From f41c54e49d6bee920862898611f4688bd09efa2f Mon Sep 17 00:00:00 2001
From: Shuotian Cheng <stcheng_89@hotmail.com>
Date: Mon, 2 May 2016 15:50:48 -0700
Subject: [PATCH] doc: Updating environmental variable for build

Add DEB_SAI_FLAVOR.
---
 README.md | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 2bf3cf5c4c46..93886d6a11b0 100644
--- a/README.md
+++ b/README.md
@@ -47,10 +47,14 @@ Install prerequisite packages:
 
     sudo apt-get install libswsscommon libswsscommon-dev
 
+Before compiling, you will need to set an environmental variable to indicate which 'SAI flavor' you are using.
+
+    export DEB_SAI_FLAVOR=[FLAVOR]
+
 You can compile and install from source using:
 
     ./autogen.sh
-    ./configure
+    ./configure --with-sai=$(DEB_SAI_FLAVOR)
     make && sudo make install
 
 You can also build a debian package using: