cmake/macros/MacroOpenCV.cmake

0001 # A macro wrapper to find OpenCV library
0002 #
0003 # Syntax:  DETECT_OPENCV(OPENCV_MIN_VERSION OPENCV_REQUIRED_COMPONENTS)
0004 #
0005 # Example: DETECT_OPENCV(3.3.0 core highgui objdetect contrib)
0006 # which try to find OpenCV version 3.3.0
0007 # with internal components "core", "highgui", "objdetect", and "contrib".
0008 #
0009 # Once done this will be adjusted:
0010 #
0011 # OpenCV_FOUND        - OpenCV detection flag
0012 # OpenCV_INCLUDE_DIRS - OpenCV include directories
0013 # OpenCV_LIBS         - OpenCV libraries
0014 #
0015 # SPDX-FileCopyrightText: 2010-2024 by Gilles Caulier, <caulier dot gilles at gmail dot com>
0016 #
0017 # SPDX-License-Identifier: BSD-3-Clause
0018 #
0019
0020 macro(DETECT_OPENCV OPENCV_MIN_VERSION)
0021
0022     # Reset to avoid picking up extra libraries
0023     set(OpenCV_LIBS)
0024
0025     set(OPENCV_REQUIRED_COMPONENTS "${ARGN}")
0026
0027     find_package(OpenCV COMPONENTS ${OPENCV_REQUIRED_COMPONENTS} PATHS /usr/local)
0028
0029     if(OpenCV_FOUND)
0030
0031         message(STATUS "OpenCV Root directory is: ${OpenCV_DIR}")
0032
0033         # check OpenCV version
0034
0035         if(OpenCV_VERSION)
0036
0037             message(STATUS "OpenCV: Found version ${OpenCV_VERSION} (required: ${OPENCV_MIN_VERSION})")
0038
0039             if(${OpenCV_VERSION} VERSION_LESS ${OPENCV_MIN_VERSION})
0040
0041                 message(WARNING "OpenCV: Version is too old.")
0042                 set(OpenCV_FOUND FALSE)
0043
0044             endif()
0045
0046         else()
0047
0048             message(WARNING "OpenCV: Version information not found, your version is probably too old.")
0049             set(OpenCV_FOUND FALSE)
0050
0051         endif()
0052
0053         message(STATUS "OpenCV headers: ${OpenCV_INCLUDE_DIRS}")
0054         message(STATUS "OpenCV libs   : ${OpenCV_LIBS}")
0055
0056     endif()
0057
0058 endmacro()