From 8e287cfdf70da52937eebe59a1e2527775dd1f0c Mon Sep 17 00:00:00 2001
From: Meco Man <920369182@qq.com>
Date: Mon, 27 Sep 2021 07:02:41 -0400
Subject: [PATCH] [libc][newlib][syscalls] fileno(stdout)->STDOUT_FILENO

---
 components/libc/compilers/newlib/syscalls.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/components/libc/compilers/newlib/syscalls.c b/components/libc/compilers/newlib/syscalls.c
index d46a264408..7ba06312ea 100644
--- a/components/libc/compilers/newlib/syscalls.c
+++ b/components/libc/compilers/newlib/syscalls.c
@@ -12,8 +12,9 @@
  */
 
 #include <reent.h>
-#include <errno.h>
+#include <sys/errno.h>
 #include <stdio.h>
+#include <unistd.h>
 #include <sys/time.h>
 
 #include <rtthread.h>
@@ -219,7 +220,7 @@ _ssize_t _write_r(struct _reent *ptr, int fd, const void *buf, size_t nbytes)
 {
 #ifndef RT_USING_DFS
 #if defined(RT_USING_CONSOLE) && defined(RT_USING_DEVICE)
-    if (fileno(stdout) == fd)
+    if (STDOUT_FILENO == fd)
     {
         rt_device_t console;
 
-- 
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