CMakeFiles/main.dir/sample_process.cpp.o: In function `SampleProcess::Postprocess(aclmdlDataset const*, PicDesc&, int, int)': sample_process.cpp:(.text+0x1104): undefined reference to `SampleProcess::CalculateCrc16(unsigned char volatile*, unsigned char)' collect2: error: ld returned 1 exit status src/CMakeFiles/main.dir/build.make:406: recipe for target 'main' failed make[2]: *** [main] Error 1 CMakeFiles/Makefile2:85: recipe for target 'src/CMakeFiles/main.dir/all' failed make[1]: *** [src/CMakeFiles/main.dir/all] Error 2 Makefile:129: recipe for target 'all' failed make: *** [all] Error 2

时间: 2024-04-26 19:26:39 浏览: 104
这个错误提示是链接错误,说明编译器无法找到`CalculateCrc16`函数的定义。可能是因为你在代码中只提供了函数的声明,但没有提供函数的实现。请确认你是否在代码中提供了`CalculateCrc16`函数的实现,并且该实现是否被正确地编译和链接到可执行文件中。 另外,如果你在代码中提供了`CalculateCrc16`函数的实现,但是在编译时没有正确地链接该函数的实现,也可能会导致链接错误。请确认是否正确地配置了编译器链接选项,并将`CalculateCrc16`函数的实现文件链接到可执行文件中。
相关问题

FAILED: MyTestHttp : && /usr/bin/c++ -g CMakeFiles/MyTestHttp.dir/main.cpp.o -o MyTestHttp && : /usr/bin/ld: CMakeFiles/MyTestHttp.dir/main.cpp.o: in function `Http::Http()': /home/hy-20/project/MyTestHttp/main.cpp:20: undefined reference to `curl_global_init' /usr/bin/ld: /home/hy-20/project/MyTestHttp/main.cpp:21: undefined reference to `curl_easy_init' /usr/bin/ld: CMakeFiles/MyTestHttp.dir/main.cpp.o: in function `Http::~Http()': /home/hy-20/project/MyTestHttp/main.cpp:25: undefined reference to `curl_easy_cleanup' /usr/bin/ld: /home/hy-20/project/MyTestHttp/main.cpp:26: undefined reference to `curl_global_cleanup' /usr/bin/ld: CMakeFiles/MyTestHttp.dir/main.cpp.o: in function `Http::setUrl(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)': /home/hy-20/project/MyTestHttp/main.cpp:29: undefined reference to `curl_easy_setopt' /usr/bin/ld: CMakeFiles/MyTestHttp.dir/main.cpp.o: in function `Http::setPostFields(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)': /home/hy-20/project/MyTestHttp/main.cpp:31: undefined reference to `curl_easy_setopt' /usr/bin/ld: CMakeFiles/MyTestHttp.dir/main.cpp.o: in function `Http::setMethod(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)': /home/hy-20/project/MyTestHttp/main.cpp:35: undefined reference to `curl_easy_setopt' /usr/bin/ld: /home/hy-20/project/MyTestHttp/main.cpp:36: undefined reference to `curl_easy_setopt' /usr/bin/ld: CMakeFiles/MyTestHttp.dir/main.cpp.o: in function `Http::setHeaders(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)': /home/hy-20/project/MyTestHttp/main.cpp:41: undefined reference to `curl_slist_append' /usr/bin/ld: /home/hy-20/project/MyTestHttp/main.cpp:42: undefined reference to `curl_easy_setopt' /usr/bin/ld: CMakeFiles/MyTestHttp.dir/main.cpp.o: in function `Http::setWriteFunction(std::function<void (std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)> const&)': /home/hy-20/project/MyTestHttp/main.cpp:46: undefined reference to `curl_easy_setopt' /usr/bin/ld: /home/hy-20/project/MyTestHttp/main.cpp:47: undefined reference to `curl_easy_setopt' /usr/bin/ld: CMakeFiles/MyTestHttp.dir/main.cpp.o: in function `Http::perform()': /home/hy-20/project/MyTestHttp/main.cpp:50: undefined reference to `curl_easy_perform' collect2: error: ld returned 1 exit status ninja: build stopped: subcommand failed.

