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test_find_package.cmake
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test_find_package.cmake
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# Blog: https://blog.csdn.net/fengbingchun/article/details/127473202
message("#### test_${TEST_CMAKE_FEATURE}.cmake ####")
set(FLAG 11 CACHE STRING "Values that can be specified: [1, 11]" FORCE) # 设置FLAG,用来指定测试哪个代码段
if(${FLAG} STREQUAL "1") # 使用MODULE项
find_package(OpenCV) # Found OpenCV: /usr (found version "4.5.4")
message("OpenCV_FOUND: ${OpenCV_FOUND}") # OpenCV_FOUND: 1
message("OpenCV_INCLUDE_DIRS: ${OpenCV_INCLUDE_DIRS}") # OpenCV_INCLUDE_DIRS: /usr/include/opencv4
find_package(OpenCV MODULE) # CMake Warning at test_find_package.cmake:10 (find_package): No "FindOpenCV.cmake" found in CMAKE_MODULE_PATH
message("CMAKE_MODULE_PATH: ${CMAKE_MODULE_PATH}") # CMAKE_MODULE_PATH:
message("OpenCV_FOUND: ${OpenCV_FOUND}") # OpenCV_FOUND: 0
elseif(${FLAG} STREQUAL "2") # 使用QUIET项
find_package(OpenCV QUIET) # 不会再显示: Found OpenCV: /usr (found version "4.5.4")
message("OpenCV_FOUND: ${OpenCV_FOUND}") # OpenCV_FOUND: 1
find_package(OpenCV MODULE QUIET) # 不会再显示： CMake Warning at test_find_package.cmake:17 (find_package): No "FindOpenCV.cmake" found in CMAKE_MODULE_PATH
message("OpenCV_FOUND: ${OpenCV_FOUND}") # OpenCV_FOUND: 0
elseif(${FLAG} STREQUAL "3") # 使用REQUIRED项
find_package(OpenCV MODULE REQUIRED) # CMake Error at test_find_package.cmake:20 (find_package): No "FindOpenCV.cmake" found in CMAKE_MODULE_PATH
elseif(${FLAG} STREQUAL "4") # 使用COMPONENTS项
find_package(OpenCV COMPONENTS opencv_core) # Found OpenCV: /usr (found version "4.5.4") found components: opencv_core
message("OpenCV_FOUND: ${OpenCV_FOUND}") # OpenCV_FOUND: 1
find_package(OpenCV COMPONENTS opencv_xxxx) # Could NOT find OpenCV (missing: opencv_xxxx) (found version "4.5.4"))
# CMake Warning at test_find_package.cmake:25 (find_package): Found package configuration file:
# /usr/lib/x86_64-linux-gnu/cmake/opencv4/OpenCVConfig.cmake
# but it set OpenCV_FOUND to FALSE so package "OpenCV" is considered to be NOT FOUND.
message("OpenCV_FOUND: ${OpenCV_FOUND}") # OpenCV_FOUND: 0
elseif(${FLAG} STREQUAL "5") # 使用OPTIONAL_COMPONENTS项
find_package(OpenCV COMPONENTS opencv_core opencv_highgui) # Found OpenCV: /usr (found version "4.5.4") found components: opencv_core opencv_highgui
message("OpenCV_FOUND: ${OpenCV_FOUND}") # OpenCV_FOUND: 1
find_package(OpenCV COMPONENTS opencv_core opencv_highgui OPTIONAL_COMPONENTS opencv_xxxx opencv_yyyy) # Found OpenCV: /usr (found version "4.5.4") found components: opencv_core opencv_highgui missing components: opencv_xxxx opencv_yyyy
message("OpenCV_FOUND: ${OpenCV_FOUND}") # OpenCV_FOUND: 1
elseif(${FLAG} STREQUAL "6") # 使用version项
find_package(OpenCV 3.4.2) # Found OpenCV: /opt/opencv3.4.2 (found suitable version "3.4.2", minimum required is "3.4.2")
message("OpenCV_FOUND: ${OpenCV_FOUND}") # OpenCV_FOUND: 1
message("OpenCV_INCLUDE_DIRS: ${OpenCV_INCLUDE_DIRS}") # OpenCV_INCLUDE_DIRS: /opt/opencv3.4.2/include;/opt/opencv3.4.2/include/opencv
find_package(OpenCV 2.4.13.7) # CMake Warning at test_find_package.cmake:41 (find_package):
# Could not find a configuration file for package "OpenCV" that is compatible with requested version "2.4.13.7".
# The following configuration files were considered but not accepted:
# /opt/opencv3.4.2/share/OpenCV/OpenCVConfig.cmake, version: 3.4.2
# /usr/lib/x86_64-linux-gnu/cmake/opencv4/OpenCVConfig.cmake, version: 4.5.4
# /lib/x86_64-linux-gnu/cmake/opencv4/OpenCVConfig.cmake, version: 4.5.4
# /opt/opencv3.1/share/OpenCV/OpenCVConfig.cmake, version: 3.1.0
message("OpenCV_FOUND: ${OpenCV_FOUND}") # OpenCV_FOUND: 0
elseif(${FLAG} STREQUAL "7") # 使用EXACT项
find_package(OpenCV 3.4.2) # Found OpenCV: /opt/opencv3.4.2 (found suitable version "3.4.2", minimum required is "3.4.2")
message("OpenCV_FOUND: ${OpenCV_FOUND}") # OpenCV_FOUND: 1
message("OpenCV_INCLUDE_DIRS: ${OpenCV_INCLUDE_DIRS}") # OpenCV_INCLUDE_DIRS: /opt/opencv3.4.2/include;/opt/opencv3.4.2/include/opencv
find_package(OpenCV 3.0.0) # Found OpenCV: /opt/opencv3.4.2 (found suitable version "3.4.2", minimum required is "3.0.0")
message("OpenCV_FOUND: ${OpenCV_FOUND}") # OpenCV_FOUND: 1
find_package(OpenCV 3.0.0 EXACT) # CMake Warning at test_find_package.cmake:57 (find_package):
