From d9232a96aa03444879d855ab86e43d8fb4369c9d Mon Sep 17 00:00:00 2001
From: Jitse Niesen <jitse@maths.leeds.ac.uk>
Date: Wed, 4 May 2011 14:28:01 +0100
Subject: [PATCH] Bail out if preprocessor symbol Success is defined (bug
 #253).

---
 Eigen/src/Core/util/Constants.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Eigen/src/Core/util/Constants.h b/Eigen/src/Core/util/Constants.h
index 37f18f2b4..c3dd3a09d 100644
--- a/Eigen/src/Core/util/Constants.h
+++ b/Eigen/src/Core/util/Constants.h
@@ -371,6 +371,10 @@ enum QRPreconditioners {
   FullPivHouseholderQRPreconditioner
 };
 
+#ifdef Success
+#error The preprocessor symbol 'Success' is defined, possibly by the X11 header file X.h
+#endif
+
 /** \ingroups enums
   * Enum for reporting the status of a computation. */
 enum ComputationInfo {