From ba01edece577c3998c9851979e7ed31cf17ac810 Mon Sep 17 00:00:00 2001
From: xzyangha <xianzhao.yang@i-soft.com.cn>
Date: Tue, 24 Nov 2020 12:19:33 +0800
Subject: [PATCH] =?UTF-8?q?=E6=B7=BB=E5=8A=A0readme.txt=E3=80=82=E5=85=B6?=
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---
 readme.txt | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
 create mode 100644 readme.txt

diff --git a/readme.txt b/readme.txt
new file mode 100644
index 0000000..9169b11
--- /dev/null
+++ b/readme.txt
@@ -0,0 +1,14 @@
+gcc 会优化代码，把部分数据结构的操作替换成内置memcpy
+
+例如:
+
+int fun(){
+	struct{
+		char buff[200];
+	}ss[10];
+	ss[0]=ss[1];
+}
+
+就类似这样的代码，编译之后直接内置memcpy
+
+-fno-builtin --ffreestanding,加了没有任何区别
-- 
Gitee