CMakeLists.txt: Remove redundant check on SDF

SDFormat is already searched and included by gazebo-config.cmake
The SDFormat include dirs are in GAZEBO_INCLUDE_DIRS
and the libraries are in GAZEBO_LIBRARY_DIRS.
Both variables are already used.
Signed-off-by: Nicolae Rosia <nicolae.rosia@gmail.com>

CMakeLists.txt

@@ -11,7 +11,6 @@ find_package(Eigen3 REQUIRED)
 pkg_check_modules( protobuf REQUIRED protobuf )
 
 FIND_PACKAGE( Boost 1.40 COMPONENTS system thread REQUIRED )
-pkg_check_modules(SDF REQUIRED sdformat)
 add_definitions(-std=c++11)
 
 set(GAZEBO_MSG_INCLUDE_DIRS)
@@ -25,7 +24,6 @@ include_directories(
   include
   ${GAZEBO_INCLUDE_DIRS}
   ${GAZEBO_MSG_INCLUDE_DIRS}
-  ${SDF_INCLUDE_DIRS}
   ${EIGEN3_INCLUDE_DIR}
   ${OpenCV_INCLUDE_DIRS}
   ${CMAKE_CURRENT_BINARY_DIR}/msgs
@@ -62,29 +60,29 @@ target_link_libraries(rotors_gazebo_controller_interface ${GAZEBO_LIBRARIES} ${B
 add_dependencies(rotors_gazebo_controller_interface mav_msgs)
 
 add_library(rotors_gazebo_motor_model SHARED src/gazebo_motor_model.cpp)
-target_link_libraries(rotors_gazebo_motor_model mav_msgs ${Boost_LIBRARIES} ${GAZEBO_LIBRARIES} ${SDF_LIBRARIES} ${Boost_SYSTEM_LIBRARY_RELEASE} ${Boost_THREAD_LIBRARY_RELEASE})
+target_link_libraries(rotors_gazebo_motor_model mav_msgs ${Boost_LIBRARIES} ${GAZEBO_LIBRARIES} ${Boost_SYSTEM_LIBRARY_RELEASE} ${Boost_THREAD_LIBRARY_RELEASE})
 add_dependencies(rotors_gazebo_motor_model mav_msgs)
 
 add_library(rotors_gazebo_multirotor_base_plugin SHARED src/gazebo_multirotor_base_plugin.cpp)
-target_link_libraries(rotors_gazebo_multirotor_base_plugin mav_msgs ${Boost_LIBRARIES} ${GAZEBO_LIBRARIES} ${SDF_LIBRARIES} ${Boost_SYSTEM_LIBRARY_RELEASE} ${Boost_THREAD_LIBRARY_RELEASE})
+target_link_libraries(rotors_gazebo_multirotor_base_plugin mav_msgs ${Boost_LIBRARIES} ${GAZEBO_LIBRARIES} ${Boost_SYSTEM_LIBRARY_RELEASE} ${Boost_THREAD_LIBRARY_RELEASE})
 add_dependencies(rotors_gazebo_multirotor_base_plugin mav_msgs)
 
 add_library(rotors_gazebo_imu_plugin SHARED src/gazebo_imu_plugin.cpp)
-target_link_libraries(rotors_gazebo_imu_plugin mav_msgs ${Boost_LIBRARIES} ${GAZEBO_LIBRARIES} ${SDF_LIBRARIES} ${Boost_SYSTEM_LIBRARY_RELEASE} ${Boost_THREAD_LIBRARY_RELEASE})
+target_link_libraries(rotors_gazebo_imu_plugin mav_msgs ${Boost_LIBRARIES} ${GAZEBO_LIBRARIES} ${Boost_SYSTEM_LIBRARY_RELEASE} ${Boost_THREAD_LIBRARY_RELEASE})
 add_dependencies(rotors_gazebo_imu_plugin mav_msgs)
 
 add_library(gazebo_opticalFlow_plugin SHARED src/gazebo_opticalFlow_plugin.cpp)
-target_link_libraries(gazebo_opticalFlow_plugin mav_msgs ${Boost_LIBRARIES} ${GAZEBO_LIBRARIES} ${SDF_LIBRARIES} ${Boost_SYSTEM_LIBRARY_RELEASE} ${Boost_THREAD_LIBRARY_RELEASE} ${OpenCV_LIBS})
+target_link_libraries(gazebo_opticalFlow_plugin mav_msgs ${Boost_LIBRARIES} ${GAZEBO_LIBRARIES} ${Boost_SYSTEM_LIBRARY_RELEASE} ${Boost_THREAD_LIBRARY_RELEASE} ${OpenCV_LIBS})
 add_dependencies(gazebo_opticalFlow_plugin mav_msgs)
 
 add_library(gazebo_lidar_plugin SHARED src/gazebo_lidar_plugin.cpp)
-target_link_libraries(gazebo_lidar_plugin mav_msgs ${Boost_LIBRARIES} ${GAZEBO_LIBRARIES} ${SDF_LIBRARIES} ${Boost_SYSTEM_LIBRARY_RELEASE} ${Boost_THREAD_LIBRARY_RELEASE})
+target_link_libraries(gazebo_lidar_plugin mav_msgs ${Boost_LIBRARIES} ${GAZEBO_LIBRARIES} ${Boost_SYSTEM_LIBRARY_RELEASE} ${Boost_THREAD_LIBRARY_RELEASE})
 add_dependencies(gazebo_lidar_plugin mav_msgs)
 
 add_library(rotors_gazebo_mavlink_interface SHARED src/gazebo_mavlink_interface.cpp src/geo_mag_declination.cpp)
-target_link_libraries(rotors_gazebo_mavlink_interface mav_msgs ${Boost_LIBRARIES} ${GAZEBO_LIBRARIES} ${SDF_LIBRARIES} ${Boost_SYSTEM_LIBRARY_RELEASE} ${Boost_THREAD_LIBRARY_RELEASE})
+target_link_libraries(rotors_gazebo_mavlink_interface mav_msgs ${Boost_LIBRARIES} ${GAZEBO_LIBRARIES} ${Boost_SYSTEM_LIBRARY_RELEASE} ${Boost_THREAD_LIBRARY_RELEASE})
 add_dependencies(rotors_gazebo_mavlink_interface mav_msgs)
 
 add_library(LiftDragPlugin SHARED src/liftdrag_plugin/liftdrag_plugin.cpp)
-target_link_libraries(LiftDragPlugin mav_msgs ${Boost_LIBRARIES} ${GAZEBO_LIBRARIES} ${SDF_LIBRARIES} ${Boost_SYSTEM_LIBRARY_RELEASE} ${Boost_THREAD_LIBRARY_RELEASE})
+target_link_libraries(LiftDragPlugin mav_msgs ${Boost_LIBRARIES} ${GAZEBO_LIBRARIES} ${Boost_SYSTEM_LIBRARY_RELEASE} ${Boost_THREAD_LIBRARY_RELEASE})
 add_dependencies(LiftDragPlugin mav_msgs)