85 lines
3.0 KiB
CMake
85 lines
3.0 KiB
CMake
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# - Try to find Eigen3 lib
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#
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# This module supports requiring a minimum version, e.g. you can do
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# find_package(Eigen3 3.1.2)
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# to require version 3.1.2 or newer of Eigen3.
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#
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# Once done this will define
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#
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# EIGEN3_FOUND - system has eigen lib with correct version
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# EIGEN3_INCLUDE_DIR - the eigen include directory
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# EIGEN3_VERSION - eigen version
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# Copyright (c) 2006, 2007 Montel Laurent, <montel@kde.org>
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# Copyright (c) 2008, 2009 Gael Guennebaud, <g.gael@free.fr>
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# Copyright (c) 2009 Benoit Jacob <jacob.benoit.1@gmail.com>
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# Redistribution and use is allowed according to the terms of the 2-clause BSD license.
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include(FindPackageHandleStandardArgs)
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if(NOT Eigen3_FIND_VERSION)
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if(NOT Eigen3_FIND_VERSION_MAJOR)
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set(Eigen3_FIND_VERSION_MAJOR 2)
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endif(NOT Eigen3_FIND_VERSION_MAJOR)
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if(NOT Eigen3_FIND_VERSION_MINOR)
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set(Eigen3_FIND_VERSION_MINOR 91)
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endif(NOT Eigen3_FIND_VERSION_MINOR)
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if(NOT Eigen3_FIND_VERSION_PATCH)
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set(Eigen3_FIND_VERSION_PATCH 0)
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endif(NOT Eigen3_FIND_VERSION_PATCH)
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set(Eigen3_FIND_VERSION "${Eigen3_FIND_VERSION_MAJOR}.${Eigen3_FIND_VERSION_MINOR}.${Eigen3_FIND_VERSION_PATCH}")
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endif(NOT Eigen3_FIND_VERSION)
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macro(_eigen3_get_version)
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file(READ "${EIGEN3_INCLUDE_DIR}/Eigen/src/Core/util/Macros.h" _eigen3_version_header)
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string(REGEX MATCH "define[ \t]+EIGEN_WORLD_VERSION[ \t]+([0-9]+)" _eigen3_world_version_match "${_eigen3_version_header}")
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set(EIGEN3_WORLD_VERSION "${CMAKE_MATCH_1}")
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string(REGEX MATCH "define[ \t]+EIGEN_MAJOR_VERSION[ \t]+([0-9]+)" _eigen3_major_version_match "${_eigen3_version_header}")
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set(EIGEN3_MAJOR_VERSION "${CMAKE_MATCH_1}")
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string(REGEX MATCH "define[ \t]+EIGEN_MINOR_VERSION[ \t]+([0-9]+)" _eigen3_minor_version_match "${_eigen3_version_header}")
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set(EIGEN3_MINOR_VERSION "${CMAKE_MATCH_1}")
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set(EIGEN3_VERSION ${EIGEN3_WORLD_VERSION}.${EIGEN3_MAJOR_VERSION}.${EIGEN3_MINOR_VERSION})
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endmacro(_eigen3_get_version)
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if (EIGEN3_INCLUDE_DIR)
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if (EXISTS ${EIGEN3_INCLUDE_DIR}/signature_of_eigen3_matrix_library)
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# in cache already and valid
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_eigen3_get_version()
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set(EIGEN3_FOUND ${EIGEN3_VERSION_OK})
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find_package_handle_standard_args(Eigen3
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REQUIRED_VARS EIGEN3_INCLUDE_DIR
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VERSION_VAR EIGEN3_VERSION)
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else()
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message(STATUS "Eigen3 path specified in cmake variable EIGEN3_INCLUDE_DIR is "
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"set to ${EIGEN3_INCLUDE_DIR}, but that path does not contains the file "
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"signature_of_eigen3_matrix_library and is considered as invalid.")
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endif()
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else (EIGEN3_INCLUDE_DIR)
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find_path(EIGEN3_INCLUDE_DIR NAMES signature_of_eigen3_matrix_library
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HINTS ENV EIGEN3_INC_DIR
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ENV EIGEN3_DIR
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PATHS ${KDE4_INCLUDE_DIR}
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PATH_SUFFIXES include eigen3 eigen
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DOC "Directory containing the Eigen3 header files"
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)
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if(EIGEN3_INCLUDE_DIR)
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_eigen3_get_version()
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endif(EIGEN3_INCLUDE_DIR)
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find_package_handle_standard_args(Eigen3
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REQUIRED_VARS EIGEN3_INCLUDE_DIR
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VERSION_VAR EIGEN3_VERSION)
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endif(EIGEN3_INCLUDE_DIR)
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