直接看CMakeLists.txt是怎么写的吧！[1]
# cmake needs this line
cmake_minimum_required(VERSION 2.8)
# Define project name
project(opencvTest)
# Find OpenCV, you may need to set OpenCV_DIR variable
# to the absolute path to the directory containing OpenCVConfig.cmake file
# via the command line or GUI
find_package(OpenCV REQUIRED)
# If the package has been found, several variables will
# be set, you can find the full list with descriptions
# in the OpenCVConfig.cmake file.
# Print some message showing some of them
message(STATUS "OpenCV library status:")
message(STATUS " version: ${OpenCV_VERSION}")
message(STATUS " libraries: ${OpenCV_LIBS}")
message(STATUS " include path: ${OpenCV_INCLUDE_DIRS}")
# Add OpenCV headers location to your include paths
include_directories(${OpenCV_INCLUDE_DIRS})
# Declare the executable target built from your sources
add_executable(main main.cpp)
# Link your application with OpenCV libraries
target_link_libraries(main ${OpenCV_LIBS})
首先通过find_package语句找到CMake所需要的所有变量如：
- OpenCV_VERSION
- OpenCV_LIBS
- OpenCV_INCLUDE_DIRS
接下来他和普通的头文件、库的引用就没有什么区别了：
- 头文件支持：
include_directories(${OpenCV_INCLUDE_DIRS}) - 库文件连接：
target_link_libraries(main ${OpenCV_LIBS})
参考文章，有不同版本的OpenCV的指定方法，其实就是将变量设置一下，仅此而已。
[1] https://www.cnblogs.com/tsvico/p/11877933.html