# Could not find a configuration file for package "OpenCV" that exactly matches requested version "3.0.0".
# The following configuration files were considered but not accepted:
# /opt/opencv3.4.2/share/OpenCV/OpenCVConfig.cmake, version: 3.4.2
# /usr/lib/x86_64-linux-gnu/cmake/opencv4/OpenCVConfig.cmake, version: 4.5.4
# /lib/x86_64-linux-gnu/cmake/opencv4/OpenCVConfig.cmake, version: 4.5.4
# /opt/opencv3.1/share/OpenCV/OpenCVConfig.cmake, version: 3.1.0
message("OpenCV_FOUND: ${OpenCV_FOUND}") # OpenCV_FOUND: 0
elseif(${FLAG} STREQUAL "8") # 使用CONFIG|NO_MODULE项
find_package(OpenCV 3.1.0 EXACT CONFIG)
message("OpenCV_FOUND: ${OpenCV_FOUND}") # OpenCV_FOUND: 1
message("OpenCV_INCLUDE_DIRS: ${OpenCV_INCLUDE_DIRS}") # OpenCV_INCLUDE_DIRS: /opt/opencv3.1/include/opencv;/opt/opencv3.1/include
find_package(OpenCV 4.5.4 EXACT NO_MODULE) # Found OpenCV: /usr (found suitable exact version "4.5.4")
message("OpenCV_FOUND: ${OpenCV_FOUND}") # OpenCV_FOUND: 1
message("OpenCV_INCLUDE_DIRS: ${OpenCV_INCLUDE_DIRS}") # OpenCV_INCLUDE_DIRS: /usr/include/opencv4
elseif(${FLAG} STREQUAL "9") # 使用NAMES项
find_package(opencv) # CMake Warning at test_find_package.cmake:74 (find_package):
# By not providing "Findopencv.cmake" in CMAKE_MODULE_PATH this project has
# asked CMake to find a package configuration file provided by "opencv", but CMake did not find one.
# Could not find a package configuration file provided by "opencv" with any of the following names:
# opencvConfig.cmake
# opencv-config.cmake
message("OpenCV_FOUND: ${OpenCV_FOUND}") # OpenCV_FOUND:
find_package(opencv NAMES OpenCV) # Found OpenCV: /usr (found version "4.5.4")
message("OpenCV_FOUND: ${OpenCV_FOUND}") # OpenCV_FOUND: TRUE
elseif(${FLAG} STREQUAL "10") # 使用CONFIGS项
# 手动copy一份/opt/opencv3.1到/opt/opencv,并将/opt/opencv/share/OpenCV/OpenCVConfig.cmake调整为/opt/opencv/share/opencv/cv_config.cmake
set(OpenCV_DIR "/opt/opencv/share/opencv/")
find_package(OpenCV NO_DEFAULT_PATH) # Could NOT find OpenCV (missing: OpenCV_DIR)
message("OpenCV_FOUND: ${OpenCV_FOUND}") # OpenCV_FOUND: 0
set(OpenCV_DIR "/opt/opencv/share/opencv/")
find_package(OpenCV CONFIGS cv_config.cmake NO_DEFAULT_PATH)
message("OpenCV_INCLUDE_DIRS: ${OpenCV_INCLUDE_DIRS}") # OpenCV_INCLUDE_DIRS: /opt/opencv/include/opencv;/opt/opencv/include
message("OpenCV_FOUND: ${OpenCV_FOUND}") # OpenCV_FOUND: 1
message("OpenCV_CONFIG: ${OpenCV_CONFIG}") # OpenCV_CONFIG: /opt/opencv/share/opencv/cv_config.cmake
message("OpenCV_CONSIDERED_CONFIGS: ${OpenCV_CONSIDERED_CONFIGS}") # OpenCV_CONSIDERED_CONFIGS: /opt/opencv/share/opencv/cv_config.cmake
message("OpenCV_CONSIDERED_VERSIONS: ${OpenCV_CONSIDERED_VERSIONS}") # OpenCV_CONSIDERED_VERSIONS: unknown
elseif(${FLAG} STREQUAL "11")
find_package(OpenCV) # Found OpenCV: /usr (found version "4.5.4")
message("OpenCV_FOUND: ${OpenCV_FOUND}") # OpenCV_FOUND: 1
message("OpenCV_CONSIDERED_CONFIGS: ${OpenCV_CONSIDERED_CONFIGS}") # OpenCV_CONSIDERED_CONFIGS: /usr/lib/x86_64-linux-gnu/cmake/opencv4/OpenCVConfig.cmake
message("OpenCV_CONSIDERED_VERSIONS: ${OpenCV_CONSIDERED_VERSIONS}") # OpenCV_CONSIDERED_VERSIONS: 4.5.4
message("CMAKE_LIBRARY_ARCHITECTURE: ${CMAKE_LIBRARY_ARCHITECTURE}") # CMAKE_LIBRARY_ARCHITECTURE: x86_64-linux-gnu
message("FIND_LIBRARY_USE_LIB64_PATHS: ${FIND_LIBRARY_USE_LIB64_PATHS}") # FIND_LIBRARY_USE_LIB64_PATHS:
endif()