From 0cbb1f08c1d22e64cbc4d1399dca25eded37af0f Mon Sep 17 00:00:00 2001
From: liuxianliang <liuxianliang@rt-thread.com>
Date: Mon, 28 Jun 2021 12:39:19 +0800
Subject: [PATCH] [fix] set default lwip stack for old bsp folder.

---
 components/SConscript | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/components/SConscript b/components/SConscript
index 82efd7b2fe..88927f881c 100644
--- a/components/SConscript
+++ b/components/SConscript
@@ -7,6 +7,11 @@ objs = []
 cwd  = GetCurrentDir()
 list = os.listdir(cwd)
 
+# In some old bsp folder, Only define RT_USING_LWIP but not define which of LWIP stack.
+# For this reason, the default lwip stack will be set LWIP2.0.3.
+if not GetDepend('RT_USING_LWIP141') and not GetDepend('RT_USING_LWIP202') and not GetDepend('RT_USING_LWIP203') and not GetDepend('RT_USING_LWIP212'):
+    AddDepend('RT_USING_LWIP203')
+
 for item in list:
     if item in remove_components:
         continue