写一下我的安装gridmap的心酸泪

a：首先出现 Could not find a package configuration file provided by “ros_pcl" with any of the following names: ros_pclConfig.cmake ros_pcl-config.cmake 然后我以为是pcl没有安装好，就努力的安装pcl，中间有步骤会删除ros的一些东西，你得重新搞回来， pc

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