From f425ed6bb72e74a7fef93db13bf5c02053f1bfbd Mon Sep 17 00:00:00 2001
From: Yuichi Nishiwaki <yuichi.nishiwaki@gmail.com>
Date: Thu, 17 Oct 2013 20:58:01 +0900
Subject: [PATCH] add requirement section to READMEN

---
 README.md | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/README.md b/README.md
index 69dd77fb..59007d6e 100644
--- a/README.md
+++ b/README.md
@@ -28,6 +28,16 @@
 	
 In the default option, when `make` command is called without arguments, it builds the binary and right after that dropped into the picrin interactive shell (REPL).
 
+## Requirement
+
+picrin scheme depends on some external libraries to build the binary:
+
+- bison
+- yacc
+- make
+- gcc
+- readline
+
 ## Authors
 
 Yuichi Nishiwaki (yuichi.nishiwaki at gmail.com)