Build failed -> task in 'ns3-aqua-sim-ng' failed (exit status 1): {task 140272605382992: cxx aqua-sim-routing-dummy.cc -> aqua-sim-routing-dummy.cc.1.o} ['/usr/bin/g++', '-O0', '-ggdb', '-g3', '-Wall', '-Werror', '-std=c++11', '-Wno-error=deprecated-declarations', '-fstrict-aliasing', '-Wstrict-aliasing', '-fPIC', '-pthread', '-I.', '-I..', '-DNS3_BUILD_PROFILE_DEBUG', '-DNS3_ASSERT_ENABLE', '-DNS3_LOG_ENABLE', '-DHAVE_SYS_IOCTL_H=1', '-DHAVE_IF_NETS_H=1', '-DHAVE_NET_ETHERNET_H=1', '-DHAVE_PACKET_H=1', '-DHAVE_IF_TUN_H=1', '-DHAVE_GSL=1', '-DHAVE_SQLITE3=1', '../src/aqua-sim-ng/model/aqua-sim-routing-dummy.cc', '-c', '-o', '/home/fjl/ns-allinone-3.26/ns-3.26/build/src/aqua-sim-ng/model/aqua-sim-routing-dummy.cc.1.o']

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384 SHA-512 SHA3-224 SHA3-256 SHA3-384 SHA3-512 Keccak-224 凯卡克256 凯卡克384 Keccak-512 HMAC SHA-256 HMAC SHA-512 PBKDF2 SHA-256 PBKDF2 SHA-512 RIPEMD 160 基础58建造mkdir build && cd...

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1. **Direct3D 12基础**： - **低级API**：与Direct3D 11相比，Direct3D 12提供了更低层次的硬件访问，允许开发者更直接地控制GPU资源，提高渲染效率。 - **命令队列和命令列表**：开发者可以创建多个命令队列来...

csph.cpp:582:56: error: cannot convert ‘BLSPH::CVector3<double>’ to ‘__gnu_cxx::__alloc_traits<std::allocator<double>, double>::value_type’ {aka ‘double’} in assignment 582 | p->InternalEnergy[i] = p->OldInternalEnergy[i] - 0.5( (p->OldVelocity[i]) + 2.0(p->Velocity[i]-p->OldVelocity[i])*AveTimeStep);

这个错误是由于在第582行的赋值语句中，将 BLSPH::CVector3<double> 类型的值赋给了 p->InternalEnergy[i]，而 p->InternalEnergy[i] 的类型是 double，导致无法进行类型转换。要解决这个问题，你可以将 ...

target_compile_options(tutorial_compiler_flags INTERFACE "$<${gcc_like_cxx}:$<BUILD_INTERFACE:-Wall;-Wextra;-Wshadow;-Wformat=2;-Wunused>>" "$<${msvc_cxx}:$<BUILD_INTERFACE:-W3>>" )这段代码什么意思

- $<${msvc_cxx}:$<BUILD_INTERFACE:-W3>> 表示当编译器是 Visual Studio 或者类似于 Visual Studio 的编译器时，使用 -W3 这个编译选项。这样，其他使用了 tutorial_compiler_flags 的目标就可以自动继承...

/home/vrv/src/EDSMClient-XC_svn/MainUI3/switch.cpp:68: 错误: cannot convert ‘std::cxx11::string {aka std::cxx11::basic_string<char>}’ to ‘char*’ in assignment m_TempUserAccount = ui->lineEdit->text().toStdString(); ^

m_TempUserAccount = const_cast*>(ui->lineEdit->text().toStdString().c_str()); 这样就可以将 std::string 类型的值转换为 char* 类型，并将其赋值给 m_TempUserAccount 变量。请注意，使用 c_str() 方法...

error: invalid initialization of non-const reference of type 'std::cxx11::string& {aka std::cxx11::basic_string<char>&}' from an rvalue of type 'std::cxx11::string {aka std::cxx11::basic_string<char>}' m_pMessageControl->sendIM(imInfo, std::string()); ^~~~~~~~

这个错误是因为你传递了一个临时字符串对象（rvalue）给函数中的非常量引用参数。...m_pMessageControl->sendIM(imInfo, std::string("")); m_pMessageControl->sendIM(imInfo, "Hello, world!");

Building CXX object CMakeFiles/usb_cam.dir/src/usb_cam.cpp.o /home/q/catkin_ws/src/usb_cam/src/usb_cam.cpp: In static member function ‘static void usb_cam::UsbCam::frame_timer_callback(const ros::TimerEvent&)’: /home/q/catkin_ws/src/usb_cam/src/usb_cam.cpp:306:24: error: ‘make_unique’ is not a member of ‘std’ auto ci = std::make_unique<sensor_msgs::CameraInfo>(camera_info->getCameraInfo()); ^ /home/q/catkin_ws/src/usb_cam/src/usb_cam.cpp:306:24: note: suggested alternative: ‘__unique’ auto ci = std::make_unique<sensor_msgs::CameraInfo>(camera_info->getCameraInfo()); ^ __unique /home/q/catkin_ws/src/usb_cam/src/usb_cam.cpp:306:59: error: expected primary-expression before ‘>’ token auto ci = std::make_unique<sensor_msgs::CameraInfo>(camera_info->getCameraInfo()); ^ CMakeFiles/usb_cam.dir/build.make:62: recipe for target 'CMakeFiles/usb_cam.dir/src/usb_cam.cpp.o' failed make[2]: * [CMakeFiles/usb_cam.dir/src/usb_cam.cpp.o] Error 1 CMakeFiles/Makefile2:67: recipe for target 'CMakeFiles/usb_cam.dir/all' failed make[1]: * [CMakeFiles/usb_cam.dir/all] Error 2 Makefile:140: recipe for target 'all' failed make: *** [all] Error 2

