Ros undefined reference to main text+0x13): undefined reference to `func' <br /> 关于undefined reference这样的问题，网上也有很多的说法，在此，我以详细地示例给出其中的各种原因说明以及解决 Jan 21, 2025 · 当你在使用 g++ 编译器编译一个 C++ 程序时，遇到错误信息 "undefined reference to main" 通常意味着编译器在链接阶段未能找到程序的入口点，即 main 函数。这个错误通常有几个可能的原因： 拼写或语法错误：首先检查你的 main 函数声明是否正确。 Tour Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Thanks for contributing an answer to Robotics Stack Exchange! Please be sure to answer the question. 04 and ROS kinetic). a. h" #include "std_msgs/String. cpp. Provide details and share your research! But avoid …. Tour Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Jun 16, 2020 · find_package(catkin REQUIRED COMPONENTS message_generation message_runtime roscpp std_msgs Eigen3 ) You appear to be missing geometric_shapes in this list. Thanks for contributing an answer to Robotics Stack Exchange! Please be sure to answer the question. I am using catkin_make_isolated to build the workspace because of the existence of a non catkin package in the workspace. cpp -o test_gui -g -I /usr/local/includ Aug 20, 2012 · Related Question c++ undefined reference to `main' while compiling Undefined Reference when compiling with cmake Undefined Reference when Compiling to Executable Undefined reference to `main' , when main exist 'undefined reference to' when compiling with g++ undefined reference to … when compiling ros node Undefined Reference when compiling Jan 10, 2025 · Based in Munich, our engineers & laboratory helps you to develop your product from the first idea to certification & production. 0) set(CMAKE_CXX_STANDARD 11) project(conti_radar) find Tour Start here for a quick overview of the site Help Center Detailed answers to any questions you might have 文章浏览阅读2w次，点赞9次，收藏24次。最近在Linux下编程发现一个诡异的现象，就是在链接一个静态库的时候总是报错，类似下面这样的错误：(. txt as suggested above. I edited the CMakeLists. stackexchange. 我查了很多网上资料. I already had the roscpp included as a catkin required component, so I still couldn't understand what the root of the problem was. #include "ros/ros. . text+0x13): undefined reference to `func' 关于undefined reference这样的问题，大家其实经常会遇到，在此，我以详细地示例给出常见错误的各种原因以及解决方法 Thanks for contributing an answer to Robotics Stack Exchange! Please be sure to answer the question. My problem is that this library required pthread to compile. org is deprecated as of August the 11th, 2023. cpp:(. The serial port dependency had been installed via sudo apt-get. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Feb 12, 2019 · Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. Aug 15, 2016 · In my project, I want to use xbee external library with ROS. In any case, if I have understood well you are using micro_ros_platformio, and this package does not have example_interfaces package built by default, check here. 可知，问题在于没有链接到ros库 Aug 21, 2023 · 提问时一定要提供尽可能多的信息(系统版本，ros版本，前后操作，终端日志)，包括你的目的，比如你其实想装装某个库遇到问题，不要只说这个问题，因为可能有更好的替代方案 Jul 29, 2019 · That should work, but there's a problem: find_package() only supports finding one package per call. I tend to give locations more explicitly during linking, like: I was able to fix this by not having the RViz tutorial headers and sources globbed into the library in the CMakeLists. txt: Nov 3, 2021 · Question: I likely have a ROS Cpp library problem. Jul 4, 2024 · 1. cpp) creates an instance of the class barrettarm_interface in its main function. If you used main ( ) funct . ) function. notice that my source file is pretty small, non of the solutions pointed out in that duplicate work for it, and I can't go poking around all the linked header files written by the ROS developers/community. Jul 13, 2022 · 文章浏览阅读1k次。本文介绍了C++编译时遇到的undefined reference错误，特别是涉及到dlopen、dlerror、dlsym、dlclose等动态链接库函数。 