");
} catch (Error e) {
System.out.println("my error");
System.exit(0);
}
}
public static void main(String[] args) {
aclass c = new aclass();
c.theNativeMethod();
}
}
//file: aclass.java
public class aclass {
public native void theNativeMethod();
public void aJavaMethod() {
theNativeMethod();
}
}
//file: aclass.c
#include <stdio.h>
#include "aclass.h"
JNIEXPORT void JNICALL Java_aclass_theNativeMethod
(JNIEnv* env, jobject thisObj) {
printf("Hello Scott World\n");
}
//file: aclass.h ////generated by >javac aclass.java ; javah -jni
aclass
/* DO NOT EDIT THIS FILE - it is machine generated */
#include <jni.h>
/* Header for class aclass */
#ifndef _Included_aclass
#define _Included_aclass
#ifdef __cplusplus
extern "C" {
#endif
/*
* Class: aclass
* Method: theNativeMethod
* Signature: ()V
*/
JNIEXPORT void JNICALL Java_aclass_theNativeMethod
(JNIEnv *, jobject);
#ifdef __cplusplus
}
#endif
#endif
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