这是一个链接错误,编译器找不到 curl 库的函数。你需要在链接时加上 curl 库。如果你使用的是 CMake,可以在 CMakeLists.txt 中添加以下代码: ``` find_package(CURL REQUIRED) target_link_libraries(YourProjectName ${CURL_LIBRARIES}) ``` 其中,YourProjectName 是你的项目名称。

usr/bin/ld: CMakeFiles/yolov8.dir/yolov8_generated_process.cu.o:/media/lindsay/data/tensorrt_infer_engine/x86/yolov8-tensorrtx/tensorrt7/person/include/config.h:15: multiple definition of `OUTPUT_BLOB_NAME'; CMakeFiles/yolov8.dir/yolov8.cpp.o:/media/lindsay/data/tensorrt_infer_engine/x86/yolov8-tensorrtx/tensorrt7/person/include/config.h:15: first defined here /usr/bin/ld: CMakeFiles/yolov8.dir/yolov8_generated_process.cu.o:/media/lindsay/data/tensorrt_infer_engine/x86/yolov8-tensorrtx/tensorrt7/person/include/config.h:14: multiple definition of `INPUT_BLOB_NAME'; CMakeFiles/yolov8.dir/yolov8.cpp.o:/media/lindsay/data/tensorrt_infer_engine/x86/yolov8-tensorrtx/tensorrt7/person/include/config.h:14: first defined here

根据提供的错误信息,你的代码中存在重复定义的问题。编译器指出在 `yolov8_generated_process.cu.o` 和 `yolov8.cpp.o` 文件中都重复定义了 `OUTPUT_BLOB_NAME` 和 `INPUT_BLOB_NAME` 变量。 这种错误通常发生在多个源文件中都包含了同一个头文件,并且该头文件中定义了全局变量。由于每个源文件都会被编译成独立的目标文件,因此重复定义的全局变量会导致链接时出现冲突。 要解决这个问题,你可以考虑将这些全局变量的定义放在一个单独的源文件中,并在其他需要使用这些变量的源文件中使用 `extern` 关键字进行声明。这样可以确保全局变量只有一份定义,并且可以在多个源文件中共享。 首先,在一个源文件(比如 `config.cpp`)中定义这些全局变量: ```cpp // config.cpp #include "config.h" const std::string INPUT_BLOB_NAME = "input_blob"; const std::string OUTPUT_BLOB_NAME = "output_blob"; ``` 然后,在其他源文件中使用 `extern` 关键字进行声明: ```cpp // yolov8_generated_process.cu #include "config.h" extern const std::string INPUT_BLOB_NAME; extern const std::string OUTPUT_BLOB_NAME; // 其他代码 ``` ```cpp // yolov8.cpp #include "config.h" extern const std::string INPUT_BLOB_NAME; extern const std::string OUTPUT_BLOB_NAME; // 其他代码 ``` 这样做可以确保全局变量只有一份定义,并且可以在多个源文件中共享使用。 请根据你的实际需求和代码结构,将全局变量的定义放在一个单独的源文件中,并在其他源文件中使用 `extern` 进行声明。如果问题仍然存在,请提供更多相关代码以便我们更好地帮助你解决问题。
阅读全文

