安装运行cartographer，包括古月居给的代码踩坑经历

安装运行cartographer，包括古月居给的代码踩坑经历

1. Cartographer安装教程 ，
   这里就不搬运了，大家自己去看链接: https://blog.youkuaiyun.com/weixin_44684139/article/details/104708387
   说一说要注意的几点：
   1 一定要先把准备工作做好，卸载ros自带proto2再安装protobuf3.6.0
   2 安装cartographer在加入cartographer_ros.rosinstall并更新依赖时，总之就是要把

sudo gedit carto_ws/src/.rosinstall

中的下载链接设置有cartographer、cartographer_ros和ceres-solver，也就是最终会下载这三个文件夹，这里的链接不重要，重要的编译时会报错

– Found GMock: gmock_main;-lpthread
CMake Error at CMakeLists.txt:32 (find_package):
By not providing “Findabsl.cmake” in CMAKE_MODULE_PATH this project has
asked CMake to find a package configuration file provided by “absl”, but
CMake did not find on