catkin_make in catkin_ws error

edit

I am new in using catkin, as a former rosbuild user. I was following the new tutorials online. After I learning how to build a package, on website:

BuildingPackages

After I modify the package.xml in the created package, and source the setup.bash in installation directory, the output of catkin_make is :

Base path: /home/wu/catkin_ws
Source space: /home/wu/catkin_ws/src
Build space: /home/wu/catkin_ws/build
Devel space: /home/wu/catkin_ws/devel
Install space: /home/wu/catkin_ws/install
####
#### Running command: "make cmake_check_build_system" in "/home/wu/catkin_ws/build"
####
####
#### Running command: "make -j4" in "/home/wu/catkin_ws/build"
####

and there is no build file of beginner_tutorials in the build/ directory.

However, on another website: using_a_workspace

I tried another command

catkin_make --force-cmake

since I have compiled the workspace after I made the directory followed by the website: InstallingandConfiguringROSEnvironment

I am wondering is it correct to add --force-cmake after the catkin_make command or the problem occurs because some other issues?

Thanks Kanzhi