相关推荐

/usr/bin/ld: CMakeFiles/global_planning_node.dir/src/global_planning_node.cpp.o: in function main.cold': global_planning_node.cpp:(.text.unlikely+0x273): undefined reference to tf::TransformListener::~TransformListener()' /usr/bin/ld: CMakeFiles/global_planning_node.dir/src/global_planning_node.cpp.o: in function main': global_planning_node.cpp:(.text.startup+0xc64): undefined reference to tf::Transformer::DEFAULT_CACHE_TIME' /usr/bin/ld: global_planning_node.cpp:(.text.startup+0xc92): undefined reference to tf::TransformListener::TransformListener(ros::Duration, bool)' /usr/bin/ld: global_planning_node.cpp:(.text.startup+0xd7a): undefined reference to tf::Transformer::lookupTransform(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::_cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, ros::Time const&, tf::StampedTransform&) const' /usr/bin/ld: global_planning_node.cpp:(.text.startup+0xe74): undefined reference to tf::TransformListener::~TransformListener()' collect2: error: ld returned 1 exit status make[2]: *** [CMakeFiles/global_planning_node.dir/build.make:246: /home/juan/catkin_ws/devel/.private/putn/lib/putn/global_planning_node] Error 1 make[1]: *** [CMakeFiles/Makefile2:207: CMakeFiles/global_planning_node.dir/all] Error 2 make[1]: *** Waiting for unfinished jobs.... /usr/bin/ld: CMakeFiles/local_obs_node.dir/src/local_obs.cpp.o: in function rcvVelodyneCallBack(sensor_msgs::PointCloud2<std::allocator<void> > const&)': local_obs.cpp:(.text+0xa0b): undefined reference to tf::Transformer::waitForTransform(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, ros::Time const&, ros::Duration const&, ros::Duration const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*) const' /usr/bin/ld: local_obs.cpp:(.text+0xc74): undefined reference to tf::TransformListener::transformPoint(std::cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, geometry_msgs::PointStamped<std::allocator<void> > const&, geometry_msgs::PointStamped<std::allocator<void> >&) const' /usr/bin/ld: CMakeFiles/local_obs_node.dir/src/local_obs.cpp.o: in function main.cold': local_obs.cpp:(.text.unlikely+0x37d): undefined reference to tf::TransformListener::~TransformListener()' /usr/bin/ld: CMakeFiles/local_obs_node.dir/src/local_obs.cpp.o: in function main':local_obs.cpp:(.text.startup+0x62a): undefined reference to tf::Transformer::DEFAULT_CACHE_TIME' /usr/bin/ld: local_obs.cpp:(.text.startup+0x64d): undefined reference to tf::TransformListener::TransformListener(ros::Duration, bool)' /usr/bin/ld: local_obs.cpp:(.text.startup+0x6dc): undefined reference to tf::TransformListener::~TransformListener()' collect2: error: ld returned 1 exit status make[2]: *** [CMakeFiles/local_obs_node.dir/build.make:246: /home/juan/catkin_ws/devel/.private/putn/lib/putn/local_obs_node] Error 1 make[1]: *** [CMakeFiles/Makefile2:612: CMakeFiles/local_obs_node.dir/all] Error 2 make: *** [Makefile:141: all] Error 2解释编译时出现这个问题的原因,并说说如何解决

In member function ‘virtual bool xarm_control::XArmHW::init(ros::NodeHandle&, ros::NodeHandle&)’: /home/sparks/xarm_ws/src/xarm_ros/xarm_controller/src/xarm_hw.cpp:155:3: error: ‘hw_nh_’ was not declared in this scope; did you mean ‘hw_ns_’? 155 | hw_nh_ = robot_hw_nh; | ^~~~~~ | hw_ns_ /home/sparks/xarm_ws/src/xarm_ros/xarm_controller/src/xarm_hw.cpp:156:3: error: ‘root_nh_’ was not declared in this scope; did you mean ‘root_nh’? 156 | root_nh_ = root_nh; | ^~~~~~~~ | root_nh /home/sparks/xarm_ws/src/xarm_ros/xarm_controller/src/xarm_hw.cpp:206:3: error: ‘locked_ip_key_’ was not declared in this scope 206 | locked_ip_key_ = "/uf_robot/" + robot_ip; | ^~~~~~~~~~~~~~ /home/sparks/xarm_ws/src/xarm_ros/xarm_controller/src/xarm_hw.cpp:225:48: error: no matching function for call to ‘xarm_api::XArmDriver::init(ros::NodeHandle&, std::string&, bool)’ 225 | xarm_driver_.init(robot_hw_nh, robot_ip, true); | ^ In file included from /home/sparks/xarm_ws/src/xarm_ros/xarm_controller/include/xarm_controller/xarm_hw.h:36, from /home/sparks/xarm_ws/src/xarm_ros/xarm_controller/src/xarm_hw.cpp:8: /home/sparks/xarm_ws/src/xarm_ros/xarm_api/include/xarm_api/xarm_driver.h:21:14: note: candidate: ‘void xarm_api::XArmDriver::init(ros::NodeHandle&, std::string&)’ 21 | void init(ros::NodeHandle& root_nh, std::string &server_ip); | ^~~~ /home/sparks/xarm_ws/src/xarm_ros/xarm_api/include/xarm_api/xarm_driver.h:21:14: note: candidate expects 2 arguments, 3 provided /home/sparks/xarm_ws/src/xarm_ros/xarm_controller/src/xarm_hw.cpp: In destructor ‘virtual xarm_control::XArmHW::~XArmHW()’: /home/sparks/xarm_ws/src/xarm_ros/xarm_controller/src/xarm_hw.cpp:258:3: error: ‘root_nh_’ was not declared in this scope 258 | root_nh_.setParam(locked_ip_key_, false); | ^~~~~~~~ /home/sparks/xarm_ws/src/xarm_ros/xarm_controller/src/xarm_hw.cpp:258:21: error: ‘locked_ip_key_’ was not declared in this scope 258 | root_nh_.setParam(locked_ip_key_, false); | ^~~~~~~~~~~~~~ /home/sparks/xarm_ws/src/xarm_ros/xarm_controller/src/xarm_hw.cpp: In member function ‘virtual void xarm_control::XArmHW::write(const ros::Time&, const ros::Duration&)’: /home/sparks/xarm_ws/src/xarm_ros/xarm_controller/src/xarm_hw.cpp:456:5: error: ‘hw_nh_’ was not declared in this scope; did you mean ‘hw_ns_’? 456 | hw_nh_.param<float>("velo_duration", velo_duration, VELO_DURATION); | ^~~~~~ | hw_ns_ /home/sparks/xarm_ws/src/xarm_ros/xarm_controller/src/xarm_hw.cpp:456:18: error: expected primary-expression before ‘float’ 456 | hw_nh_.param<float>("velo_duration", velo_duration, VELO_DURATION); | ^~~~~ make[2]: *** [xarm_ros/xarm_controller/CMakeFiles/xarm_hw.dir/build.make:63:xarm_ros/xarm_controller/CMakeFiles/xarm_hw.dir/src/xarm_hw.cpp.o] 错误 1 make[1]: *** [CMakeFiles/Makefile2:6937:xarm_ros/xarm_controller/CMakeFiles/xarm_hw.dir/all] 错误 2 make: *** [Makefile:141:all] 错误 2 如何解决

