一般情况Cmake的find_package会去默认的路径搜索指定的包 例如: find_package(OpenCV 2.3 REQUIRED) Cmake会去/usr/share/目录下查找OpenCVConfig.cmake文件 但时候装了多个Opencv的包，那么应用程序编译时就需要指定具体包的安装路径. 1: 设置CMake的find_package搜索路径 set CMAKE_PREFIX_PATH " include cmake" 比如: 自己用源码安装的openCV路径为: /home/opencv_INSTALL/ bin include lib share/OpenCV-OpenCVConfig.cmake 那么在CmakeList设置为:set( CMAKE_PREFIX_PATH "/home/opencv_INSTALL/share") 既可. 2: 新增头文件和库文件路径 set(PCL_INCLUDE_DIRS "/you inc dir") include_directories(${PCL_INCLUDE_DIRS}) set(PCL_LIBRARY_DIRS "/you lib dir") link_directories(${PCL_LIBRARY_DIRS}) 3: 增加链接库,比如libpcap.so target_link_libraries (cloud_viewer ${PCL_LIBRARIES} pcap)

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