[libc] Fix the printf issue when disable DFS
#include <reent.h>
#include <sys/errno.h>
#include <sys/time.h>
+#include <stdio.h>
+
#include <rtthread.h>
#ifdef RT_USING_DFS
@@ -218,7 +220,7 @@ _ssize_t
_write_r(struct _reent *ptr, int fd, const void *buf, size_t nbytes)
{
#ifndef RT_USING_DFS
- if (fd == 0)
+ if (fileno(stdout) == fd)
{
rt_device_t console;
