catkin_make doesn't find all the targets

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When I run catkin_make, it gives the following output:

Base path: /home/ben/workspaces/ROS/smf1
Source space: /home/ben/workspaces/ROS/smf1/src
Build space: /home/ben/workspaces/ROS/smf1/build
Devel space: /home/ben/workspaces/ROS/smf1/devel
Install space: /home/ben/workspaces/ROS/smf1/install
####
#### Running command: "make cmake_check_build_system" in "/home/ben/workspaces/ROS/smf1/build"
####
####
#### Running command: "make -j4 -l4" in "/home/ben/workspaces/ROS/smf1/build"
####
Built target smf1_gazebo_pkg_xacro_generated_to_devel_space_

I don't know what "smf1_gazebo_pkg_xacro_generated_to_devel_space_" is. I have a package called simply "smf1_gazebo_pkg". It uses xacro. catkin_make works fine in my other workspaces, and I don't see a difference in the CMakeLists.txt files. It doesn't seem to find any .xacro files or .gazebo files. The CMakeLists.txt file for the package smf1_gazebo_pkg is this:

       cmake_minimum_required(VERSION 2.8.3)
        project(smf1_gazebo_pkg)

        ## Find catkin macros and libraries
        ## if COMPONENTS list like find_package(catkin REQUIRED COMPONENTS xyz)
        ## is used, also find other catkin packages
        find_package(catkin REQUIRED COMPONENTS
          geometry_msgs
          roscpp
          rviz
          tf
          urdf
          xacro
        )
include_directories(
      ${catkin_INCLUDE_DIRS}
    )

The CMakeLists.txt has the same thing for a sub package, but specifies its name, mybot_description, and also has install(DIRECTORY urdf DESTINATION ${CATKIN_PACKAGE_SHARE_DESTINATION}).

Here is what I get from running tree -L 3 ~/workspaces/ROS/smf1/src There should be files under urdf. That's where all the .xacro and .gazebo files are at. Also, the project runs. When I roslaunch the mybot_world.launch file, gazebo comes up and my robot appears. Changes don't reflect though, obviously. I'm getting really confussed.

├── CMakeLists.txt -> /opt/ros/kinetic/share/catkin/cmake/toplevel.cmake
└── smf1_gazebo_pkg
    ├── CMakeLists.txt
    ├── include
    │   └── smf1_gazebo_pkg
    ├── launch
    │   └── mybot_world.launch
    ├── mybot_control
    │   ├── CMakeLists.txt
    │   ├── config
    │   ├── launch
    │   └── package.xml
    ├── mybot_description
    │   ├── CMakeLists.txt
    │   ├── package.xml
    │   └── urdf
    ├── mybot.rviz
    ├── package.xml
    ├── src
    └── worlds
        └── mybot.world

Does anyone have any ideas about this? Thanks.