Regression with Arduino101 : vsnprintf does not compile

It’s a regression compare with Arduino ZERO, UNO, MEGA, NANO, function < vsnprintf > does not compile on Arduino101.


#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

void Print(char *fmt, … ) {
char tmp[128]; // resulting string limited to 128 chars
va_list args;
va_start (args, fmt );
vsnprintf(tmp, 128, fmt, args);
va_end (args);
Serial.print(tmp);
}

Compile ERROR is :

XotolG3:29: error: ‘vsnprintf’ was not declared in this scope

vsnprintf(tmp, 128, fmt, args);