From 65724def7027c028b39dfde3aa20bbb4807e1c5f Mon Sep 17 00:00:00 2001
From: Benoit Jacob <jacob.benoit.1@gmail.com>
Date: Thu, 20 Aug 2009 12:27:01 -0400
Subject: [PATCH] more useful error message about the including order

---
 Eigen/StdVector | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Eigen/StdVector b/Eigen/StdVector
index eedea750e..1cc7984e7 100644
--- a/Eigen/StdVector
+++ b/Eigen/StdVector
@@ -2,7 +2,7 @@
 #define EIGEN_STDVECTOR_MODULE_H
 
 #if defined(_GLIBCXX_VECTOR) || defined(_VECTOR_)
-#error you must include Eigen/StdVector before std::vector
+#error you must include <Eigen/StdVector> before <vector>. Also note that <Eigen/Sparse> includes <vector>, so it must be included after <Eigen/StdVector> too.
 #endif                                                    
 
 #ifndef EIGEN_GNUC_AT_LEAST