slam遇见问题

1.roscore：未找到命令
 使用语句: source /opt/ros/indigo/setup.bash

2.Pangolin X11: Unable to retrieve framebuffer options
 解决方法：将源码目录Pangolin\src\display\device下的display_x11.cpp文件做如下修改，注释下面的两行代码即可：//注释这一行GLX_SAMPLE_BUFFERS , glx_sample_buffers,
    //注释这一行 GLX_SAMPLES , glx_sample_buffers > 0 ? glx_samples : 0,
 (https://blog.youkuaiyun.com/u011092188/article/details/55054253)

  cd Pangolin
  mkdir build
  cd build
  cmake ..
  make -j8
  sudo install make

3.lsd_slam编译问题：

使用https://blog.youkuaiyun.com/softimite_zifeng/article/details/78632506  记于2018.06.14 21:17

4.如何在ROS下向ROS_PACKAGE_PATH中添加路径来解决找不到包的情况
  sudo gedit ~/.bashrc
  https://blog.youkuaiyun.com/qq_38347931/article/details/80267150