lio_sam_6axis编译需要现安装gtsam4.0.2wget-O~/Downloads/gtsam.ziphttps://github.com/borglab/gtsam/archive/4.0.2.zipcd~/Downloads/&&unzipgtsam.zip-d~/Downloads/cd~/Downloads/gtsam-4.0.2/mkdirbuild&&cdbuildcmake-DGTSAM_BUILD_WITH