Hi, I recently downloaded the pointcloudtolaserscan package from ROS Perception using github. However, after I installed the dependencies and tried to build the package, the errors suggested me that a the rclcppcomponents and tf2sensormsgs package was not found, yet I am sure that the findpackage() call was in the CMakeLists file. Weirdly enough the other linked librabies such as lasergeometry and messagefilters did not produce similar issues.

Below is the screenshot of my CMakeLists file and the screen shot of the error message. I did not make any change to the files after installing them using git.

cmake_minimum_required(VERSION 3.5)
project(pointcloud_to_laserscan)

find_package(ament_cmake REQUIRED)

find_package(laser_geometry REQUIRED)
find_package(message_filters REQUIRED)
find_package(rclcpp REQUIRED)
find_package(rclcpp_components REQUIRED)
find_package(sensor_msgs REQUIRED)
find_package(tf2 REQUIRED)
find_package(tf2_ros REQUIRED)
find_package(tf2_sensor_msgs REQUIRED)

add_library(laserscan_to_pointcloud SHARED
  src/laserscan_to_pointcloud_node.cpp)
target_compile_definitions(laserscan_to_pointcloud
  PRIVATE "POINTCLOUD_TO_LASERSCAN_BUILDING_DLL")
target_include_directories(laserscan_to_pointcloud PUBLIC
  "$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>"
  "$<INSTALL_INTERFACE:include/${PROJECT_NAME}>"
)
target_link_libraries(laserscan_to_pointcloud
  laser_geometry::laser_geometry
  message_filters::message_filters
  rclcpp::rclcpp
  rclcpp_components::component
  tf2::tf2
  tf2_ros::tf2_ros
  tf2_sensor_msgs::tf2_sensor_msgs
)
rclcpp_components_register_node(laserscan_to_pointcloud
  PLUGIN "pointcloud_to_laserscan::LaserScanToPointCloudNode"
  EXECUTABLE laserscan_to_pointcloud_node)

add_library(pointcloud_to_laserscan SHARED
  src/pointcloud_to_laserscan_node.cpp)
target_compile_definitions(pointcloud_to_laserscan
  PRIVATE "POINTCLOUD_TO_LASERSCAN_BUILDING_DLL")
target_include_directories(pointcloud_to_laserscan PUBLIC
  "$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>"
  "$<INSTALL_INTERFACE:include/${PROJECT_NAME}>"
)
target_link_libraries(pointcloud_to_laserscan
  laser_geometry::laser_geometry
  message_filters::message_filters
  rclcpp::rclcpp
  rclcpp_components::component
  tf2::tf2
  tf2_ros::tf2_ros
  tf2_sensor_msgs::tf2_sensor_msgs
)

Error Message

Starting >>> tutorial_interfaces
Starting >>> more_interfaces
Starting >>> my_package
Starting >>> pointcloud_to_laserscan
Starting >>> py_pubsub
Starting >>> python_parameters
Starting >>> turtlesim
Finished <<< more_interfaces [0.92s]                                         
Finished <<< tutorial_interfaces [0.95s]
Starting >>> py_srvcli
--- stderr: pointcloud_to_laserscan                      
CMake Error at CMakeLists.txt:15 (add_library):
  Target "laserscan_to_pointcloud" links to target
  "rclcpp_components::component" but the target was not found.  Perhaps a
  find_package() call is missing for an IMPORTED target, or an ALIAS target
  is missing?


CMake Error at CMakeLists.txt:15 (add_library):
  Target "laserscan_to_pointcloud" links to target
  "tf2_sensor_msgs::tf2_sensor_msgs" but the target was not found.  Perhaps a
  find_package() call is missing for an IMPORTED target, or an ALIAS target
  is missing?


CMake Error at CMakeLists.txt:36 (add_library):
  Target "pointcloud_to_laserscan" links to target
  "rclcpp_components::component" but the target was not found.  Perhaps a
  find_package() call is missing for an IMPORTED target, or an ALIAS target
  is missing?


CMake Error at CMakeLists.txt:36 (add_library):
  Target "pointcloud_to_laserscan" links to target
  "tf2_sensor_msgs::tf2_sensor_msgs" but the target was not found.  Perhaps a
  find_package() call is missing for an IMPORTED target, or an ALIAS target
  is missing?


CMake Generate step failed.  Build files cannot be regenerated correctly.
---
Failed   <<< pointcloud_to_laserscan [1.40s, exited with code 1]
Aborted  <<< turtlesim [1.37s]
Aborted  <<< my_package [1.48s]
Aborted  <<< py_pubsub [1.46s]
Aborted  <<< python_parameters [1.46s]                                     
Aborted  <<< py_srvcli [0.63s]

Summary: 2 packages finished [1.76s]
  1 package failed: pointcloud_to_laserscan
  5 packages aborted: my_package py_pubsub py_srvcli python_parameters turtlesim
  1 package had stderr output: pointcloud_to_laserscan

Thank you!