Hi guys, I am trying to build my first project in ROS and so far I am amazed. In any case It seems to have problems with the parameters of methods, because if I call a method on client without any parameters for instance client. Asking for help, clarification, or responding to other answers. Since the absence of a main I've declared the class a library adding this line in the CMakeLists. But since ROS use catkin, I have to make exe file with Cmakelists. I have double and triple checked my syntax and I have run out of ideas why the compiler complains, undefined reference to foo::callback any advice on where to look would be helpful. Setup. Comment by Beaucay on 2017-01-31: thank you very much! adding this to the CMakeLists. Hello everyone ! I know there are already posts about this subject but after many tries I don't know how to resolve this problem. csdn. I have a package named as libbarrettros. ” command to “CmakeLists. When I add the talker. cpp are in the src folder in the package. Jun 2, 2016 · I'm trying to build a project with ROS, but I keep getting "undefined reference to <>" errors, for exemple : CMakeFiles/robot_controller_node. Comment by gvdhoorn on 2015-03-11: @Wolf: there is no add_library(. h Hello, I tried building a teleop_keyboard package with serial port dependency. Stack Exchange Network. text+0x1b): undefined reference to `modbus_new_tcp' scaraListen. h cannot be found, or “undefined reference” errors on ros::init or other ROS functions, the most likely reason is that your CMakeLists. So please open a new one so we can track this issue. 04 LTS) I'm working on a C++ package that uses a C library libccv. followed the ros instructions in order to get kdl up and running but i cannot get it to compile! Note: i included the find_package(Orocos-kdl) in the CMakeLists but the problem persists Tour Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Dec 21, 2016 · I don't think so @Danh, while I did consider the library linking cause in my question, but my question is more ROS related than it is C++ related. The executable node (src/libbarrettros. txt as follows: Apr 4, 2019 · undefined reference in using serial. undefined reference to `main @ Wolf: I tried commenting the data_input_output target, but the rest still presented ros::xx undefined references, so it wasn't a problem of my target, just the linker altogether. Mar 31, 2023 · undefined reference to `cv::Mat::Mat()&#039;のエラーを解決するROSでC++の中でOpenCVを使いたくてcatkin buildしたときに以下のようなエラーが出る場合の解決方法について説明する。 Mar 24, 2020 · I get linker error when I do 'catkin_make' in my workspace folder. 3. Oct 31, 2022 · Hi. I am using the vl53l5cx_api and pico_uart_transport. Jan 10, 2025 · By default, ROS2 expects you to let ROS2 (and its CMake macros) handle the linking of your executables. txt does not correctly declare a dependency on roscpp. undefined reference of ros in the main function "未定义的引用": undefined Oct 8, 2022 · Hello @ROS_Aotearoa, I guess that the correct place for this is the issues page of the Github repo you are using. Sorry for all mistakes, English is not my native language. ros. txt” in ROS will solve the “undefined hello, I'm having a lot of trouble with this one: (ros fuerte, ubuntu 12. Basically, have a separate folder for those files. cpp # I am using ROS Hydro on Ubuntu 12. 04, ROS2 Rolling; Arduino 1. txt file has following content Nov 17, 2020 · Tour Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Aug 27, 2023 · 在ROS中，ros::spin() 和 ros::spinOnce() 是两个关键的函数，用于处理节点间的通信，尤其是消息的发布和订阅。本文将深入探讨这两个函数的含义、区别以及它们在实际应用中的使用方法。 Feb 15, 2021 · Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand May 28, 2015 · It seems that the opencv_ocl library is not being linked properly. 5. That would be something to fix as well. If you first learned java, this is an understandable manner of confusion since in Java, your code usually looks like the following: //any import statements you have public class Foo{ int main(){} } Feb 19, 2021 · Attention: Answers. org/question/63656/how-to-solve-undefined-reference-to-rosinit-on-groovy/. txt, so hello cannot be linked against it. cpp(foo函数的定义文件)后，成功编译出a. Check out our post about index-symbols. But I have Problems understanding the new API. main. Nov 10, 2021 · 首先这是一个很弱智的错误，纯属文本抄错了，但我决定有必要记录一下 根据报错我们可以知道是相关函数没有被定义，其原因是缺少roscpp依赖 target_link_libraries(* ${catkin_LIBRARIES}) 这里要注意LIBRARIES不是LIBRARY，抄错了就会报这个错误（比如我） On