ubuntu18.04安装pcl1.7.2报错 error: ISO C++ forbids comparison between pointer and integer [-fpermissive]

找到octree_base_node.hpp:文件将children_[i] == false改成！children_[i]

接着编译又报错

/home/a/pcl-pcl-1.7.2/registration/include/pcl/registration/correspondence_estimation_backprojection.h:188:41: error: return-statement with a value, in function returning 'void' [-fpermissive]
         getKSearch () const { return (k_); }

解决：找到correspondence_estimation_backprojection.h文件将返回值void改称int