Hi there, I am trying to create and export a library in a ROS2 package (named uwrt_mars_rover_hw_bridge) and then use this library in another ROS2 package (named uwrt_mars_rover_utilities) in the same workspace. However, I get a "no such file or directory" error when attempting to include header files from the library in the consumer package. I was hoping someone would be able to spot the error in my code that is causing this issue. One potential problem is that the library I am attempting to export has multiple include directories, and I would not like to change this fact as I am not the author of that code. Please let me know if you require more information about the structure of the packages.

Here is the CMakeLists.txt that is creating and exporting the library (uwrt_mars_rover_hw_bridge package):

cmake_minimum_required(VERSION 3.8)
project(uwrt_mars_rover_hw_bridge)

if ("$ENV{TARGET}" MATCHES "2021$")
set(YEAR 2021)
elseif ("ENV{TARGET}" MATCHES "2022$")
set(YEAR 2022)
else ()
set(YEAR 2021) # default year to 2021
endif ()

if(NOT CMAKE_CXX_STANDARD)
    set(CMAKE_CXX_STANDARD 20)
endif()

if(CMAKE_COMPILER_IS_GNUCXX OR CMAKE_CXX_COMPILER_ID MATCHES "Clang")
  add_compile_options(-Wall -Wextra -Wpedantic)
endif()

find_package(ament_cmake REQUIRED)
find_package(rclcpp REQUIRED)
find_package(rclcpp_components REQUIRED)

include_directories(
    include
    include/uwrt_mars_rover_utils
    can
    can/generated_${YEAR}
    )


add_library(${PROJECT_NAME}_lib SHARED
    src/hw_bridge.cpp
    can/CANMsgMap.cpp
    can/generated_${YEAR}/uwrt_mars_rover_can_wrapper.cpp
    can/generated_${YEAR}/uwrt_mars_rover_can.c
    )

ament_export_targets(${PROJECT_NAME}_lib HAS_LIBRARY_TARGET)

# Install the include directories: can, can/generated_${YEAR}, include,
    include/uwrt_mars_rover_utils
install(
    DIRECTORY can can/generated_${YEAR} include include/uwrt_mars_rover_utils
    DESTINATION include
)


install(TARGETS ${PROJECT_NAME}_lib
    EXPORT ${PROJECT_NAME}_lib
    RUNTIME DESTINATION lib
    ARCHIVE DESTINATION lib
    LIBRARY DESTINATION lib
    INCLUDES DESTINATION include
    )


ament_package()

Here is the CMakeLists.txt that is consuming the library (uwrt_mars_rover_utilities package):

cmake_minimum_required(VERSION 3.8)
project(uwrt_mars_rover_utilities)

if (NOT CMAKE_CXX_STANDARD)
    set(CMAKE_CXX_STANDARD 20)
endif ()

if(CMAKE_COMPILER_IS_GNUCXX OR CMAKE_CXX_COMPILER_ID MATCHES "Clang")
  add_compile_options(-Wall -Wextra -Wpedantic)
endif()

find_package(ament_cmake REQUIRED)
find_package(rclcpp REQUIRED)
find_package(rclcpp_components REQUIRED)
find_package(std_msgs REQUIRED)
find_package(uwrt_mars_rover_hw_bridge REQUIRED)

include_directories(include)

add_library(${PROJECT_NAME} SHARED
    src/uwrt_can.cpp
    #src/uwrt_params.cpp
)

ament_target_dependencies(${PROJECT_NAME}
    rclcpp
    std_msgs
    rclcpp_components
    uwrt_mars_rover_hw_bridge
)

target_link_libraries(${PROJECT_NAME}
    uwrt_mars_rover_hw_bridge::uwrt_mars_rover_hw_bridge_lib
)

install(TARGETS
    ${PROJECT_NAME}
    RUNTIME DESTINATION lib/${PROJECT_NAME}
    ARCHIVE DESTINATION lib/${PROJECT_NAME}
    LIBRARY DESTINATION lib/${PROJECT_NAME}
)

ament_export_include_directories(
    include
)

ament_export_dependencies(
    rclcpp
)

ament_package()

And finally, here is the error message I am recieving (I have verified that this file should exist and the file is correct):

Starting >>> uwrt_mars_rover_utilities
--- stderr: uwrt_mars_rover_utilities                               
In file included from /home/username/uwrt_ws/src/uwrt_mars_rover/uwrt_mars_rover_utilities/src/uwrt_can.cpp:4:
/home/username/uwrt_ws/src/uwrt_mars_rover/uwrt_mars_rover_utilities/include/uwrt_mars_rover_utilities/uwrt_can.h:15:10: fatal error: uwrt_mars_rover_hw_bridge/can/CANMsgMap.h: No such file or directory
   15 | #include "uwrt_mars_rover_hw_bridge/can/CANMsgMap.h"
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
make[2]: *** [CMakeFiles/uwrt_mars_rover_utilities.dir/build.make:63: CMakeFiles/uwrt_mars_rover_utilities.dir/src/uwrt_can.cpp.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:107: CMakeFiles/uwrt_mars_rover_utilities.dir/all] Error 2
make: *** [Makefile:141: all] Error 2
---
Failed   <<< uwrt_mars_rover_utilities [0.55s, exited with code 2]

Summary: 38 packages finished [7.59s]
  1 package failed: uwrt_mars_rover_utilities
  1 package had stderr output: uwrt_mars_rover_utilities