From 36cd25551df8dbff2b2dc52a77fdc031a4a70942 Mon Sep 17 00:00:00 2001
From: erw <erw@microsoft.com>
Date: Wed, 22 Jul 2015 16:53:54 -0700
Subject: [PATCH] Fix a minor bug for buildinfo.h when CUDA_PATH is not defined

---
 MachineLearning/CNTK/prebuild.bat | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/MachineLearning/CNTK/prebuild.bat b/MachineLearning/CNTK/prebuild.bat
index 0af9f3653..1b9c0a3bf 100644
--- a/MachineLearning/CNTK/prebuild.bat
+++ b/MachineLearning/CNTK/prebuild.bat
@@ -27,8 +27,11 @@ set a=%~dp0
 set buildpath="%a:\=\\%"
 echo #define _BUILDPATH_    %buildpath%     >> buildinfo.h$$
 
-set cuda_path="%CUDA_PATH:\=\\%"
-echo #define _CUDA_PATH_    %cuda_path%     >> buildinfo.h$$
+if "%cuda_path%" == "" ( 
+    echo #define _CUDA_PATH_    "NOT_DEFINED"     >> buildinfo.h$$  
+    ) else (
+        echo #define _CUDA_PATH_    "%cuda_path:\=\\%" >> buildinfo.h$$
+    )
 
 echo #endif >> buildinfo.h$$