学习记录

代码

cmake_minimum_required (VERSION 2.6) cmake_policy(SET CMP0012 NEW) PROJECT(proexe) FIND_PACKAGE( OpenCV 4.3.0 REQUIRED ) MESSAGE("OpenCV version : ${OpenCV_VERSION}--------------------->>>>>>>>>") include_directories(${OpenCV_INCLUDE_DIRS}) link_directories(${OpenCV_LIB_DIR}) ADD_EXECUTABLE( ${PROJECT_NAME} main.cpp) TARGET_LINK_LIBRARIES( ${PROJECT_NAME} ${OpenCV_LIBS} )

逐行分析

# 检查CMake版本，至少为2.6 # 如果CMake的当前版本低于指定的版本，它会停止处理工程文件，并报告错误。 cmake_minimum_required (VERSION 2.6) # 指定策略，具体不了解 cmake_policy(SET CMP0012 NEW) # 设置工程名为“proexe” PROJECT(proexe) # 使用find_package引入外部依赖包 FIND_PACKAGE( OpenCV 4.3.0 REQUIRED ) # 为用户显示一条消息。 MESSAGE("OpenCV version : ${OpenCV_VERSION}--------------------->>>>>>>>>") # 将OpenCV_INCLUDE_DIRS目录下的文件加入包含目录列表 include_directories(${OpenCV_INCLUDE_DIRS}) # 将OpenCV_LIB_DIR加入编译器链接阶段的搜索目录列表 link_directories(${OpenCV_LIB_DIR}) # 使用main.cpp文件生成一个可执行文件，文件名为工程名 ADD_EXECUTABLE( ${PROJECT_NAME} main.cpp) # 将OpenCV_LIBS路径下文件链接到可执行文件中 TARGET_LINK_LIBRARIES( ${PROJECT_NAME} ${OpenCV_LIBS} )

运行命令

root@raspberrypi:/home/pi/Code/detection# cd build/ root@raspberrypi:/home/pi/Code/detection/build# cmake .. -- The C compiler identification is GNU 8.3.0 -- The CXX compiler identification is GNU 8.3.0 -- Check for working C compiler: /usr/bin/cc -- Check for working C compiler: /usr/bin/cc -- works -- Detecting C compiler ABI info -- Detecting C compiler ABI info - done -- Detecting C compile features -- Detecting C compile features - done -- Check for working CXX compiler: /usr/bin/c++ -- Check for working CXX compiler: /usr/bin/c++ -- works -- Detecting CXX compiler ABI info -- Detecting CXX compiler ABI info - done -- Detecting CXX compile features -- Detecting CXX compile features - done -- Found OpenCV: /usr/local (found suitable version "4.3.0", minimum required is "4.3.0") OpenCV version : 4.3.0--------------------->>>>>>>>> -- Configuring done -- Generating done -- Build files have been written to: /home/pi/Code/detection/build root@raspberrypi:/home/pi/Code/detection/build# make Scanning dependencies of target Project [ 50%] Building CXX object CMakeFiles/Project.dir/main.cpp.o [100%] Linking CXX executable Project [100%] Built target Project root@raspberrypi:/home/pi/Code/detection/build# ./Project