further inspection, --std=c++11 only cured the symptom, not the root cause. ). cpp file. xml fixed the problem. text+0x135): undefined reference to `modbus_free' collect2: error: ld returned 1 exit status It seems that it's not linking to the library, but when i add Aug 15, 2020 · Tour Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Sep 22, 2016 · 当大家使用dlopen，dlsym等时可能遇到过下面的错误： undefined reference to dlopen' undefined reference todlsym’ undefined reference to `dlclose’ 如果是单个的源文件解决方法是：gcc demo. Then I have my utest. Dec 1, 2018 · It was because of the compiler that caused the undefined reference problem. out，而且执行起来更是非常顺滑～1. In particular, you need to include moveit_core and moveit_ros_planning_interface in your CMakeLists. com to ask a new question. I wanted to re-installed micro-ROS from scratch to be sure no Foxy code will be remaining and creating Undefined reference to main means the linker cannot find a reference to the main function. Another way would be to build cv_bridge and image_transport against opencv3. You're currently trying to find two packages with it, and not finding the second one, OpenCV: Jun 7, 2017 · Probably something wrong with your project. usually means that your library is compiled with different c++ compiler than your executable. o: dans la fonction « main »: Node_Robot_Controller. 执行cmake出现undefined reference toxx，显示main函数中的类成员函数调用没有声明，但是所有声明已经在MROR. I'm not cpp fluent myself, what Feb 17, 2017 · <br />最近在Linux下编程发现一个诡异的现象，就是在链接一个静态库的时候总是报错，类似下面这样的错误： (. Originally when I make exe file I use makefile. Comment by volume_8091 on 2019-04-02: Jul 4, 2019 · tf2 监听器用于订阅 ros 中的 tf 变换信息，并通过 tf2 缓冲区来获取坐标系变换。通过监听器，你可以查询在某个时间点下两个坐标系之间的变换关系，或者实时监听某两个坐标系之间的变换。 Dec 11, 2019 · 对main 未定义的引用The error: undefined reference to 'main' in C program is a very stupid mistake by the programmer, it occurs when the main() function does not exist in the program. In addition to resolving the specific “undefined reference to WinMain” error, it is crucial to review your code and project files for any other errors or issues Undefined reference to rosidl_typesupport_c__get_message_type support_handle__std_msgs__msg__Int32 0 ros2 galactic package with custom lib inside returns undefined reference So in the CMake file you would literally just type in the path to the library containing the precompiled definition of color_gist_scaletab() after the "${catkin_LIBRARIES}" in the target_link_libraries entry. commit() then it just compiles and runs. But the project works on other computers (all Ubuntu 16. I have an old ROS Fuerte project which code i wanted to reuse in an another ROS Hydro node, this code uses libserial library. h and the definition is in src/barrettarm. Aug 18, 2020 · 问题原因： 通过https://answers. I have feeling this has something to do with m CMakeLists. . I already tried: setting up a new catkin ws Jul 1, 2022 · I am facing a reference issue while building using the CMakeList. Original comments. 13; Steps to reproduce. 8. Also, you can simplify your CMakeLists. Originally posted by ROSfc on ROS Answers with karma: 54 on 2016-10-21 这是我的第一个问题！当我试图编译我的ros时，我面临着一个我无法理解的问题。我不是ros的专家用户(我希望到目前为止)，我才刚刚开始了解这个系统。 Original comments. Reload to refresh your session. txt file. cpp and child. text+0x2b): undefined reference to `modbus_connect' scaraListen. (Stand alone this all works). h filed in include folder in the package. cpp . Please visit robotics. "Undefined reference" is a linker error; it means that you used a function or class from a header, but you either didn't link to the library that implements that function or class, or if it's a function from your code, you didn't implement it. The actual problem occurred because the source tree was built using bundled Boost headers from an old version, but at link time, it was linked against a much newer Boost from the operating system creating ABI conflicts. If roboteq_motor is an actual library, but is external, then the roboteq_motor pkg should be added to the find_package(catkin . 