From bb38fa0ee11cd4433e64517cea9a99a7280a3be6 Mon Sep 17 00:00:00 2001
From: dongheng <Dong Heng>
Date: Mon, 17 Jun 2019 20:32:22 +0800
Subject: [PATCH] fix(lwip): fix "unistd.h" I/O APIs not declare when disable
 VFS

When enable VFS, apps code should include "unistd.h", "sys/ioctl.h" or "fcntl.h" if using "read", "write", "close", "ioctl" and "fcntl".
---
 components/lwip/lwip/src/include/posix/sys/socket.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/components/lwip/lwip/src/include/posix/sys/socket.h b/components/lwip/lwip/src/include/posix/sys/socket.h
index 03bfd499..d6068709 100644
--- a/components/lwip/lwip/src/include/posix/sys/socket.h
+++ b/components/lwip/lwip/src/include/posix/sys/socket.h
@@ -33,3 +33,9 @@
 #include "sdkconfig.h"
 
 #include "lwip/sockets.h"
+
+#if !LWIP_POSIX_SOCKETS_IO_NAMES
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#endif /* !LWIP_POSIX_SOCKETS_IO_NAMES */