CMake构建OpenCV，GDAL项目

CMake构建OpenCV，GDAL项目

本文举例的开源库是OpenCV和GDAL，其他块源库类似

使用本篇方法的前提是make install，即开源库是install的。
当然，没有install的也是可以用的，只需要在findpage前找到DIR即可。
如找OpenCV：
set(OpenCV_DIR /home/jie/third_party/opencv-3.4.0/build)

另外，findpage所返回的变量如OpenCV_LIBS有什么可以去对应的FindXX.cmake文件中找。

OpenCV：
CMakeLists：

# 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})

---

GDAL：
CMakeList：

# cmake needs this line
cmake_minimum_required(VERSION 2.8)

# Define project name
project(gdaltest)


find_package(GDAL REQUIRED)


message(STATUS "GDAL library status:")
message(STATUS "    version: ${GDAL_VERSION}")
message(STATUS "    libraries: ${GDAL_LIBRARY}")
message(STATUS "    include path: ${GDAL_INCLUDE_DIRS}")


include_directories(${GDAL_INCLUDE_DIRS})


add_executable(main test.cpp)


target_link_libraries(main ${GDAL_LIBRARY})