message: optionally include FindPkgConfig.cmake
diff: @@ -449,7 +449,10 @@ set_target_properties(rtabmap_point_cloud_assembler PROPERTIES OUTPUT_NAME "poin
  IF(rviz_FOUND)
  ## We also use Ogre for rviz plugins
  + # this file doesn't exist post-noetic, but pkg_check_modules still works
  + IF(EXISTS $ENV{ROS_ROOT}/core/rosbuild/FindPkgConfig.cmake)
  include($ENV{ROS_ROOT}/core/rosbuild/FindPkgConfig.cmake)
  + ENDIF()
  pkg_check_modules(OGRE OGRE)
  include_directories( ${OGRE_INCLUDE_DIRS} )
  link_directories( ${OGRE_LIBRARY_DIRS} )
  