编译报错如下:CMakeFiles/t3_node.dir/src/main.cpp.o: In function boost::asio::ssl::detail::openssl_init_base::do_init::~do_init()': main.cpp:(.text._ZN5boost4asio3ssl6detail17openssl_init_base7do_initD2Ev[_ZN5boost4asio3ssl6detail17openssl_init_base7do_initD5Ev]+0x12): undefined reference to CONF_modules_unload' CMakeFiles/t3_node.dir/src/main.cpp.o: In function boost::asio::error::detail::ssl_category::message[abi:cxx11](int) const': main.cpp:(.text._ZNK5boost4asio5error6detail12ssl_category7messageB5cxx11Ei[_ZNK5boost4asio5error6detail12ssl_category7messageB5cxx11Ei]+0x2c): undefined reference to ERR_reason_error_string' main.cpp:(.text._ZNK5boost4asio5error6detail12ssl_category7messageB5cxx11Ei[_ZNK5boost4asio5error6detail12ssl_category7messageB5cxx11Ei]+0x48): undefined reference to ERR_lib_error_string' main.cpp:(.text._ZNK5boost4asio5error6detail12ssl_category7messageB5cxx11Ei[_ZNK5boost4asio5error6detail12ssl_category7messageB5cxx11Ei]+0x59): undefined reference to ERR_func_error_string' collect2: error: ld returned 1 exit status t3/CMakeFiles/t3_node.dir/build.make:318: recipe for target '/smartview/devel/lib/t3/t3_node' failed make[2]: *** [/smartview/devel/lib/t3/t3_node] Error 1 CMakeFiles/Makefile2:3555: recipe for target 't3/CMakeFiles/t3_node.dir/all' failed make[1]: *** [t3/CMakeFiles/t3_node.dir/all] Error 2 make[1]: *** Waiting for unfinished jobs.... [ 96%] Built target play_node [100%] Built target smartview_handler Makefile:145: recipe for target 'all' failed make: *** [all] Error 2 Invoking "make -j20 -l20" failed

