I am making a viewing program that needs to acces C(++)-code. I have compiled
a Native library (libLoad.so) by means of the following commands :
g++ -fPIC-c -I[jdk-root]/include -I[jdk-root]/include/genunix Load.cc Load.o
ld -shared Load.o -o libLoad.so
When I run my java-program the following error occurs:
...../libLoad.so: undefined symbol: __eh_pc (libLoad.so)
the c++ code is:
#include <jni.h>
#include "Load.h"
#include <stdio.h>
#include <iostream.h>
#include <fstream.h>
#include <stdlib.h>
JNIEXPORT void JNICALL Java_SIgnalViewer_SIgnalViewerFrame_sumArray(JNIEnv *env,
jobject obj, jintArray java_array, jstring name, jint count, jint bsize, jint sliceno,
jint frames)
{
struct CPP_array{unsigned short int Value[256][256];};
int q,i,j,w, search_size;
search_size=((sliceno-1)*bsize*frames)+(count*bsize);
const char *filename=env->GetStringUTFChars(name,0);
struct CPP_array Array;
ifstream LoadArray(filename,ios::in|ios::binary);
if(!(LoadArray) )
{ cout<<"Cannot open file\n";
//return 0;
}
LoadArray.seekg(search_size,ios::beg);
LoadArray.read((unsigned char *)&Array,sizeof(CPP_array));
LoadArray.close();
env->ReleaseStringUTFChars(name,filename);
jsize array_len=env->GetArrayLength(java_array);
jint *array_p=env->GetIntArrayElements(java_array,0);
for(i=0;i<256;i++)
{
for(j=0;j<256;j++)
{
array_p[(i*256)+j]=Array.Value[i][j];
}
}
env->ReleaseIntArrayElements(java_array,array_p,0);
}
I believe the problem is related to libstdc++.so, __eh_pc is only to be found
in that shared library, but I do not know how to make it work.
The version of my libstdc++ is : 2.8.0
I am running redhat 5.2
Does anybody know what I am doing wrong ??
Any help is greatly appreciated, I've been stuck on this for days now :-(
Dennis Riedijk
