JNIEXPORT from c to java

#include <jni.h>
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
 
JNIEXPORT jbyteArray JNICALL Java_TSE_CreateIndex
  (JNIEnv * env, jobject jobj, jstring name) {
    caddr_t m;
    jbyteArray jb;
    jboolean iscopy;
    struct stat finfo;
    const char *mfile = (*env)->GetStringUTFChars(
                env, name, &iscopy);
    int fd = open(mfile, O_RDONLY);
 
    if (fd == -1) {
      printf("Could not open %s\n", mfile);
    }
    lstat(mfile, &finfo);
    m = mmap((caddr_t) 0, finfo.st_size,
                PROT_READ, MAP_PRIVATE, fd, 0);
    if (m == (caddr_t)-1) {
      printf("Could not mmap %s\n", mfile);
      return(0);
    }
    jb=(*env)->NewByteArray(env, finfo.st_size);
    (*env)->SetByteArrayRegion(env, jb, 0, 
    finfo.st_size, (jbyte *)m);
    close(fd);
    (*env)->ReleaseStringUTFChars(env, name, mfile);
    return (jb);
}

compile:

 gcc -fPIC -c ./TSE_Test.c -I/root/tmi/jdk1.7.0_04/include -I/root/tmi/jdk1.7.0_04/include/linux
 gcc  -o libnativelib.so -shared -Wl,-soname,libnative.so -I/root/tmi/jdk1.7.0_04/include -I/root/tmi/jdk1.7.0_04/include/linux TSE_Test.o