can't print wide character when using JNI

FULL PRODUCT VERSION :
java version "1.7.0_71"


ADDITIONAL OS VERSION INFORMATION :
Mint 32-bit
Linux alex-VirtualBox 3.13.0-24-generic #46-Ubuntu SMP Thu Apr 10 19:08:14 UTC 2014 i686 i686 i686 GNU/Linux

A DESCRIPTION OF THE PROBLEM :
This problem appears only in 32-bit! On my 64-bit machine, it is working correctly.

I'm using JNI. In my Java code, I call a function in a C file.

In the C file, when I'm using fwprint(stdout, L"something"), it doesn't work. It silently failed. I can see this behaviour from JDK 1.7.0!
With JDK 1.6.0, it is working.

What is interesting, is when I call fwide(stdout, 0). It returns 0, so I should be able to use wide char. But no...


REGRESSION. Last worked in version 6u45

ADDITIONAL REGRESSION INFORMATION:
java version "1.6.0_45"

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
I posted a question on stackoverflow: http://stackoverflow.com/questions/26422455/how-to-print-wide-character-using-jni

1) create a java file
2) create a C file
3) in the C file, use fwprintf(stdout, L"something");


EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
I expect to see "something" to be printed out in the console
ACTUAL -
nothing appear

ERROR MESSAGES/STACK TRACES THAT OCCUR :
there is no error message, it failed silently

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
JNIFoo.java
public class JNIFoo {
    public native void nativeFoo();

    static {
        System.loadLibrary("foo");
    }

    public void print () {
        nativeFoo();
        System.out.println("The end");
    }

    public static void main(String[] args) {
        (new JNIFoo()).print();
        return;
    }
}

foo.c
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <jni.h>
#include "JNIFoo.h"

JNIEXPORT void JNICALL Java_JNIFoo_nativeFoo (JNIEnv *env, jobject obj)
{
  // fwide(stdout, 0); -> return 0
  fwprintf(stdout, L"using fWprintf\n");
  fflush(stdout);
}

javac JNIFoo.java
javah -jni JNIFoo
gcc -shared -fpic -o libfoo.so -I/path/to/jdk/include -I/path/to/jdk/include/linux foo.c

jdk1.6.0_45/bin/java -Djava.library.path=/path/to/jni_test JNIFoo
jdk1.7.0/bin/java -Djava.library.path=/path/to/jni_test JNIFoo

---------- END SOURCE ----------