111986Sandreas.sandberg@arm.com# - Try to find Eigen3 lib
211986Sandreas.sandberg@arm.com#
311986Sandreas.sandberg@arm.com# This module supports requiring a minimum version, e.g. you can do
411986Sandreas.sandberg@arm.com#   find_package(Eigen3 3.1.2)
511986Sandreas.sandberg@arm.com# to require version 3.1.2 or newer of Eigen3.
611986Sandreas.sandberg@arm.com#
711986Sandreas.sandberg@arm.com# Once done this will define
811986Sandreas.sandberg@arm.com#
911986Sandreas.sandberg@arm.com#  EIGEN3_FOUND - system has eigen lib with correct version
1011986Sandreas.sandberg@arm.com#  EIGEN3_INCLUDE_DIR - the eigen include directory
1111986Sandreas.sandberg@arm.com#  EIGEN3_VERSION - eigen version
1211986Sandreas.sandberg@arm.com
1311986Sandreas.sandberg@arm.com# Copyright (c) 2006, 2007 Montel Laurent, <montel@kde.org>
1411986Sandreas.sandberg@arm.com# Copyright (c) 2008, 2009 Gael Guennebaud, <g.gael@free.fr>
1511986Sandreas.sandberg@arm.com# Copyright (c) 2009 Benoit Jacob <jacob.benoit.1@gmail.com>
1611986Sandreas.sandberg@arm.com# Redistribution and use is allowed according to the terms of the 2-clause BSD license.
1711986Sandreas.sandberg@arm.com
1811986Sandreas.sandberg@arm.comif(NOT Eigen3_FIND_VERSION)
1911986Sandreas.sandberg@arm.com  if(NOT Eigen3_FIND_VERSION_MAJOR)
2011986Sandreas.sandberg@arm.com    set(Eigen3_FIND_VERSION_MAJOR 2)
2111986Sandreas.sandberg@arm.com  endif(NOT Eigen3_FIND_VERSION_MAJOR)
2211986Sandreas.sandberg@arm.com  if(NOT Eigen3_FIND_VERSION_MINOR)
2311986Sandreas.sandberg@arm.com    set(Eigen3_FIND_VERSION_MINOR 91)
2411986Sandreas.sandberg@arm.com  endif(NOT Eigen3_FIND_VERSION_MINOR)
2511986Sandreas.sandberg@arm.com  if(NOT Eigen3_FIND_VERSION_PATCH)
2611986Sandreas.sandberg@arm.com    set(Eigen3_FIND_VERSION_PATCH 0)
2711986Sandreas.sandberg@arm.com  endif(NOT Eigen3_FIND_VERSION_PATCH)
2811986Sandreas.sandberg@arm.com
2911986Sandreas.sandberg@arm.com  set(Eigen3_FIND_VERSION "${Eigen3_FIND_VERSION_MAJOR}.${Eigen3_FIND_VERSION_MINOR}.${Eigen3_FIND_VERSION_PATCH}")
3011986Sandreas.sandberg@arm.comendif(NOT Eigen3_FIND_VERSION)
3111986Sandreas.sandberg@arm.com
3211986Sandreas.sandberg@arm.commacro(_eigen3_check_version)
3311986Sandreas.sandberg@arm.com  file(READ "${EIGEN3_INCLUDE_DIR}/Eigen/src/Core/util/Macros.h" _eigen3_version_header)
3411986Sandreas.sandberg@arm.com
3511986Sandreas.sandberg@arm.com  string(REGEX MATCH "define[ \t]+EIGEN_WORLD_VERSION[ \t]+([0-9]+)" _eigen3_world_version_match "${_eigen3_version_header}")
3611986Sandreas.sandberg@arm.com  set(EIGEN3_WORLD_VERSION "${CMAKE_MATCH_1}")
3711986Sandreas.sandberg@arm.com  string(REGEX MATCH "define[ \t]+EIGEN_MAJOR_VERSION[ \t]+([0-9]+)" _eigen3_major_version_match "${_eigen3_version_header}")
3811986Sandreas.sandberg@arm.com  set(EIGEN3_MAJOR_VERSION "${CMAKE_MATCH_1}")