/root/catkin_uc/src/usb_cam/src/camera_driver.cpp: In destructor ‘virtual usb_cam::AbstractV4LUSBCam::~AbstractV4LUSBCam()’: /root/catkin_uc/src/usb_cam/src/camera_driver.cpp:231:5: error: ‘av_packet_free’ was not declared in this scope av_packet_free(&avpkt); ^~~~~~~~~~~~~~ /root/catkin_uc/src/usb_cam/src/camera_driver.cpp:231:5: note: suggested alternative: ‘av_packet_ref’ av_packet_free(&avpkt); ^~~~~~~~~~~~~~ av_packet_ref /root/catkin_uc/src/usb_cam/src/camera_driver.cpp: In static member function ‘static bool usb_cam::AbstractV4LUSBCam::init_decoder()’: /root/catkin_uc/src/usb_cam/src/camera_driver.cpp:371:13: error: ‘av_packet_alloc’ was not declared in this scope avpkt = av_packet_alloc(); ^~~~~~~~~~~~~~~ /root/catkin_uc/src/usb_cam/src/camera_driver.cpp:371:13: note: suggested alternative: ‘av_image_alloc’ avpkt = av_packet_alloc(); ^~~~~~~~~~~~~~~ av_image_alloc /root/catkin_uc/src/usb_cam/src/camera_driver.cpp: In static member function ‘static bool usb_cam::AbstractV4LUSBCam::decode_ffmpeg(const void*, int, usb_cam::camera_image_t*)’: /root/catkin_uc/src/usb_cam/src/camera_driver.cpp:771:8: error: ‘avcodec_send_packet’ was not declared in this scope if(avcodec_send_packet(avcodec_context, avpkt) < 0) ^~~~~~~~~~~~~~~~~~~ /root/catkin_uc/src/usb_cam/src/camera_driver.cpp:771:8: note: suggested alternative: ‘avcodec_get_name’ if(avcodec_send_packet(avcodec_context, avpkt) < 0) ^~~~~~~~~~~~~~~~~~~ avcodec_get_name /root/catkin_uc/src/usb_cam/src/camera_driver.cpp:784:9: error: ‘avcodec_receive_frame’ was not declared in this scope if (avcodec_receive_frame(avcodec_context, avframe_camera) < 0) ^~~~~~~~~~~~~~~~~~~~~ /root/catkin_uc/src/usb_cam/src/camera_driver.cpp:784:9: note: suggested alternative: ‘avcodec_free_frame’ if (avcodec_receive_frame(avcodec_context, avframe_camera) < 0) ^~~~~~~~~~~~~~~~~~~~~ avcodec_free_frame usb_cam/CMakeFiles/v4l_driver.dir/build.make:110: recipe for target 'usb_cam/CMakeFiles/v4l_driver.dir/src/camera_driver.cpp.o' failed make[2]: *** [usb_cam/CMakeFiles/v4l_driver.dir/src/camera_driver.cpp.o] Error 1 CMakeFiles/Makefile2:656: recipe for target 'usb_cam/CMakeFiles/v4l_driver.dir/all' failed make[1]: *** [usb_cam/CMakeFiles/v4l_driver.dir/all] Error 2 Makefile:140: recipe for target 'all' failed make: *** [all] Error 2

/home/AQTJClient/AQTJAuditClient/depends/msgpack-c-master/include/msgpack/v1/object.hpp:664:34: error: ‘void* memcpy(void*, const void*, size_t)’ copying an object of non-trivial type ‘struct msgpack::v2::object’ from an array of ‘const msgpack_object’ {aka ‘const struct msgpack_object’} [-Werror=class-memaccess] std::memcpy(&o, &v, sizeof(v)); ^ In file included from /home/AQTJClient/AQTJAuditClient/depends/msgpack-c-master/include/msgpack/object_fwd.hpp:17, from /home/AQTJClient/AQTJAuditClient/depends/msgpack-c-master/include/msgpack/v1/adaptor/adaptor_base_decl.hpp:14, from /home/AQTJClient/AQTJAuditClient/depends/msgpack-c-master/include/msgpack/adaptor/adaptor_base_decl.hpp:13, from /home/AQTJClient/AQTJAuditClient/depends/msgpack-c-master/include/msgpack/adaptor/adaptor_base.hpp:13, from /home/AQTJClient/AQTJAuditClient/depends/msgpack-c-master/include/msgpack/v1/object_decl.hpp:16, from /home/AQTJClient/AQTJAuditClient/depends/msgpack-c-master/include/msgpack/object_decl.hpp:14, from /home/AQTJClient/AQTJAuditClient/depends/msgpack-c-master/include/msgpack/object.hpp:13, from /home/AQTJClient/AQTJAuditClient/depends/msgpack-c-master/include/msgpack.hpp:10, from /home/AQTJClient/AQTJAuditClient/depends/msgpack-c-master/example/cpp03/stream.cpp:10: /home/AQTJClient/AQTJAuditClient/depends/msgpack-c-master/include/msgpack/v2/object_fwd.hpp:23:8: note: ‘struct msgpack::v2::object’ declared here struct object : v1::object { ^~~~~~ cc1plus: all warnings being treated as errors make[2]: *** [example/cpp03/CMakeFiles/stream.dir/build.make:63:example/cpp03/CMakeFiles/stream.dir/stream.cpp.o] 错误 1 make[2]: 离开目录“/home/AQTJClient/AQTJAuditClient/depends/msgpack-c-master” make[1]: *** [CMakeFiles/Makefile2:415:example/cpp03/CMakeFiles/stream.dir/all] 错误 2 make[1]: 离开目录“/home/AQTJClient/AQTJAuditClient/depends/msgpack-c-master”

