diff --git a/README.md b/README.md
index 023cb40..3185ac3 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,7 @@
 # am335x
 
-油色谱 linux版本
\ No newline at end of file
+油色谱 linux版本
+
+编译环境
+ubuntu 14.04
+https://releases.linaro.org/components/toolchain/binaries/5.5-2017.10/arm-linux-gnueabihf/gcc-linaro-5.5.0-2017.10-x86_64_arm-linux-gnueabihf.tar.xz