From ecf24b1671041d4243270fd1ec151eac8f9575aa Mon Sep 17 00:00:00 2001
From: Brad King <brad.king@kitware.com>
Date: Mon, 19 Nov 2007 13:42:54 -0500
Subject: [PATCH] BUG: Always return positive integers to the OS on error. 
 Windows error encoding is confused by negative return values.

---
 Source/cmakemain.cxx | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/Source/cmakemain.cxx b/Source/cmakemain.cxx
index 9e81a42a1..8d38f70f5 100644
--- a/Source/cmakemain.cxx
+++ b/Source/cmakemain.cxx
@@ -487,6 +487,16 @@ int do_cmake(int ac, char** av)
         }
       }
     }
-  return res;
+
+  // Always return a non-negative value.  Windows tools do not always
+  // interpret negative return values as errors.
+  if(res != 0)
+    {
+    return 1;
+    }
+  else
+    {
+    return 0;
+    }
 }