Ubuntu16.04安装pcl，方法是直接执行：
sudo apt-get install libpcl-dev pcl-tools
运行测试程序时出现以下错误：
make[2]: *** No rule to make target '/usr/lib/x86_64-linux-gnu/libproj.so', needed by 'joinMap'. Stop.
CMakeFiles/Makefile2:67: recipe for target 'CMakeFiles/joinMap.dir/all' failed
make[1]: *** [CMakeFiles/joinMap.dir/all] Error 2
Makefile:83: recipe for target 'all' failed
make: *** [all] Error 2
*** Failure: Exit code 2 ***
解决方法，执行：
sudo apt-get install libproj-dev
再次编译出现以下错误：
-- Build files have been written to: /home/wd/code/slambook-master/ch5/joinMap/build
[ 50%] Linking CXX executable joinMap
/usr/bin/ld: cannot find -lvtkproj4
collect2: error: ld returned 1 exit status
CMakeFiles/joinMap.dir/build.make:349: recipe for target 'joinMap' failed
make[2]: *** [joinMap] Error 1
CMakeFiles/Makefile2:67: recipe for target 'CMakeFiles/joinMap.dir/all' failed
make[1]: *** [CMakeFiles/joinMap.dir/all] Error 2
Makefile:83: recipe for target 'all' failed
make: *** [all] Error 2
*** Failure: Exit code 2 ***
解决方法，需要在cmakelist中加一条指令修复，即在add_executable语句前面加上list(REMOVE_ITEM PCL_LIBRARIES"vtkproj4")
