ros2发布自定义消息时报了symbol lookup error的错误

[Zln4ever]

再运行时报错如下

[ahrs_driver_node-1] /home/ly1/imu_test/install/fdilink_ahrs/lib/fdilink_ahrs/ahrs_driver_node: symbol lookup error: /home/ly1/imu_test/install/imu_ins_gps_interfaces/lib/libimu_ins_gps_interfaces__rosidl_typesupport_fastrtps_cpp.so: undefined symbol: _ZN8std_msgs3msg24typesupport_fastrtps_cpp26max_serialized_size_HeaderERbm

当我把自定义类型的实例化对象语句屏蔽后，就不报错，看起来就是因为我实例化了自定义类型的对象引起的，代码如下

  ins_pub_ = create_publisher<imu_ins_gps_interfaces::msg::Insgps>(ins_topic.c_str(),20);

请问这是什么错误？有人遇到么？

[小鱼]

@Zln4ever 贴一下

1. 你自定义的消息接口文件
   2, 接口功能包CMakeLists.txt
2. 调用的功能包CmakeLists.txt

@小鱼 在 提问前必看！一定要看！必须看一下！ 中说：

尽量提供更多的信息（大多数问题不是别人不知道如何解决，而是不知道你的问题是什么）

[Zln4ever]

@小鱼
1.这是文件Insgps.msg
路径：imu_test/src/imu_ins_gps_interfaces/msg
ros程序路径 imu_test/src/fdlink_ahrs_ROS2/src

#ins/gps数据接口
std_msgs/Header header

float64 l_n #从坐标原点到当前向北方向的距离
float64 l_e #从坐标原点到当前向东方向的距离
float64 l_d #从坐标原点到当前向地方向的距离

2.接口功能包的CMakelist.txt

cmake_minimum_required(VERSION 3.5)
project(imu_ins_gps_interfaces)

# Default to C99
if(NOT CMAKE_C_STANDARD)
  set(CMAKE_C_STANDARD 99)
endif()

# Default to C++14
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 dependencies
find_package(ament_cmake REQUIRED)
# uncomment the following section in order to fill in
# further dependencies manually.
# find_package(<dependency> REQUIRED)
#find_package(sensor_msgs REQUIRED)
find_package(std_msgs REQUIRED)

if(BUILD_TESTING)
  find_package(ament_lint_auto REQUIRED)
  # the following line skips the linter which checks for copyrights
  # uncomment the line when a copyright and license is not present in all source files
  #set(ament_cmake_copyright_FOUND TRUE)
  # the following line skips cpplint (only works in a git repo)
  # uncomment the line when this package is not in a git repo
  #set(ament_cmake_cpplint_FOUND TRUE)
  ament_lint_auto_find_test_dependencies()
endif()
find_package(rosidl_default_generators REQUIRED)

rosidl_generate_interfaces(${PROJECT_NAME}
  "msg/Insgps.msg"
   DEPENDENCIES
 )
ament_package()

3.功能包的Cmakelist.txt

cmake_minimum_required(VERSION 3.5)
project(fdilink_ahrs)

# Default to C99
if(NOT CMAKE_C_STANDARD)
  set(CMAKE_C_STANDARD 99)
endif()

# Default to C++14
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(Eigen3 REQUIRED)
set(Eigen3_INCLUDE_DIRS ${EIGEN3_INCLUDE_DIR})

# find dependencies
find_package(ament_cmake REQUIRED)
find_package(rclcpp REQUIRED)
find_package(rclpy REQUIRED)
find_package(sensor_msgs REQUIRED)
find_package(std_msgs REQUIRED)
find_package(tf2 REQUIRED)
find_package(tf2_ros REQUIRED)
find_package(serial REQUIRED)
find_package(imu_ins_gps_interfaces REQUIRED)

if(BUILD_TESTING)
  find_package(ament_lint_auto REQUIRED)
  # the following line skips the linter which checks for copyrights
  # uncomment the line when a copyright and license is not present in all source files
  #set(ament_cmake_copyright_FOUND TRUE)
  # the following line skips cpplint (only works in a git repo)
  # uncomment the line when this package is not in a git repo
  #set(ament_cmake_cpplint_FOUND TRUE)
  ament_lint_auto_find_test_dependencies()
endif()

include_directories(
  include
  src
  ${catkin_INCLUDE_DIRS}
  ${Eigen3_INCLUDE_DIRS} 
)


add_executable(ahrs_driver_node src/ahrs_driver.cpp src/crc_table.cpp)
ament_target_dependencies(ahrs_driver_node rclcpp rclpy  std_msgs  sensor_msgs  serial tf2_ros tf2 imu_ins_gps_interfaces)


add_executable(imu_tf_node src/imu_tf.cpp)
ament_target_dependencies(imu_tf_node rclcpp rclpy std_msgs sensor_msgs serial tf2_ros tf2 imu_ins_gps_interfaces)

# find_package(Boost 1.55.0 REQUIRED COMPONENTS system filesystem)
# include_directories(ahrs_driver_node ${Boost_INCLOUDE_DIRS})
# link_directories(ahrs_driver_node ${Boost_LIBRARY_DIRS})
# target_link_libraries(ahrs_driver_node ${Boost_LIBRSRIES})

install(TARGETS
  ahrs_driver_node
  imu_tf_node

  DESTINATION lib/${PROJECT_NAME}
)

install(
  DIRECTORY launch 
  DESTINATION share/${PROJECT_NAME}
)

ament_package()

[小鱼]

@Zln4ever 问题出在这里,你用到了std_msgs应该添加依赖.

在 ros2发布自定义消息时报了symbol lookup error的错误 中说：

rosidl_generate_interfaces(${PROJECT_NAME}
"msg/Insgps.msg"
DEPENDENCIES
)

正确写法

rosidl_generate_interfaces(${PROJECT_NAME}
  "msg/Insgps.msg"
   DEPENDENCIES std_msgs
 )

[Zln4ever]

@小鱼 ok鱼哥 解决了 学到了 。然后也会注意一下提问方式。