[libc] fix the fcntl issue in newlib

include/libc/libc_fcntl.h

@@ -1,6 +1,27 @@
 /*
- * fcntl.h file in libc
- */ 
+ * File      : libc_fcntl.h
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2017 - 2018, RT-Thread Development Team
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2018-02-07     Bernard      Add O_DIRECTORY definition in NEWLIB mode.
+ */
+
 #ifndef LIBC_FCNTL_H__
 #define LIBC_FCNTL_H__
 
@@ -8,11 +29,10 @@
 #include <fcntl.h>
 
 #ifndef O_NONBLOCK
-#define O_NONBLOCK    04000
+#define O_NONBLOCK   0x4000
 #endif
 
 #if defined(_WIN32)
-#define O_DIRECTORY 0200000
 #define O_ACCMODE   (_O_RDONLY | _O_WRONLY | _O_RDWR)
 #endif
 
@@ -23,6 +43,10 @@
 #define F_SETFL  4
 #endif
 
+#ifndef O_DIRECTORY
+#define O_DIRECTORY 0x200000
+#endif
+
 #else
 #define O_RDONLY         00
 #define O_WRONLY         01
@@ -77,4 +101,3 @@
 #endif
 
 #endif
-