Squashed 'third_party/eigen/' content from commit 61d72f6
Change-Id: Iccc90fa0b55ab44037f018046d2fcffd90d9d025
git-subtree-dir: third_party/eigen
git-subtree-split: 61d72f6383cfa842868c53e30e087b0258177257
diff --git a/cmake/FindEigen2.cmake b/cmake/FindEigen2.cmake
new file mode 100644
index 0000000..a834b88
--- /dev/null
+++ b/cmake/FindEigen2.cmake
@@ -0,0 +1,80 @@
+# - Try to find Eigen2 lib
+#
+# This module supports requiring a minimum version, e.g. you can do
+# find_package(Eigen2 2.0.3)
+# to require version 2.0.3 to newer of Eigen2.
+#
+# Once done this will define
+#
+# EIGEN2_FOUND - system has eigen lib with correct version
+# EIGEN2_INCLUDE_DIR - the eigen include directory
+# EIGEN2_VERSION - eigen version
+
+# Copyright (c) 2006, 2007 Montel Laurent, <montel@kde.org>
+# Copyright (c) 2008, 2009 Gael Guennebaud, <g.gael@free.fr>
+# Redistribution and use is allowed according to the terms of the BSD license.
+
+if(NOT Eigen2_FIND_VERSION)
+ if(NOT Eigen2_FIND_VERSION_MAJOR)
+ set(Eigen2_FIND_VERSION_MAJOR 2)
+ endif(NOT Eigen2_FIND_VERSION_MAJOR)
+ if(NOT Eigen2_FIND_VERSION_MINOR)
+ set(Eigen2_FIND_VERSION_MINOR 0)
+ endif(NOT Eigen2_FIND_VERSION_MINOR)
+ if(NOT Eigen2_FIND_VERSION_PATCH)
+ set(Eigen2_FIND_VERSION_PATCH 0)
+ endif(NOT Eigen2_FIND_VERSION_PATCH)
+
+ set(Eigen2_FIND_VERSION "${Eigen2_FIND_VERSION_MAJOR}.${Eigen2_FIND_VERSION_MINOR}.${Eigen2_FIND_VERSION_PATCH}")
+endif(NOT Eigen2_FIND_VERSION)
+
+macro(_eigen2_check_version)
+ file(READ "${EIGEN2_INCLUDE_DIR}/Eigen/src/Core/util/Macros.h" _eigen2_version_header)
+
+ string(REGEX MATCH "define[ \t]+EIGEN_WORLD_VERSION[ \t]+([0-9]+)" _eigen2_world_version_match "${_eigen2_version_header}")
+ set(EIGEN2_WORLD_VERSION "${CMAKE_MATCH_1}")
+ string(REGEX MATCH "define[ \t]+EIGEN_MAJOR_VERSION[ \t]+([0-9]+)" _eigen2_major_version_match "${_eigen2_version_header}")
+ set(EIGEN2_MAJOR_VERSION "${CMAKE_MATCH_1}")
+ string(REGEX MATCH "define[ \t]+EIGEN_MINOR_VERSION[ \t]+([0-9]+)" _eigen2_minor_version_match "${_eigen2_version_header}")
+ set(EIGEN2_MINOR_VERSION "${CMAKE_MATCH_1}")
+
+ set(EIGEN2_VERSION ${EIGEN2_WORLD_VERSION}.${EIGEN2_MAJOR_VERSION}.${EIGEN2_MINOR_VERSION})
+ if((${EIGEN2_WORLD_VERSION} NOTEQUAL 2) OR (${EIGEN2_MAJOR_VERSION} GREATER 10) OR (${EIGEN2_VERSION} VERSION_LESS ${Eigen2_FIND_VERSION}))
+ set(EIGEN2_VERSION_OK FALSE)
+ else()
+ set(EIGEN2_VERSION_OK TRUE)
+ endif()
+
+ if(NOT EIGEN2_VERSION_OK)
+
+ message(STATUS "Eigen2 version ${EIGEN2_VERSION} found in ${EIGEN2_INCLUDE_DIR}, "
+ "but at least version ${Eigen2_FIND_VERSION} is required")
+ endif(NOT EIGEN2_VERSION_OK)
+endmacro(_eigen2_check_version)
+
+if (EIGEN2_INCLUDE_DIR)
+
+ # in cache already
+ _eigen2_check_version()
+ set(EIGEN2_FOUND ${EIGEN2_VERSION_OK})
+
+else (EIGEN2_INCLUDE_DIR)
+
+find_path(EIGEN2_INCLUDE_DIR NAMES Eigen/Core
+ PATHS
+ ${INCLUDE_INSTALL_DIR}
+ ${KDE4_INCLUDE_DIR}
+ PATH_SUFFIXES eigen2
+ )
+
+if(EIGEN2_INCLUDE_DIR)
+ _eigen2_check_version()
+endif(EIGEN2_INCLUDE_DIR)
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(Eigen2 DEFAULT_MSG EIGEN2_INCLUDE_DIR EIGEN2_VERSION_OK)
+
+mark_as_advanced(EIGEN2_INCLUDE_DIR)
+
+endif(EIGEN2_INCLUDE_DIR)
+