解决"/usr/include/opencv-3.1.0-dev/opencv"non-existent path问题

在ROS Indigo环境下，手动安装OpenCV3后，编译Whycon时遇到CMake错误，指向不存在的路径。通过修改OpenCVConfig.cmake文件中的路径获取方式，成功解决编译问题。

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ros indigo版本需要手动安装opencv3

sudo apt-get install ros-indigo-opencv3

但在编译whycon时，出现错误
CMake Error in whycon/CMakeLists.txt:
Imported target "opencv_xphoto" includes non-existent path

"/usr/include/opencv-3.1.0-dev/opencv"

in its INTERFACE_INCLUDE_DIRECTORIES. Possible reasons include:

* The path was deleted, renamed, or moved to another location.

* An install or uninstall procedure did not complete successfully.

* The installation package was faulty and references files it does not
provide.

CMake Error in whycon/CMakeLists.txt:
Imported target "opencv_xphoto" includes non-existent path

"/usr/include/opencv-3.1.0-dev/opencv"

in its INTERFACE_INCLUDE_DIRECTORIES. Possible reasons include:

* The path was deleted, renamed, or moved to another location.

* An install or uninstall procedure did not complete successfully.

* The installation package was faulty and references files it does not
provide.

-- Generating done
-- Build files have been written to: /home/ubuntu/catkin_whycon/build
Invoking "cmake" failed

可以看到"/usr/include/opencv-3.1.0-dev/opencv"路径并不存在。
解决方案：

修改/opt/ros/indigo/share/OpenCV-3.1.0-dev中的OpenCVConfig.cmake文件，修改如下：

113:get_filename_component(OpenCV_CONFIG_PATH "${CMAKE_CURRENT_LIST_FILE}" PATH CACHE)
改成
113:get_filename_component(OpenCV_CONFIG_PATH "${CMAKE_CURRENT_LIST_FILE}" PATH )

即可编译通过
参考链接：http://community.bwbot.org/topic/153/kinetic-opencv-cmake-conf-%E6%96%87%E4%BB%B6%E7%9A%84bug%E4%BF%AE%E5%A4%8D/2
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作者：sunyoop
来源：优快云
原文：https://blog.youkuaiyun.com/sunyoop/article/details/79940885
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