Squashed 'third_party/eigen/' content from commit 61d72f6

Change-Id: Iccc90fa0b55ab44037f018046d2fcffd90d9d025
git-subtree-dir: third_party/eigen
git-subtree-split: 61d72f6383cfa842868c53e30e087b0258177257
diff --git a/lapack/lapack_common.h b/lapack/lapack_common.h
new file mode 100644
index 0000000..e558c14
--- /dev/null
+++ b/lapack/lapack_common.h
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+// This file is part of Eigen, a lightweight C++ template library
+// for linear algebra.
+//
+// Copyright (C) 2010-2011 Gael Guennebaud <gael.guennebaud@inria.fr>
+//
+// This Source Code Form is subject to the terms of the Mozilla
+// Public License v. 2.0. If a copy of the MPL was not distributed
+// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+#ifndef EIGEN_LAPACK_COMMON_H
+#define EIGEN_LAPACK_COMMON_H
+
+#include "../blas/common.h"
+
+#define EIGEN_LAPACK_FUNC(FUNC,ARGLIST)               \
+  extern "C" { int EIGEN_BLAS_FUNC(FUNC) ARGLIST; }   \
+  int EIGEN_BLAS_FUNC(FUNC) ARGLIST
+
+typedef Eigen::Map<Eigen::Transpositions<Eigen::Dynamic,Eigen::Dynamic,int> > PivotsType;
+
+
+
+#endif // EIGEN_LAPACK_COMMON_H