04. During the build- The ERROR: undefined reference to `parent::parent(ros::NodeHandle&) I added the parent. So, I add pthread rt in Sep 10, 2021 · 2. This site will remain online in read-only mode during the transition and into the foreseeable future. h and *. In the wiki the author used functions, which are not Aug 12, 2024 · undefined reference to 这种是因为没有指定要链接的库,即target_link_libraries()中没有添加对应的动态的名称。源码编译阶段，生成了库函数的链接符号。却在链接的时候找不到具体的实现方式。这里根据undefined reference to的具体内容，来查看是哪个库函数。 Jan 11, 2025 · I'm currently working on a project where I want to integrate a VL53L5CX Sensor in ROS2 using micro-ROS on a Raspberry Pi Pico. Comment by skr_robo on 2016-07-14: I am facing a similar issue. h中写了. cpp to the project, It appear I have problem with Undefined reference. My cpp is not linking to some of my hpp content. Check out the example project in the pr2_moveit_tutorials. txt: The workflow is: build the isolated-package, install the isolated-package, then build the ros-package(s). Apr 24, 2017 · I am using ROS Kinetic and trying to write a program that would read two videos and publish them on two different topics. net Nov 25, 2019 · I'm trying to include libi2c from "https://github. text+0x1f1): référence indéfinie vers « trajectoryclass::trajectoryclass(ros::NodeHandle) » See full list on blog. Sep 26, 2016 · Attention: Answers. I have a node called keyboard_nav: In it I have 'include', 'launch', and 'src' folders. Apr 9, 2022 · Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. Linking seem to fail. To investigate this, I tried to compile the vanilla beginner tutorial with talker. 1) 可能MROR. txt and package. text+0x13): undefined reference to `func' <br /> 关于undefined reference这样的问题，网上也有很多的说法，在此，我以详细地示例给出其中的各种原因说明以及解决方法，然后再给出我所遇到的与大家均 This source says "If you see errors from catkin_make that the header ros/ros. I have already use pthread in my work. Here is my talker. So I migration my project to ros2 foxy, and I have following problem: Nov 13, 2017 · I am trying to use an external library (libmylib. However, in case you want to manually link your executables, you need to add the following to your CMakeLists. When it's just cpp, it works, when i add ros, it doesn't anymore. I copied the files in a undefined reference to `ros::init(int&, char**, std::string const&, unsigned int)' and more. Jan 8, 2013 · Hi! We are currently trying to migrate our project from ROS2 Foxy to Rolling. dir/src/Node_Robot_Controller. I also added in the Cmakelist Hi everyone, I have some trouble with CMakeList and implementing header files. That's most likely the problem: you're not linking against geometric_shapes, but are using a function from that library. Sep 3, 2013 · undefined reference to `KDL::Chain::~Chain()' and a lot more of undefined reference i did everything i could. 8 again. You switched accounts on another tab or window. Here is the relevant part of my code: MonocularSlamNode::MonocularSlamN Oct 21, 2015 · I solved it by deleting all the new opencv3 libraries on the system, removing ros-indigo-opencv3 and working with 2. 解决方法. Aug 20, 2012 · Strange Compiler Error: "undefined reference to 'main'" Related. I'm using ROS Melodic on Ubuntu I have a line. Comment by ravijoshi on 2016-06-06: Thanks . Hello, I am trying to build a node that subscribes to two topics using message_filters::Synchronizer with approximate policy. Ubuntu 20. If you are within an anaconda environment, library location may not be found. so) in my package ROS. In function `main': scaraListen. Apr 6, 2023 · 3. cpp，出现了"undefined reference to foo()"的问题，未能编译出可执行程序a. I've already got the camera driver running and Makefile is like this: g++ main. " I can't figure out what I'm missing. It fails to compile and returns that all implemented ros functions have undefined references. Mar 25, 2024 · <br />最近在Linux下编程发现一个诡异的现象，就是在链接一个静态库的时候总是报错，类似下面这样的错误： (. the parent. makefile error: undefined reference to Hi, I am trying to build the ros packages here. cpp with my test cases and another main function to call them. The fact that you have put both types of packages into a shared directory tree is why you are getting this error. c file that does not have int main() in the file. This is my code "test_ncurses. 