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# Copyright (c) 2006, 2007 Montel Laurent, <montel@kde.org> 14# Copyright (c) 2008, 2009 Gael Guennebaud, <g.gael@free.fr> 15# Copyright (c) 2009 Benoit Jacob <jacob.benoit.1@gmail.com> 16# Redistribution and use is allowed according to the terms of the 2-clause BSD license. 17 18if(NOT Eigen3_FIND_VERSION) 19 if(NOT Eigen3_FIND_VERSION_MAJOR) 20 set(Eigen3_FIND_VERSION_MAJOR 2) 21 endif(NOT Eigen3_FIND_VERSION_MAJOR) 22 if(NOT Eigen3_FIND_VERSION_MINOR) 23 set(Eigen3_FIND_VERSION_MINOR 91) 24 endif(NOT Eigen3_FIND_VERSION_MINOR) 25 if(NOT Eigen3_FIND_VERSION_PATCH) 26 set(Eigen3_FIND_VERSION_PATCH 0) 27 endif(NOT Eigen3_FIND_VERSION_PATCH) 28 29 set(Eigen3_FIND_VERSION 30 "${Eigen3_FIND_VERSION_MAJOR}.${Eigen3_FIND_VERSION_MINOR}.${Eigen3_FIND_VERSION_PATCH}") 31endif(NOT Eigen3_FIND_VERSION) 32 33macro(_eigen3_check_version) 34 file(READ "${EIGEN3_INCLUDE_DIR}/Eigen/src/Core/util/Macros.h" _eigen3_version_header) 35 36 string(REGEX MATCH "define[ \t]+EIGEN_WORLD_VERSION[ \t]+([0-9]+)" _eigen3_world_version_match 37 "${_eigen3_version_header}") 38 set(EIGEN3_WORLD_VERSION "${CMAKE_MATCH_1}") 39 string(REGEX MATCH "define[ \t]+EIGEN_MAJOR_VERSION[ \t]+([0-9]+)" _eigen3_major_version_match 40 "${_eigen3_version_header}") 41 set(EIGEN3_MAJOR_VERSION "${CMAKE_MATCH_1}") 42 string(REGEX MATCH "define[ \t]+EIGEN_MINOR_VERSION[ \t]+([0-9]+)" _eigen3_minor_version_match 43 "${_eigen3_version_header}") 44 set(EIGEN3_MINOR_VERSION "${CMAKE_MATCH_1}") 45 46 set(EIGEN3_VERSION ${EIGEN3_WORLD_VERSION}.${EIGEN3_MAJOR_VERSION}.${EIGEN3_MINOR_VERSION}) 47 if(${EIGEN3_VERSION} VERSION_LESS ${Eigen3_FIND_VERSION}) 48 set(EIGEN3_VERSION_OK FALSE) 49 else(${EIGEN3_VERSION} VERSION_LESS ${Eigen3_FIND_VERSION}) 50 set(EIGEN3_VERSION_OK TRUE) 51 endif(${EIGEN3_VERSION} VERSION_LESS ${Eigen3_FIND_VERSION}) 52 53 if(NOT EIGEN3_VERSION_OK) 54 55 message(STATUS "Eigen3 version ${EIGEN3_VERSION} found in ${EIGEN3_INCLUDE_DIR}, " 56 "but at least version ${Eigen3_FIND_VERSION} is required") 57 endif(NOT EIGEN3_VERSION_OK) 58endmacro(_eigen3_check_version) 59 60if(EIGEN3_INCLUDE_DIR) 61 62 # in cache already 63 _eigen3_check_version() 64 set(EIGEN3_FOUND ${EIGEN3_VERSION_OK}) 65 66else(EIGEN3_INCLUDE_DIR) 67 if(NOT DEFINED KDE4_INCLUDE_DIR) 68 set(KDE4_INCLUDE_DIR "") 69 endif() 70 71 find_path( 72 EIGEN3_INCLUDE_DIR 73 NAMES signature_of_eigen3_matrix_library 74 PATHS ${CMAKE_INSTALL_PREFIX}/include ${KDE4_INCLUDE_DIR} 75 PATH_SUFFIXES eigen3 eigen) 76 77 if(EIGEN3_INCLUDE_DIR) 78 _eigen3_check_version() 79 endif(EIGEN3_INCLUDE_DIR) 80 81 include(FindPackageHandleStandardArgs) 82 find_package_handle_standard_args(Eigen3 DEFAULT_MSG EIGEN3_INCLUDE_DIR EIGEN3_VERSION_OK) 83 84 mark_as_advanced(EIGEN3_INCLUDE_DIR) 85 86endif(EIGEN3_INCLUDE_DIR) 87