No rule to make target /usr/include/eigen3/Eigen/src/Core/../Plugins/CommonCwiseUnaryOps.h', needed by block_grasp_generator-hydro-devel/CMakeFiles/block_grasp_generator_visualization_tools.dir/src/visualization_tools.cpp.o'. Stop.
the file "CommonCwiseUnaryOps.h" exists in "/usr/include/eigen3/Eigen/src/plugins"
eigen_conversionsConfig-version.cmake is in /opt/ros/hydro/share/eigen_conversions/cmake
eigen_conversionsConfig.cmake is in /opt/ros/hydro/share/eigen_conversions/cmake
我该怎么办？
另一个问题是路径"/usr/include/eigen3/Eigen/src/Core/../Plugins/"是什么意思，2个点意味着什么？
答案 0 :(得分：4)
2个点表示go to the parent directory，所以
/usr/include/eigen3/Eigen/src/Core/../Plugins/
表示转到
/usr/include/eigen3/Eigen/src/Plugins/
请注意，Plugins为大写，而您的文件位于plugins，小写
/usr/include/eigen3/Eigen/src/plugins