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1# - Try to find Eigen2 lib
2#
3# This module supports requiring a minimum version, e.g. you can do
4#   find_package(Eigen2 2.0.3)
5# to require version 2.0.3 to newer of Eigen2.
6#
7# Once done this will define
8#
9#  EIGEN2_FOUND - system has eigen lib with correct version
10#  EIGEN2_INCLUDE_DIR - the eigen include directory
11#  EIGEN2_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# Redistribution and use is allowed according to the terms of the BSD license.
16
17if(NOT Eigen2_FIND_VERSION)
18  if(NOT Eigen2_FIND_VERSION_MAJOR)
19    set(Eigen2_FIND_VERSION_MAJOR 2)
20  endif(NOT Eigen2_FIND_VERSION_MAJOR)
21  if(NOT Eigen2_FIND_VERSION_MINOR)
22    set(Eigen2_FIND_VERSION_MINOR 0)
23  endif(NOT Eigen2_FIND_VERSION_MINOR)
24  if(NOT Eigen2_FIND_VERSION_PATCH)
25    set(Eigen2_FIND_VERSION_PATCH 0)
26  endif(NOT Eigen2_FIND_VERSION_PATCH)
27
28  set(Eigen2_FIND_VERSION "${Eigen2_FIND_VERSION_MAJOR}.${Eigen2_FIND_VERSION_MINOR}.${Eigen2_FIND_VERSION_PATCH}")
29endif(NOT Eigen2_FIND_VERSION)
30
31macro(_eigen2_check_version)
32  file(READ "${EIGEN2_INCLUDE_DIR}/Eigen/src/Core/util/Macros.h" _eigen2_version_header)
33
34  string(REGEX MATCH "define[ \t]+EIGEN_WORLD_VERSION[ \t]+([0-9]+)" _eigen2_world_version_match "${_eigen2_version_header}")
35  set(EIGEN2_WORLD_VERSION "${CMAKE_MATCH_1}")
36  string(REGEX MATCH "define[ \t]+EIGEN_MAJOR_VERSION[ \t]+([0-9]+)" _eigen2_major_version_match "${_eigen2_version_header}")
37  set(EIGEN2_MAJOR_VERSION "${CMAKE_MATCH_1}")
38  string(REGEX MATCH "define[ \t]+EIGEN_MINOR_VERSION[ \t]+([0-9]+)" _eigen2_minor_version_match "${_eigen2_version_header}")
39  set(EIGEN2_MINOR_VERSION "${CMAKE_MATCH_1}")
40
41  set(EIGEN2_VERSION ${EIGEN2_WORLD_VERSION}.${EIGEN2_MAJOR_VERSION}.${EIGEN2_MINOR_VERSION})
42  if((${EIGEN2_WORLD_VERSION} NOTEQUAL 2) OR (${EIGEN2_MAJOR_VERSION} GREATER 10) OR (${EIGEN2_VERSION} VERSION_LESS ${Eigen2_FIND_VERSION}))
43    set(EIGEN2_VERSION_OK FALSE)
44  else()
45    set(EIGEN2_VERSION_OK TRUE)
46  endif()
47
48  if(NOT EIGEN2_VERSION_OK)
49
50    message(STATUS "Eigen2 version ${EIGEN2_VERSION} found in ${EIGEN2_INCLUDE_DIR}, "
51                   "but at least version ${Eigen2_FIND_VERSION} is required")
52  endif(NOT EIGEN2_VERSION_OK)
53endmacro(_eigen2_check_version)
54
55if (EIGEN2_INCLUDE_DIR)
56
57  # in cache already
58  _eigen2_check_version()
59  set(EIGEN2_FOUND ${EIGEN2_VERSION_OK})
60
61else (EIGEN2_INCLUDE_DIR)
62
63find_path(EIGEN2_INCLUDE_DIR NAMES Eigen/Core
64     PATHS
65     ${INCLUDE_INSTALL_DIR}
66     ${KDE4_INCLUDE_DIR}
67     PATH_SUFFIXES eigen2
68   )
69
70if(EIGEN2_INCLUDE_DIR)
71  _eigen2_check_version()
72endif(EIGEN2_INCLUDE_DIR)
73
74include(FindPackageHandleStandardArgs)
75find_package_handle_standard_args(Eigen2 DEFAULT_MSG EIGEN2_INCLUDE_DIR EIGEN2_VERSION_OK)
76
77mark_as_advanced(EIGEN2_INCLUDE_DIR)
78
79endif(EIGEN2_INCLUDE_DIR)
80
81