二、解决方法. But I think I've made some mistake in linking OpenCV libraries. You signed out in another tab or window. The problem is I am not able to build any Arduino code once micro-ROS Rolling is installed. A solution would be to just comment the main function and then test, but that is not the solution I am looking for. I installed another version of openCV that included the cuda modules, I tried to link my workspace and my package to the new openCV and I had lots of errors like "undefined reference to 'cv_bridge::' ", "undefined reference to 'ros::init::' ", "undefined reference to 'rosbag::' ". cpp文件没有链接到项目，且cpp文件中含pcl库，可能未编译链接 Jan 10, 2025 · How to fix ROS2 undefined reference to symbol rcl_timer_call_with_info Feb 4, 2018 · You signed in with another tab or window. But since yesterday I got stuck on a problem with including a separate *. txt file a lot by using find_package to get your OpenCV configuration. c -ldl就这样直接在gcc最后加上-ldl就可以了，但是如果你遇到的是一个工程，就需要修改Cmak Nov 14, 2020 · undefined reference to `pcl::visualization::PCLVisualizer::createActorFromVTKDataSet(vtkSmartPointer<vtkDataSet> const&, vtkSmartPointer<vtkLODActor>&, bool)' i have already included all c++ source files releated i can find to my code, but it still cant build successfully. c++ linux compile error: undefined reference to `main' 10. 4. py which contains a script to find the required libraries for any missing symbol. 1 缺源文件。下面显示的是首先直接用g++编译main. cpp": // test_ncurses. com/amaork/libi2c" to use with ROS. cpp with a main function and some other functions I want to test. It worked. My problem is that: I want to write a class called Cao and call its function from the Ros file which contains the main, but when I try to catkin_make it gives me the error: undefined reference to `Cao::SayHello()'. txt But I'm stuck on s Tour Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Feb 27, 2024 · I am currently implementing rosserial with an existing project but the linker is unable to find functions I defined for rosserial: "undefined reference to start_ros_com'"*, *undefined ref Aug 2, 2019 · Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. While all the other packages are built successfully, building of the package open3d_conversions_examples throwing the following Aug 3, 2021 · 文章浏览阅读3k次。首先这是一个很弱智的错误，纯属文本抄错了，但我决定有必要记录一下根据报错我们可以知道是相关函数没有被定义，其原因是缺少roscpp依赖target_link_libraries(* ${catkin_LIBRARIES})这里要注意LIBRARIES不是LIBRARY，抄错了就会报这个错误（比如我）_undefined reference to `ros::init Oct 15, 2023 · When I get an 'undefined reference to main', it usually means that I have a . h" #include <sstream> int main(int argc, char **argv) { ros::init(argc, argv, "talker"); return 0; } The CMakeLists. cpp and listener. 2 很多地方都提到undefined referance to main, collect2: error: ld returned 1 exit status 这句话的意思是main函数那里出了问题，要么是没有main函数，要么是main函数写错了，包括stackoverflow上面也是这么说，我这里是一个分文件编写的程序，头文件都有正常引用，头文件里的 Nov 25, 2014 · I am trying to transfer a camera(non-uvc) stream program to ros platform. Does anybody else has the same issue? Dec 28, 2020 · GCC在编译-链接过程中，很常见的一种链接错误就是 **undefined reference to 'xxx'**，可能你对这种错误的解决方式已经了然于胸了，但本文要介绍的一种情况，可能你未曾注意到，如果按照往常的解决思路并不一定能帮助你解决问题。 Suddenly my caktin build does not work anymore. Hey guys, I try to convert the Raw Buffer of a ShapeShifter to its original DataType Structure. ) anywhere in the CMakeLists. The declaration of the class **arminterface** is in include/barrettarm. 2 缺目标文件。 undefined reference to `main' ignoring all the rest: you don't seem to be including any object file which contains a main(. When linking, I am getting this error: undefined reference to 'ccv_enable_default_cache()' and more undefined references to the stuff from the library Tour Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Dec 28, 2014 · The accepted answer uses system's default library location. out；然后在编译命令行加上foo. cmake_minimum_required(VERSION 3.
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