3911986Sandreas.sandberg@arm.com  string(REGEX MATCH "define[ \t]+EIGEN_MINOR_VERSION[ \t]+([0-9]+)" _eigen3_minor_version_match "${_eigen3_version_header}")
4011986Sandreas.sandberg@arm.com  set(EIGEN3_MINOR_VERSION "${CMAKE_MATCH_1}")
4111986Sandreas.sandberg@arm.com
4211986Sandreas.sandberg@arm.com  set(EIGEN3_VERSION ${EIGEN3_WORLD_VERSION}.${EIGEN3_MAJOR_VERSION}.${EIGEN3_MINOR_VERSION})
4311986Sandreas.sandberg@arm.com  if(${EIGEN3_VERSION} VERSION_LESS ${Eigen3_FIND_VERSION})
4411986Sandreas.sandberg@arm.com    set(EIGEN3_VERSION_OK FALSE)
4511986Sandreas.sandberg@arm.com  else(${EIGEN3_VERSION} VERSION_LESS ${Eigen3_FIND_VERSION})
4611986Sandreas.sandberg@arm.com    set(EIGEN3_VERSION_OK TRUE)
4711986Sandreas.sandberg@arm.com  endif(${EIGEN3_VERSION} VERSION_LESS ${Eigen3_FIND_VERSION})
4811986Sandreas.sandberg@arm.com
4911986Sandreas.sandberg@arm.com  if(NOT EIGEN3_VERSION_OK)
5011986Sandreas.sandberg@arm.com
5111986Sandreas.sandberg@arm.com    message(STATUS "Eigen3 version ${EIGEN3_VERSION} found in ${EIGEN3_INCLUDE_DIR}, "
5211986Sandreas.sandberg@arm.com                   "but at least version ${Eigen3_FIND_VERSION} is required")
5311986Sandreas.sandberg@arm.com  endif(NOT EIGEN3_VERSION_OK)
5411986Sandreas.sandberg@arm.comendmacro(_eigen3_check_version)
5511986Sandreas.sandberg@arm.com
5611986Sandreas.sandberg@arm.comif (EIGEN3_INCLUDE_DIR)
5711986Sandreas.sandberg@arm.com
5811986Sandreas.sandberg@arm.com  # in cache already
5911986Sandreas.sandberg@arm.com  _eigen3_check_version()
6011986Sandreas.sandberg@arm.com  set(EIGEN3_FOUND ${EIGEN3_VERSION_OK})
6111986Sandreas.sandberg@arm.com
6211986Sandreas.sandberg@arm.comelse (EIGEN3_INCLUDE_DIR)
6311986Sandreas.sandberg@arm.com
6411986Sandreas.sandberg@arm.com  find_path(EIGEN3_INCLUDE_DIR NAMES signature_of_eigen3_matrix_library
6511986Sandreas.sandberg@arm.com      PATHS
6611986Sandreas.sandberg@arm.com      ${CMAKE_INSTALL_PREFIX}/include
6711986Sandreas.sandberg@arm.com      ${KDE4_INCLUDE_DIR}
6811986Sandreas.sandberg@arm.com      PATH_SUFFIXES eigen3 eigen
6911986Sandreas.sandberg@arm.com    )
7011986Sandreas.sandberg@arm.com
7111986Sandreas.sandberg@arm.com  if(EIGEN3_INCLUDE_DIR)
7211986Sandreas.sandberg@arm.com    _eigen3_check_version()
7311986Sandreas.sandberg@arm.com  endif(EIGEN3_INCLUDE_DIR)
7411986Sandreas.sandberg@arm.com
7511986Sandreas.sandberg@arm.com  include(FindPackageHandleStandardArgs)
7611986Sandreas.sandberg@arm.com  find_package_handle_standard_args(Eigen3 DEFAULT_MSG EIGEN3_INCLUDE_DIR EIGEN3_VERSION_OK)
7711986Sandreas.sandberg@arm.com
7811986Sandreas.sandberg@arm.com  mark_as_advanced(EIGEN3_INCLUDE_DIR)
7911986Sandreas.sandberg@arm.com
8011986Sandreas.sandberg@arm.comendif(EIGEN3_INCLUDE_DIR)
8111986Sandreas.sandberg@arm.com
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