From 3884308da7f460ccb810a0bd7b10d38c052b2925 Mon Sep 17 00:00:00 2001
From: Benoit Jacob <jacob.benoit.1@gmail.com>
Date: Tue, 22 Feb 2011 08:40:37 -0500
Subject: [PATCH] __attribute__((flatten)) seems to be recognized by neither
 clang nor icc despite these compilers defining __GNUC__.

---
 Eigen/src/Core/util/Macros.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Eigen/src/Core/util/Macros.h b/Eigen/src/Core/util/Macros.h
index 7bb8cf434..5088099fb 100644
--- a/Eigen/src/Core/util/Macros.h
+++ b/Eigen/src/Core/util/Macros.h
@@ -142,7 +142,7 @@
 #define EIGEN_ALWAYS_INLINE_ATTRIB
 #endif
 
-#if EIGEN_GNUC_AT_LEAST(4,1)
+#if EIGEN_GNUC_AT_LEAST(4,1) && !defined(__clang__) && !defined(__intel_compiler)
 #define EIGEN_FLATTEN_ATTRIB __attribute__((flatten))
 #else
 #define EIGEN_FLATTEN_ATTRIB