[ 12%] Building CXX object usb_cam/CMakeFiles/v4l_driver.dir/src/camera_driver.cpp.o /root/catkin_uc/src/usb_cam/src/camera_driver.cpp: In destructor ‘virtual usb_cam::AbstractV4LUSBCam::~AbstractV4LUSBCam()’: /root/catkin_uc/src/usb_cam/src/camera_driver.cpp:239:5: error: ‘av_packet_free’ was not declared in this scope av_packet_free(&avpkt); ^~~~~~~~~~~~~~ /root/catkin_uc/src/usb_cam/src/camera_driver.cpp:239:5: note: suggested alternative: ‘av_packet_ref’ av_packet_free(&avpkt); ^~~~~~~~~~~~~~ av_packet_ref /root/catkin_uc/src/usb_cam/src/camera_driver.cpp: In static member function ‘static bool usb_cam::AbstractV4LUSBCam::init_decoder()’: /root/catkin_uc/src/usb_cam/src/camera_driver.cpp:379:13: error: ‘av_packet_alloc’ was not declared in this scope avpkt = av_packet_alloc(); ^~~~~~~~~~~~~~~ /root/catkin_uc/src/usb_cam/src/camera_driver.cpp:379:13: note: suggested alternative: ‘av_image_alloc’ avpkt = av_packet_alloc(); ^~~~~~~~~~~~~~~ av_image_alloc /root/catkin_uc/src/usb_cam/src/camera_driver.cpp: In static member function ‘static bool usb_cam::AbstractV4LUSBCam::decode_ffmpeg(const void*, int, usb_cam::camera_image_t*)’: /root/catkin_uc/src/usb_cam/src/camera_driver.cpp:779:8: error: ‘avcodec_send_packet’ was not declared in this scope if(avcodec_send_packet(avcodec_context, avpkt) < 0) ^~~~~~~~~~~~~~~~~~~ /root/catkin_uc/src/usb_cam/src/camera_driver.cpp:779:8: note: suggested alternative: ‘av_append_packet’ if(avcodec_send_packet(avcodec_context, avpkt) < 0) ^~~~~~~~~~~~~~~~~~~ av_append_packet /root/catkin_uc/src/usb_cam/src/camera_driver.cpp:792:9: error: ‘avcodec_receive_frame’ was not declared in this scope if (avcodec_receive_frame(avcodec_context, avframe_camera) < 0) ^~~~~~~~~~~~~~~~~~~~~ /root/catkin_uc/src/usb_cam/src/camera_driver.cpp:792:9: note: suggested alternative: ‘avcodec_free_frame’ if (avcodec_receive_frame(avcodec_context, avframe_camera) < 0) ^~~~~~~~~~~~~~~~~~~~~ avcodec_free_frame usb_cam/CMakeFiles/v4l_driver.dir/build.make:110: recipe for target 'usb_cam/CMakeFiles/v4l_driver.dir/src/camera_driver.cpp.o' failed make[2]: *** [usb_cam/CMakeFiles/v4l_driver.dir/src/camera_driver.cpp.o] Error 1 CMakeFiles/Makefile2:656: recipe for target 'usb_cam/CMakeFiles/v4l_driver.dir/all' failed make[1]: *** [usb_cam/CMakeFiles/v4l_driver.dir/all] Error 2 Makefile:140: recipe for target 'all' failed make: *** [all] Error 2 Invoking "make -j4 -l4" failed

最新推荐

recommend-type

ARCore(Android的增强现实):ARCore性能优化与调试技巧.docx

ARCore(Android的增强现实):ARCore性能优化与调试技巧
recommend-type

停止维护 基于 ReactNative、Redux 的漫画.zip

停止维护 基于 ReactNative、Redux 的漫画
recommend-type

HIKVISION海康威视DS-7916N-E4 DS-7932N-E4录像机固件V3.4.106 build 200619

HIKVISION海康威视DS-7916N-E4 DS-7932N-E4硬盘录像机固件V3.4.106 build 200619版(2020年6月22日发布) 新版固件支持解绑萤石云功能。 注意: 设备升级有风险,请确认是否一定要升级设备。 请确认升级程序包是否适用于您的设备。 在设备升级过程中请勿断电。
recommend-type

