$ 符号是用来表示相对路径吗?
Project settings
Let us say the project is placed under /PATH/TO/MY/GRAND/PROJECT that contains a lonely cpp file name pcd_write.cpp (copy it from the Writing Point Cloud data to PCD files tutorial). Do:
$ cd /PATH/TO/MY/GRAND/PROJECT
$ cp /PATH/TO/WHERE/YOU/DOWNLOADED/FindPCL.cmake .
And create a file named CMakeLists.txt that contains:
cmake_minimum_required(VERSION 2.6 FATAL_ERROR)
add_definitions(${PCL_DEFINITIONS})
这些 $ 标志是什么作用?是相对路径吗?我看vs2008貌似路径设置里面有同学也加一个 $ 符号。