From b8d714b21d7d1214cf10884ecde8b75307b1d8c6 Mon Sep 17 00:00:00 2001
From: terrynini <ctinctin29@gmail.com>
Date: Thu, 15 Mar 2018 13:55:10 +0800
Subject: [PATCH] update_readme

---
 README.md | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/README.md b/README.md
index 57105ff..9b42e0f 100644
--- a/README.md
+++ b/README.md
@@ -13,3 +13,21 @@ B:     backpack??<br>
 
 Map will be randomly generate every time
 
+# Call C function in Assembly
+
+## generate a *.o file
+> $gcc -c test.c -o test.o
+
+or add pragma to tell IDE not to link
+>  #pragma src </br>
+
+
+## generate a *.a file
+
+>ar rcs libtst.a test.o
+
+
+## Gcc tips
+add this directive to notify gas using Intel syntax
+>.intel_syntax noprefix
+