From 794f969d36be7368706e9aafe617649bbdece8df Mon Sep 17 00:00:00 2001
From: mysterywolf <920369182@qq.com>
Date: Tue, 10 Nov 2020 12:55:21 +0800
Subject: [PATCH 1/2] [libc][armlibc] add readme

---
 components/libc/compilers/armlibc/README.md | 3 +++
 1 file changed, 3 insertions(+)
 create mode 100644 components/libc/compilers/armlibc/README.md

diff --git a/components/libc/compilers/armlibc/README.md b/components/libc/compilers/armlibc/README.md
new file mode 100644
index 0000000000..8126038e46
--- /dev/null
+++ b/components/libc/compilers/armlibc/README.md
@@ -0,0 +1,3 @@
+## More Information
+
+https://www.keil.com/support/man/docs/armlib/
\ No newline at end of file

From d5f88301779b943260f044a9c65b2570bf9f7b3c Mon Sep 17 00:00:00 2001
From: mysterywolf <920369182@qq.com>
Date: Tue, 10 Nov 2020 13:06:16 +0800
Subject: [PATCH 2/2] add newlib/dlib readme

---
 components/libc/compilers/armlibc/README.md | 6 ++++++
 components/libc/compilers/common/readme.md  | 2 +-
 components/libc/compilers/dlib/README.md    | 7 ++++++-
 components/libc/compilers/newlib/README.md  | 9 +++++++++
 4 files changed, 22 insertions(+), 2 deletions(-)
 create mode 100644 components/libc/compilers/newlib/README.md

diff --git a/components/libc/compilers/armlibc/README.md b/components/libc/compilers/armlibc/README.md
index 8126038e46..4d2a73b6be 100644
--- a/components/libc/compilers/armlibc/README.md
+++ b/components/libc/compilers/armlibc/README.md
@@ -1,3 +1,9 @@
+# ARMLIB (Keil-MDK) porting for RT-Thread
+
+Please define RT_USING_LIBC and compile RT-Thread with Keil-MDK compiler.
+
+
+
 ## More Information
 
 https://www.keil.com/support/man/docs/armlib/
\ No newline at end of file
diff --git a/components/libc/compilers/common/readme.md b/components/libc/compilers/common/readme.md
index 0cd56272ff..99797d933c 100644
--- a/components/libc/compilers/common/readme.md
+++ b/components/libc/compilers/common/readme.md
@@ -1,4 +1,4 @@
-# Attention : 
+## Attentions
 
 1. This folder is "common" for armlibc newlibc and dlib. It's not "common" for minilibc.
 
diff --git a/components/libc/compilers/dlib/README.md b/components/libc/compilers/dlib/README.md
index 846eb3f5c0..acd08f9074 100644
--- a/components/libc/compilers/dlib/README.md
+++ b/components/libc/compilers/dlib/README.md
@@ -1,4 +1,9 @@
-Dlib(IAR) porting for RT-Thread.
+# DLIB (IAR) porting for RT-Thread
 
 Please define RT_USING_LIBC and compile RT-Thread with IAR compiler.
 
+
+
+## More Information
+
+http://www.iarsys.co.jp/download/LMS2/arm/7502/ewarm7502doc/arm/doc/EWARM_DevelopmentGuide.ENU.pdf    P.130
\ No newline at end of file
diff --git a/components/libc/compilers/newlib/README.md b/components/libc/compilers/newlib/README.md
new file mode 100644
index 0000000000..385f329a4f
--- /dev/null
+++ b/components/libc/compilers/newlib/README.md
@@ -0,0 +1,9 @@
+# NEWLIB (GCC) porting for RT-Thread
+
+Please define RT_USING_LIBC and compile RT-Thread with GCC compiler.
+
+
+
+## More Information
+
+https://sourceware.org/newlib/libc.html#Reentrancy
\ No newline at end of file