2001-2023年上市公司企业平台生态嵌入数据含原始数据+计算代码+计算结果-最新出炉.zip

2001-2023年上市公司企业平台生态嵌入数据含原始数据+计算代码+计算结果-最新出炉.zip
recommend-type

IEEE 14总线系统Simulink模型开发指南与案例研究

资源摘要信息:"IEEE 14 总线系统 Simulink 模型是基于 IEEE 指南而开发的,可以用于多种电力系统分析研究,比如短路分析、潮流研究以及互连电网问题等。模型具体使用了 MATLAB 这一数学计算与仿真软件进行开发,模型文件为 Fourteen_bus.mdl.zip 和 Fourteen_bus.zip,其中 .mdl 文件是 MATLAB 的仿真模型文件,而 .zip 文件则是为了便于传输和分发而进行的压缩文件格式。" IEEE 14总线系统是电力工程领域中用于仿真实验和研究的基础测试系统,它是根据IEEE(电气和电子工程师协会)的指南设计的,目的是为了提供一个标准化的测试平台,以便研究人员和工程师可以比较不同的电力系统分析方法和优化技术。IEEE 14总线系统通常包括14个节点(总线),这些节点通过一系列的传输线路和变压器相互连接,以此来模拟实际电网中各个电网元素之间的电气关系。 Simulink是MATLAB的一个附加产品,它提供了一个可视化的环境用于模拟、多域仿真和基于模型的设计。Simulink可以用来模拟各种动态系统,包括线性、非线性、连续时间、离散时间以及混合信号系统,这使得它非常适合电力系统建模和仿真。通过使用Simulink,工程师可以构建复杂的仿真模型,其中就包括了IEEE 14总线系统。 在电力系统分析中,短路分析用于确定在特定故障条件下电力系统的响应。了解短路电流的大小和分布对于保护设备的选择和设置至关重要。潮流研究则关注于电力系统的稳态操作,通过潮流计算可以了解在正常运行条件下各个节点的电压幅值、相位和系统中功率流的分布情况。 在进行互连电网问题的研究时,IEEE 14总线系统也可以作为一个测试案例,研究人员可以通过它来分析电网中的稳定性、可靠性以及安全性问题。此外,它也可以用于研究分布式发电、负载管理和系统规划等问题。 将IEEE 14总线系统的模型文件打包为.zip格式,是一种常见的做法,以减小文件大小,便于存储和传输。在解压.zip文件之后,用户就可以获得包含所有必要组件的完整模型文件,进而可以在MATLAB的环境中加载和运行该模型,进行上述提到的多种电力系统分析。 总的来说,IEEE 14总线系统 Simulink模型提供了一个有力的工具,使得电力系统的工程师和研究人员可以有效地进行各种电力系统分析与研究,并且Simulink模型文件的可复用性和可视化界面大大提高了工作的效率和准确性。
recommend-type

管理建模和仿真的文件

管理Boualem Benatallah引用此版本:布阿利姆·贝纳塔拉。管理建模和仿真。约瑟夫-傅立叶大学-格勒诺布尔第一大学,1996年。法语。NNT:电话:00345357HAL ID:电话:00345357https://theses.hal.science/tel-003453572008年12月9日提交HAL是一个多学科的开放存取档案馆,用于存放和传播科学研究论文,无论它们是否被公开。论文可以来自法国或国外的教学和研究机构,也可以来自公共或私人研究中心。L’archive ouverte pluridisciplinaire
recommend-type

【数据安全黄金法则】:R语言中party包的数据处理与隐私保护

![【数据安全黄金法则】:R语言中party包的数据处理与隐私保护](https://media.geeksforgeeks.org/wp-content/uploads/20220603131009/Group42.jpg) # 1. 数据安全黄金法则与R语言概述 在当今数字化时代,数据安全已成为企业、政府机构以及个人用户最为关注的问题之一。数据安全黄金法则,即最小权限原则、加密保护和定期评估,是构建数据保护体系的基石。通过这一章节,我们将介绍R语言——一个在统计分析和数据科学领域广泛应用的编程语言,以及它在实现数据安全策略中所能发挥的独特作用。 ## 1.1 R语言简介 R语言是一种
recommend-type

Takagi-Sugeno模糊控制方法的原理是什么?如何设计一个基于此方法的零阶或一阶模糊控制系统?

