catkin_make錯誤解決方法

1. 錯誤代碼：
   The specified base path “/home/ghy/catkin_qt” contains a CMakeLists.txt but “catkin_make” must be invoked in the root of workspace…..

出現這種情況的原因是在catkin_qt目錄下運行下catkin_init_workspacce初始化工作空間，出現下面這句：
Creating symlink “/home/ghy/catkin_qt/CMakeLists.txt” pointing to “/opt/ros/indigo/share/catkin/cmake/toplevel.cmake”

將當前工作空間下的CMakeLists.txt與/ros/下的cmake做了鏈接

解決方法：

unlink /home/ghy/catkin_qt/CMakeLists.tx

原文鏈接：https://blog.csdn.net/u013294888/article/details/69696956

2. catkin_make 尚未安裝，錯誤代碼：
   
   但安裝時顯示已安裝
   
   出現這種情況的原因是環境變量沒有配置好。
   解決辦法：

echo "source /opt/ros/melodic/setup.bash" >> ~/.bashrc
source ~/.bashrc
catkin_init_workspace