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catkin package の最も簡単な形
	
	my_package/
  CMakeLists.txt
  package.xml
	 
catkin Workspace の形
	
	workspace_folder/        -- WORKSPACE
  src/                   -- SOURCE SPACE
    CMakeLists.txt       -- 'Toplevel' CMake file, provided by catkin
    package_1/
      CMakeLists.txt     -- CMakeLists.txt file for package_1
      package.xml        -- Package manifest for package_1
    ...
    package_n/
      CMakeLists.txt     -- CMakeLists.txt file for package_n
      package.xml        -- Package manifest for package_n
	 
  Creating a workspace for catkin 
 
パッケージをつくる
──std_msgs, roscpp, and rospy に依拠
 $ cd ~/catkin_ws/src
	$ catkin_create_pkg <package name> std_msgs rospy roscpp
 
パッケージの build
	
	$ cd ~/catkin_ws
	$ catkin_make
 
ワークスペースを ROS environment に加える
	
	$ . ~/catkin_ws/devel/setup.bash
	 註. 「.」は,bash で「source」と同じ
 
 
 
 
 
~/catkin_ws/src$ catkin_create_pkg beginner_tutorials std_msgs rospy roscpp
Created file beginner_tutorials/package.xml
Created file beginner_tutorials/CMakeLists.txt
Created folder beginner_tutorials/include/beginner_tutorials
Created folder beginner_tutorials/src
Successfully created files in /home/ubuntu/catkin_ws/src/beginner_tutorials. 
Please adjust the values in package.xml.
~/catkin_ws/src$ ls
 beginner_tutorials  
	CMakeLists.txt
 ~/catkin_ws/src$ ls beginner_tutorials
 CMakeLists.txt
	include
 package.xml
 src
 
 ~/catkin_ws$ catkin_make
Base path: /home/ubuntu/catkin_ws
Source space: /home/ubuntu/catkin_ws/src
Build space: /home/ubuntu/catkin_ws/build
Devel space: /home/ubuntu/catkin_ws/devel
Install space: /home/ubuntu/catkin_ws/install
####
#### Running command: "cmake /home/ubuntu/catkin_ws/src 
   -DCATKIN_DEVEL_PREFIX=/home/ubuntu/catkin_ws/devel 
   -DCMAKE_INSTALL_PREFIX=/home/ubuntu/catkin_ws/install 
   -G Unix Makefiles" in "/home/ubuntu/catkin_ws/build"
####
-- Using CATKIN_DEVEL_PREFIX: /home/ubuntu/catkin_ws/devel
-- Using CMAKE_PREFIX_PATH: /home/ubuntu/catkin_ws/devel;/opt/ros/noetic
-- This workspace overlays: /home/ubuntu/catkin_ws/devel;/opt/ros/noetic
-- Found PythonInterp: /usr/bin/python3 (found suitable version "3.8.5", minimum required is "3") 
-- Using PYTHON_EXECUTABLE: /usr/bin/python3
-- Using Debian Python package layout
-- Using empy: /usr/lib/python3/dist-packages/em.py
-- Using CATKIN_ENABLE_TESTING: ON
-- Call enable_testing()
-- Using CATKIN_TEST_RESULTS_DIR: /home/ubuntu/catkin_ws/build/test_results
-- Forcing gtest/gmock from source, though one was otherwise available.
-- Found gtest sources under '/usr/src/googletest': gtests will be built
-- Found gmock sources under '/usr/src/googletest': gmock will be built
-- Found PythonInterp: /usr/bin/python3 (found version "3.8.5") 
-- Using Python nosetests: /usr/bin/nosetests3
-- catkin 0.8.9
-- BUILD_SHARED_LIBS is on
-- BUILD_SHARED_LIBS is on
-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-- ~~  traversing 1 packages in topological order:
-- ~~  - beginner_tutorials
-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-- +++ processing catkin package: 'beginner_tutorials'
-- ==> add_subdirectory(beginner_tutorials)
-- Configuring done
-- Generating done
-- Build files have been written to: /home/ubuntu/catkin_ws/build
####
#### Running command: "make -j4 -l4" in "/home/ubuntu/catkin_ws/build"
####
 
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