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2025.09.22_cpp_with_eigen_package/Eigen/UmfPackSupport

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+// This file is part of Eigen, a lightweight C++ template library
+// for linear algebra.
+//
+// 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_UMFPACKSUPPORT_MODULE_H
+#define EIGEN_UMFPACKSUPPORT_MODULE_H
+
+#include "SparseCore"
+
+#include "src/Core/util/DisableStupidWarnings.h"
+
+extern "C" {
+#include <umfpack.h>
+}
+
+/** \ingroup Support_modules
+ * \defgroup UmfPackSupport_Module UmfPackSupport module
+ *
+ * This module provides an interface to the UmfPack library which is part of the <a
+ * href="http://www.suitesparse.com">suitesparse</a> package. It provides the following factorization class:
+ * - class UmfPackLU: a multifrontal sequential LU factorization.
+ *
+ * \code
+ * #include <Eigen/UmfPackSupport>
+ * \endcode
+ *
+ * In order to use this module, the umfpack headers must be accessible from the include paths, and your binary must be
+ * linked to the umfpack library and its dependencies. The dependencies depend on how umfpack has been compiled. For a
+ * cmake based project, you can use our FindUmfPack.cmake module to help you in this task.
+ *
+ */
+
+// IWYU pragma: begin_exports
+#include "src/UmfPackSupport/UmfPackSupport.h"
+// IWYU pragma: endexports
+
+#include "src/Core/util/ReenableStupidWarnings.h"
+
+#endif  // EIGEN_UMFPACKSUPPORT_MODULE_H