Takagi-Sugeno模糊控制方法是一种特殊的模糊推理系统,它通过一组基于规则的模糊模型来逼近系统的动态行为。与传统的模糊控制系统相比,该方法的核心在于将去模糊化过程集成到模糊推理中,能够直接提供系统的精确输出,特别适合于复杂系统的建模和控制。 参考资源链接:[Takagi-Sugeno模糊控制原理与应用详解](https://wenku.csdn.net/doc/2o97444da0?spm=1055.2569.3001.10343) 零阶Takagi-Sugeno系统通常包含基于规则的决策,它不包含系统的动态信息,适用于那些系统行为可以通过一组静态的、非线性映射来描述的场合。而一阶
recommend-type

STLinkV2.J16.S4固件更新与应用指南

资源摘要信息:"STLinkV2.J16.S4固件.zip包含了用于STLinkV2系列调试器的JTAG/SWD接口固件,具体版本为J16.S4。固件文件的格式为二进制文件(.bin),适用于STMicroelectronics(意法半导体)的特定型号的调试器,用于固件升级或更新。" STLinkV2.J16.S4固件是指针对STLinkV2系列调试器的固件版本J16.S4。STLinkV2是一种常用于编程和调试STM32和STM8微控制器的调试器,由意法半导体(STMicroelectronics)生产。固件是指嵌入在设备硬件中的软件,负责执行设备的低级控制和管理任务。 固件版本J16.S4中的"J16"可能表示该固件的修订版本号,"S4"可能表示次级版本或是特定于某个系列的固件。固件版本号可以用来区分不同时间点发布的更新和功能改进,开发者和用户可以根据需要选择合适的版本进行更新。 通常情况下,固件升级可以带来以下好处: 1. 增加对新芯片的支持:随着新芯片的推出,固件升级可以使得调试器能够支持更多新型号的微控制器。 2. 提升性能:修复已知的性能问题,提高设备运行的稳定性和效率。 3. 增加新功能:可能包括对调试协议的增强,或是新工具的支持。 4. 修正错误:对已知错误进行修正,提升调试器的兼容性和可靠性。 使用STLinkV2.J16.S4固件之前,用户需要确保固件与当前的硬件型号兼容。更新固件的步骤大致如下: 1. 下载固件文件STLinkV2.J16.S4.bin。 2. 打开STLink的软件更新工具(可能是ST-Link Utility),该工具由STMicroelectronics提供,用于管理固件更新过程。 3. 通过软件将下载的固件文件导入到调试器中。 4. 按照提示完成固件更新过程。 在进行固件更新之前,强烈建议用户仔细阅读相关的更新指南和操作手册,以避免因操作不当导致调试器损坏。如果用户不确定如何操作,应该联系设备供应商或专业技术人员进行咨询。 固件更新完成后,用户应该检查调试器是否能够正常工作,并通过简单的测试项目验证固件的功能是否正常。如果存在任何问题,应立即停止使用并联系技术支持。 固件文件通常位于STMicroelectronics官方网站或专门的软件支持平台上,用户可以在这里下载最新的固件文件,以及获得技术支持和更新日志。STMicroelectronics网站上还会提供固件更新工具,它是更新固件的必备工具。 由于固件涉及到硬件设备的底层操作,错误的固件升级可能会导致设备变砖(无法使用)。因此,在进行固件更新之前,用户应确保了解固件更新的风险,备份好重要数据,并在必要时寻求专业帮助。
recommend-type

"互动学习:行动中的多样性与论文攻读经历"

多样性她- 事实上SCI NCES你的时间表ECOLEDO C Tora SC和NCESPOUR l’Ingén学习互动,互动学习以行动为中心的强化学习学会互动,互动学习,以行动为中心的强化学习计算机科学博士论文于2021年9月28日在Villeneuve d'Asq公开支持马修·瑟林评审团主席法布里斯·勒菲弗尔阿维尼翁大学教授论文指导奥利维尔·皮耶昆谷歌研究教授:智囊团论文联合主任菲利普·普雷教授,大学。里尔/CRISTAL/因里亚报告员奥利维耶·西格德索邦大学报告员卢多维奇·德诺耶教授,Facebook /索邦大学审查员越南圣迈IMT Atlantic高级讲师邀请弗洛里安·斯特鲁布博士,Deepmind对于那些及时看到自己错误的人...3谢谢你首先,我要感谢我的两位博士生导师Olivier和Philippe。奥利维尔,"站在巨人的肩膀上"这句话对你来说完全有意义了。从科学上讲,你知道在这篇论文的(许多)错误中,你是我可以依