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thirdparty/Sophus/cmake_modules/FindEigen3.cmake

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+# - Try to find Eigen3 lib
+# Once done this will define
+#
+#  EIGEN3_FOUND - system has eigen lib
+#  EIGEN3_INCLUDE_DIR - the eigen include directory
+
+# Copyright (c) 2006, 2007 Montel Laurent, <montel@kde.org>
+# Redistribution and use is allowed according to the terms of the BSD license.
+# For details see the accompanying COPYING-CMAKE-SCRIPTS file.
+
+if( EIGEN3_INCLUDE_DIR )
+    # in cache already
+    set( EIGEN3_FOUND TRUE )
+else (EIGEN3_INCLUDE_DIR)
+    find_path( EIGEN3_INCLUDE_DIR NAMES Eigen/Core
+        PATH_SUFFIXES eigen3/
+        HINTS
+        ${INCLUDE_INSTALL_DIR}
+        /usr/local/include
+        ${KDE4_INCLUDE_DIR}
+        )
+    include( FindPackageHandleStandardArgs )
+    find_package_handle_standard_args( Eigen3 DEFAULT_MSG EIGEN3_INCLUDE_DIR )   
+    mark_as_advanced( EIGEN3_INCLUDE_DIR )
+endif(EIGEN3_INCLUDE_DIR)
+