colcon build error: Target "<my_lib>" links to target "std_msgs::std_msgs__rosidl_generator_c" but the target was not found

edit

I am trying to convert the inertial_sense_ros package to ROS2 and am getting a strange error when I try to build. I am using ROS2 Foxy on Ubuntu 20.04.

Initially, I get an error that my library cannot find rclcpp

In file included from /home/boatlanding/is_ws/src/inertial-sense-ros/src/inertial_sense_ros.cpp:1:
/home/boatlanding/is_ws/src/inertial-sense-ros/include/inertial_sense_ros.h:11:10: fatal error: rclcpp/rclcpp.hpp: No such file or directory
   11 | #include "rclcpp/rclcpp.hpp"

And I get that using the following CMakeLists.txt:

cmake_minimum_required(VERSION 3.5)
project(inertial_sense_ros)

if(NOT CMAKE_CXX_STANDARD)
  set(CMAKE_CXX_STANDARD 14)
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(std_msgs REQUIRED)
find_package(geometry_msgs REQUIRED)
find_package(sensor_msgs REQUIRED)
find_package(rosidl_default_generators REQUIRED)
find_package(Threads)

# setup targets
include_directories(include
  ${ament_INCLUDE_DIRS}
  lib/inertial-sense-sdk/src #This line of CMakeList.txt stays in .external file to reference submodule
)

add_subdirectory(lib/inertial-sense-sdk)

add_library(inertial_sense_ros_lib 
        src/inertial_sense_ros.cpp
)

target_link_libraries(inertial_sense_ros_lib ${rclcpp_LIBRARIES} InertialSense pthread) # ${ament_LIBRARIES}

add_executable(inertial_sense_node src/inertial_sense_node.cpp)
add_dependencies(inertial_sense_node inertial_sense_ros_lib)

# export information to downstream packages
ament_export_dependencies(
  rosidl_default_runtime 
  rclcpp 
  sensor_msgs 
  geometry_msgs
)
ament_export_include_directories(include)
ament_export_libraries(inertial_sense_ros_lib)

ament_package()

# install artifacts
install(
  DIRECTORY include/
  DESTINATION include
)
install(
  TARGETS inertial_sense_ros_lib inertial_sense_node
  ARCHIVE DESTINATION lib
  LIBRARY DESTINATION lib
  RUNTIME DESTINATION bin
)

I tried fixing this error by simply adding the rclcpp_LIBRARIES to my target_link_libraries target_link_libraries(inertial_sense_ros_lib ${rclcpp_LIBRARIES} InertialSense pthread) adding this and trying to build with colcon build leads to the following error repeated 10-20 times:

Starting >>> inertial_sense_ros
--- stderr: inertial_sense_ros                         
CMake Error at CMakeLists.txt:55 (add_library):
  Target "inertial_sense_ros_lib" links to target
  "std_msgs::std_msgs__rosidl_generator_c" 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:55 (add_library):
  Target "inertial_sense_ros_lib" links to target
  "std_msgs::std_msgs__rosidl_typesupport_introspection_c" 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:55 (add_library):
      Target "inertial_sense_ros_lib" links to target
      "std_msgs::std_msgs__rosidl_typesupport_c" 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:55 (add_library):
      Target "inertial_sense_ros_lib" links to target
      "std_msgs::std_msgs__rosidl_generator_cpp" but the target was not found.
      Perhaps a find_package() call is missing for an IMPORTED target, or an
      ALIAS target is missing?

I'm confused by this error as it doesn't seem to be referring to a package that I could include. In fact CMake seems to be looking for a combination of two packages: std_msgs and rosidl_generator_cpp. Adding packages rosidl_generator_cpp or rosidl_typesupport_c has no effect on this error. From what I have found, rosidl_generator is usually used for custom messages and services, but in my case I don't have any. Still new to using colcon and ament so any help would be much appreciated.