对Using OpenCV with gcc and CMake的补充
https://docs.opencv.org/4.5.5/db/df5/tutorial_linux_gcc_cmake.html
写的已经不错,我补充点,让教程更便捷。
opencv源码编译
cmake -D CMAKE_BUILD_TYPE=Release -D CMAKE_INSTALL_PREFIX=/home/xxx/cv ..
make
make install
编译好的头文件和库就都安装到 /home/xxx 目录下的cv文件夹了。主要是不想污染 /lib
cmake list写法
官方教程里用了
find_package( OpenCV REQUIRED ) 配置有点麻烦。
我是这么写的:
/home/xxx/opencv/build 是我编译opencv的地方
cmake_minimum_required(VERSION 3.7) project(cv-test VERSION 0.1.0) set(CMAKE_CXX_STANDARD 11) set(CMAKE_CXX_STANDARD_REQUIRED True) file(GLOB SOURCE_FILES "*.cpp") add_executable(${PROJECT_NAME} ${SOURCE_FILES}) set(OpenCV_DIR /home/xxx/opencv/build) FIND_PACKAGE(OpenCV) IF (${OpenCV_FOUND}) MESSAGE(STATUS "Found OPENCV.") ELSE (${OpenCV_FOUND}) MESSAGE(STATUS "Could not locate opencv. where u install opencv lib?") ENDIF (${OpenCV_FOUND}) IF (${OpenCV_FOUND}) INCLUDE_DIRECTORIES( ${OpenCV_INCLUDE_DIRS} ) ENDIF (${OpenCV_FOUND}) IF (${OpenCV_FOUND}) target_link_libraries(${PROJECT_NAME} ${OpenCV_LIBS}) ENDIF (${OpenCV_FOUND}) set(CMAKE_BUILD_TYPE "Debug") # set(CMAKE_BUILD_TYPE "Release") if( CMAKE_BUILD_TYPE STREQUAL "Debug" ) set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -g -Wall -Wno-unused-variable -pthread") MESSAGE(STATUS "Debug") else( CMAKE_BUILD_TYPE STREQUAL "Debug" ) set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -O2 -pthread -fopenmp") MESSAGE(STATUS "Release") endif( CMAKE_BUILD_TYPE STREQUAL "Debug" )
之前用过更低级但是简单的写法:
cmake_minimum_required(VERSION 2.8) project( test00 ) include_directories( /home/xxx/cv/include/opencv4 } ) add_executable( test00 main.cpp arrowedline2.cpp ) target_link_libraries( test00 /home/xxx/cv/lib/libopencv_core.so /home/xxx/cv/lib/libopencv_imgproc.so /home/xxx/cv/lib/libopencv_highgui.so /home/xxx/cv/lib/libopencv_imgcodecs.so ) set(CMAKE_BUILD_TYPE "Release") if( CMAKE_BUILD_TYPE STREQUAL "Debug" ) set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -g -Wall -Wno-unused-variable -pthread") else( CMAKE_BUILD_TYPE STREQUAL "Debug" ) set(CMAKE_BUILD_TYPE "Release") set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -O2 -pthread -fopenmp") endif( CMAKE_BUILD_TYPE STREQUAL "Debug" ) message("Build Type:"${CMAKE_BUILD_TYPE} ${CMAKE_CXX_FLAGS})
set(CMAKE_BUILD_TYPE "Release") 之后的部分不重要,可以全部去掉。
其他的按照官方教程走,没问题