Re: Java Native Interface

[Oleg Krivosheev <kriol@fnal.gov>]

   Hello!

   Does JNI work with DEBIAN???
   If it does, how do i compile a C program to work with it.
   I wrote the following example named foo.c:

   #include "mienk_Native.h"
   #include <stdio.h>
   JNIEXPORT jint JNICALL Java_mienk_Native_field(JNIEnv * Kama, jclass
   Kama1, jint port)
   {
    FILE *kiFile;
    kiFile=fopen("out8081","wt");
    fprintf(kiFile,"whatever whatever \nend");
    close(kiFile);
    return port;
   }

   I have compiled it using 

   gcc foo.c  -o libField.so -L/usr/lib -idirafter /usr/lib/jdk1.1/include/\
    -shared

   Java loads the library, and the C opens the file but does not write in it
   or can't close it.

just wild guess - code is not compiled to be position independent

try

gcc -c -fPIC foo.c
gcc -shared -o libfoo.so foo.o


OK