## page was copied from ROS/Tutorials/rosbuild/BuildingPackages
<<TOC(4)>>

=== Building Packages ===
Once all the system dependencies are installed, we can build our package that we just created. 

==== Using rosmake ====
`rosmake` is just like the `make` command, but it does some special ROS magic. When you type `rosmake beginner_tutorials`, it builds the `beginner_tutorials` package, plus every package that it depends on, in the correct order. Since we listed rospy, roscpp, and std_msgs as dependencies when creating our ROS package, these packages (and their dependiencies, and so on) will be built by `rosmake` as well.

Usage:
{{{
rosmake [package]
}}}

Try:
{{{
$ rosmake beginner_tutorials
}}}

This previous command may take a while to finish.   As it is running you should see some output like:
 {{{
[ rosmake ] No package specified.  Building ['beginner_tutorials']
[ rosmake ] Logging to directory
[ rosmake ] /home/dbking/.ros/rosmake_output-2009-09-22-03-17-14
[ rosmake ] [ 0 of 18  Completed ]
[rosmake-0] >>> genmsg_cpp >>> [ make ]
[rosmake-0] <<< genmsg_cpp <<< [PASS] [ 0.39 seconds ]
[ rosmake ] [ 1 of 18  Completed ]
...
...
...
[ rosmake ] [ 17 of 18  Completed ]
[rosmake-0] >>> beginner_tutorials >>> [ make ]
[rosmake-0] <<< beginner_tutorials <<< [PASS] [ 0.79 seconds ]
}}}

On Fuerte, since dependencies are greatly reduced, this takes almost no time and produces:
 {{{
[ rosmake ] rosmake starting...                                                                     
[ rosmake ] Packages requested are: ['beginner_tutorials']                                          
[ rosmake ] Logging to directory /home/alex/.ros/rosmake/rosmake_output-20120603-082414             
[ rosmake ] Expanded args ['beginner_tutorials'] to:
['beginner_tutorials']                         
[rosmake-0] Starting >>> std_msgs [ make ]                                                          
[rosmake-1] Starting >>> roslang [ make ]                                                           
[rosmake-0] Finished <<< std_msgs ROS_NOBUILD in package std_msgs
 No Makefile in package std_msgs  
[rosmake-1] Finished <<< roslang ROS_NOBUILD in package roslang
 No Makefile in package roslang     
[rosmake-1] Starting >>> rospy [ make ]                                                             
[rosmake-2] Starting >>> roscpp [ make ]                                                            
[rosmake-1] Finished <<< rospy ROS_NOBUILD in package rospy
 No Makefile in package rospy           
[rosmake-2] Finished <<< roscpp ROS_NOBUILD in package roscpp
 No Makefile in package roscpp        
[rosmake-2] Starting >>> beginner_tutorials [ make ]                                                
[rosmake-2] Finished <<< beginner_tutorials [PASS] [ 1.14 seconds ]                                 
[ rosmake ] Results:                                                                                
[ rosmake ] Built 5 packages with 0 failures.                                                       
[ rosmake ] Summary output to directory                                                             
[ rosmake ] /home/alex/.ros/rosmake/rosmake_output-20120603-082414  
}}}

==== rosmake multiple packages ====
We can also use `rosmake` to build multiple packages at once. 

Usage:
{{{
rosmake [package1] [package2] [package3]
}}}

=== Review ===
Lets just list some of the commands we've used so far:
 * rosdep = ros+dep(endencies) : a tool to install package dependencies
 * rosmake = ros+make : makes (compiles) a ROS package