FindEigen3.cmake (3509B)
1 # - Try to find Eigen3 lib 2 # 3 # This module supports requiring a minimum version, e.g. you can do 4 # find_package(Eigen3 3.1.2) 5 # to require version 3.1.2 or newer of Eigen3. 6 # 7 # Once done this will define 8 # 9 # EIGEN3_FOUND - system has eigen lib with correct version 10 # EIGEN3_INCLUDE_DIR - the eigen include directory 11 # EIGEN3_VERSION - eigen version 12 # 13 # and the following imported target: 14 # 15 # Eigen3::Eigen - The header-only Eigen library 16 # 17 # This module reads hints about search locations from 18 # the following environment variables: 19 # 20 # EIGEN3_ROOT 21 # EIGEN3_ROOT_DIR 22 23 # Copyright (c) 2006, 2007 Montel Laurent, <montel@kde.org> 24 # Copyright (c) 2008, 2009 Gael Guennebaud, <g.gael@free.fr> 25 # Copyright (c) 2009 Benoit Jacob <jacob.benoit.1@gmail.com> 26 # Redistribution and use is allowed according to the terms of the 2-clause BSD license. 27 28 if(NOT Eigen3_FIND_VERSION) 29 if(NOT Eigen3_FIND_VERSION_MAJOR) 30 set(Eigen3_FIND_VERSION_MAJOR 2) 31 endif() 32 if(NOT Eigen3_FIND_VERSION_MINOR) 33 set(Eigen3_FIND_VERSION_MINOR 91) 34 endif() 35 if(NOT Eigen3_FIND_VERSION_PATCH) 36 set(Eigen3_FIND_VERSION_PATCH 0) 37 endif() 38 39 set(Eigen3_FIND_VERSION "${Eigen3_FIND_VERSION_MAJOR}.${Eigen3_FIND_VERSION_MINOR}.${Eigen3_FIND_VERSION_PATCH}") 40 endif() 41 42 macro(_eigen3_check_version) 43 file(READ "${EIGEN3_INCLUDE_DIR}/Eigen/src/Core/util/Macros.h" _eigen3_version_header) 44 45 string(REGEX MATCH "define[ \t]+EIGEN_WORLD_VERSION[ \t]+([0-9]+)" _eigen3_world_version_match "${_eigen3_version_header}") 46 set(EIGEN3_WORLD_VERSION "${CMAKE_MATCH_1}") 47 string(REGEX MATCH "define[ \t]+EIGEN_MAJOR_VERSION[ \t]+([0-9]+)" _eigen3_major_version_match "${_eigen3_version_header}") 48 set(EIGEN3_MAJOR_VERSION "${CMAKE_MATCH_1}") 49 string(REGEX MATCH "define[ \t]+EIGEN_MINOR_VERSION[ \t]+([0-9]+)" _eigen3_minor_version_match "${_eigen3_version_header}") 50 set(EIGEN3_MINOR_VERSION "${CMAKE_MATCH_1}") 51 52 set(EIGEN3_VERSION ${EIGEN3_WORLD_VERSION}.${EIGEN3_MAJOR_VERSION}.${EIGEN3_MINOR_VERSION}) 53 if(${EIGEN3_VERSION} VERSION_LESS ${Eigen3_FIND_VERSION}) 54 set(EIGEN3_VERSION_OK FALSE) 55 else() 56 set(EIGEN3_VERSION_OK TRUE) 57 endif() 58 59 if(NOT EIGEN3_VERSION_OK) 60 61 message(STATUS "Eigen3 version ${EIGEN3_VERSION} found in ${EIGEN3_INCLUDE_DIR}, " 62 "but at least version ${Eigen3_FIND_VERSION} is required") 63 endif() 64 endmacro() 65 66 if (EIGEN3_INCLUDE_DIR) 67 68 # in cache already 69 _eigen3_check_version() 70 set(EIGEN3_FOUND ${EIGEN3_VERSION_OK}) 71 set(Eigen3_FOUND ${EIGEN3_VERSION_OK}) 72 73 else () 74 75 # search first if an Eigen3Config.cmake is available in the system, 76 # if successful this would set EIGEN3_INCLUDE_DIR and the rest of 77 # the script will work as usual 78 find_package(Eigen3 ${Eigen3_FIND_VERSION} NO_MODULE QUIET) 79 80 if(NOT EIGEN3_INCLUDE_DIR) 81 find_path(EIGEN3_INCLUDE_DIR NAMES signature_of_eigen3_matrix_library 82 HINTS 83 ENV EIGEN3_ROOT 84 ENV EIGEN3_ROOT_DIR 85 PATHS 86 ${CMAKE_INSTALL_PREFIX}/include 87 ${KDE4_INCLUDE_DIR} 88 PATH_SUFFIXES eigen3 eigen 89 ) 90 endif() 91 92 if(EIGEN3_INCLUDE_DIR) 93 _eigen3_check_version() 94 endif() 95 96 include(FindPackageHandleStandardArgs) 97 find_package_handle_standard_args(Eigen3 DEFAULT_MSG EIGEN3_INCLUDE_DIR EIGEN3_VERSION_OK) 98 99 mark_as_advanced(EIGEN3_INCLUDE_DIR) 100 101 endif() 102 103 if(EIGEN3_FOUND AND NOT TARGET Eigen3::Eigen) 104 add_library(Eigen3::Eigen INTERFACE IMPORTED) 105 set_target_properties(Eigen3::Eigen PROPERTIES 106 INTERFACE_INCLUDE_DIRECTORIES "${EIGEN3_INCLUDE_DIR}") 107 endif()