编译出现问题

[bincoming]

我在Ubuntu2004环境下使用catkin_make编译出现如下错误：

CMake Error: The following variables are used in this project, but they are set to NOTFOUND.
Please set them or make sure they are set and tested correctly in the CMake files:
G2O_CORE_LIBRARY
linked by target "matching_node" in directory /home/joy/WS/localization_in_auto_driving/src/lidar_localization
linked by target "back_end_node" in directory /home/joy/WS/localization_in_auto_driving/src/lidar_localization
linked by target "front_end_node" in directory /home/joy/WS/localization_in_auto_driving/src/lidar_localization
linked by target "data_pretreat_node" in directory /home/joy/WS/localization_in_auto_driving/src/lidar_localization
当然几乎所有发节点都包含这个错误，想请教一下这个是什么问题，

[yunbobai]

我也遇见该问题，请问一下是如何解决的

[33answer33]

我也遇见该问题，请问一下是如何解决的

apt install ros-melodic-libg2o