1.make: *** 没有指明目标并且找不到 makefile。 停止。

参考：
https://blog.csdn.net/Stackingrule/article/details/90417204
https://blog.csdn.net/limhsysu/article/details/84993146
解决：

gedit .bashrc

在.bashrc文件末尾添加
export ROS_PACKAGE_PATH=${ROS_PACKAGE_PATH}:/home/××（换成自己的路径）/catkin_ws/src/ORB_SLAM2/Examples/ROS

source ~/.bashrc

Makefile:127: recipe for target ‘all’ failed
make: *** [all] Error 2

https://blog.csdn.net/zhuiqiuzhuoyue583/article/details/107392436