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05e516bb4a
Since the package is named Eigen3 (in mixed case), we should allow for the variable to be named this way, too.
98 lines
3.4 KiB
CMake
98 lines
3.4 KiB
CMake
# - 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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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}.${Eigen3_FIND_VERSION_PATCH}")
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endif(NOT Eigen3_FIND_VERSION)
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macro(_eigen3_check_version)
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file(READ "${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}.${EIGEN3_MINOR_VERSION})
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if(${EIGEN3_VERSION} VERSION_LESS ${Eigen3_FIND_VERSION})
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set(EIGEN3_VERSION_OK FALSE)
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else(${EIGEN3_VERSION} VERSION_LESS ${Eigen3_FIND_VERSION})
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set(EIGEN3_VERSION_OK TRUE)
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endif(${EIGEN3_VERSION} VERSION_LESS ${Eigen3_FIND_VERSION})
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if(NOT EIGEN3_VERSION_OK)
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message(STATUS "Eigen3 version ${EIGEN3_VERSION} found in ${EIGEN3_INCLUDE_DIR}, "
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"but at least version ${Eigen3_FIND_VERSION} is required")
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endif(NOT EIGEN3_VERSION_OK)
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endmacro(_eigen3_check_version)
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if (EIGEN3_INCLUDE_DIR)
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# in cache already
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_eigen3_check_version()
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set(EIGEN3_FOUND ${EIGEN3_VERSION_OK})
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else (EIGEN3_INCLUDE_DIR)
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# allow Eigen3_ROOT to be used in addition to EIGEN3_ROOT
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if (Eigen3_ROOT)
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set (EIGEN3_ROOT "${Eigen3_ROOT}")
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endif (Eigen3_ROOT)
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# if the _ROOT is specified, then look *only* there; don't allow any
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# other version to be swapped in to substitute; if not specified, then
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# go search usual locations
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if (EIGEN3_ROOT)
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find_path (EIGEN3_INCLUDE_DIR
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NAMES signature_of_eigen3_matrix_library
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PATHS ${EIGEN3_ROOT}
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NO_DEFAULT_PATH
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)
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else (EIGEN3_ROOT)
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find_path(EIGEN3_INCLUDE_DIR NAMES signature_of_eigen3_matrix_library
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PATHS
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${CMAKE_INSTALL_PREFIX}/include
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${KDE4_INCLUDE_DIR}
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PATH_SUFFIXES eigen3 eigen
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)
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endif (EIGEN3_ROOT)
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if(EIGEN3_INCLUDE_DIR)
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_eigen3_check_version()
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endif(EIGEN3_INCLUDE_DIR)
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include(FindPackageHandleStandardArgs)
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find_package_handle_standard_args(Eigen3 DEFAULT_MSG EIGEN3_INCLUDE_DIR EIGEN3_VERSION_OK)
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mark_as_advanced(EIGEN3_INCLUDE_DIR)
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endif(EIGEN3_INCLUDE_DIR)
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