这是一个编译错误，它指出在文件/home/q/catkin_ws/src/usb_cam/src/usb_cam.cpp的第306行中，std...set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11") 这将确保使用C++11的编译器选项来编译您的代码。

win10 下如何安装########## <?xml version="1.0"?> <name>trac_ik_lib</name> <version>1.6.6</version> <description> TRAC-IK is a faster, significantly more reliable drop-in replacement for KDL's pseudoinverse Jacobian solver. The TRAC-IK library has a very similar API to KDL's IK solver calls, except that the user passes a maximum time instead of a maximum number of search iterations. Additionally, TRAC-IK allows for error tolerances to be set independently for each Cartesian dimension (x,y,z,roll,pitch.yaw). </description> <author>Patrick Beeson</author> <author>Barrett Ames</author> <maintainer email="robotics@traclabs.com">TRACLabs Robotics</maintainer> BSD <buildtool_depend>catkin</buildtool_depend> <build_depend>boost</build_depend> <build_depend>cmake_modules</build_depend> <build_depend>eigen</build_depend> <build_depend>kdl_parser</build_depend> <build_depend>libnlopt-dev</build_depend> <build_depend condition="$ROS_DISTRO == noetic">libnlopt-cxx-dev</build_depend> <build_depend>pkg-config</build_depend> <build_depend>roscpp</build_depend> <build_depend>urdf</build_depend> <build_export_depend condition="$ROS_DISTRO == noetic">libnlopt-cxx-dev</build_export_depend> <exec_depend>boost</exec_depend> <exec_depend>kdl_parser</exec_depend> <exec_depend>libnlopt-dev</exec_depend> <exec_depend>libnlopt0</exec_depend> <exec_depend>roscpp</exec_depend> <exec_depend>urdf</exec_depend>

1. 安装虚拟机软件，例如 VMware Workstation 或 VirtualBox。 2. 下载 Ubuntu 镜像，可以从 Ubuntu 官网下载。 3. 创建一个新的虚拟机，将 Ubuntu 镜像作为虚拟机的启动盘。 4. 启动虚拟机，按照 Ubuntu 的安装...

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...

Thread 1 "runYolov3" received signal SIGSEGV, Segmentation fault. 0x000055555543ecdb in Tn::PluginFactory::createPlugin(char const, nvinfer1::Weights const, int) () (gdb) bt #0 0x000055555543ecdb in Tn::PluginFactory::createPlugin(char const, nvinfer1::Weights const, int) () #1 0x00007fffd193f7a4 in ?? () from /usr/lib/x86_64-linux-gnu/libnvparsers.so.7 #2 0x00007fffd1941a50 in ?? () from /usr/lib/x86_64-linux-gnu/libnvparsers.so.7 #3 0x00005555554440d2 in Tn::trtNet::loadModelAndCreateEngine(char const, char const, int, nvcaffeparser1::ICaffeParser, nvcaffeparser1::IPluginFactory, nvinfer1::IInt8Calibrator, nvinfer1::IHostMemory&, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > const&) () #4 0x000055555544502c in Tn::trtNet::trtNet(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&, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > const&, std::vector<std::vector<float, std::allocator<float> >, std::allocator<std::vector<float, std::allocator<float> > > > const&, Tn::RUN_MODE, int) () #5 0x000055555542011e in main ()为什么怎么解决

1. 检查代码：检查代码中是否有潜在的空指针解引用或者未初始化变量的情况。确保你的代码没有错误。 2. 检查输入数据：如果你的代码依赖于输入数据，请确保输入数据的正确性。检查输入数据的格式、大小和内容是否...

request for member ‘get_future’ in ‘task’, which is of non-class type ‘std::packaged_task<int(__gnu_cxx::__normal_iterator<int, std::vector<int> >, __gnu_cxx::__normal_iterator<int, std::vector<int> >)>(accumulate_block<__gnu_cxx::__normal_iterator<int, std::vector<int> >, int> ()())’ futures[i]=task.get_future();

这个错误的原因是task变量的类型不是一个类类型，因此不能调用get_future()函数。在这里，task的类型是一个函数类型，它返回一个std::packaged_task对象，而不是一个std::packaged_task对象本身。要解决...

Execution failed for task ':app:externalNativeBuildDebug'. > Build command failed. Error while executing process D:\NDK\android-sdk-windows\cmake\3.22.1\bin\ninja.exe with arguments {-C E:\desktop\MyApplication\app\.cxx\cmake\debug\armeabi-v7a myapplication} ninja: Entering directory E:\desktop\MyApplication\app\.cxx\cmake\debug\armeabi-v7a' [1/2] Building CXX object CMakeFiles/myapplication.dir/native-lib.cpp.o FAILED: CMakeFiles/myapplication.dir/native-lib.cpp.o D:\NDK\android-sdk-windows\ndk\21.4.7075529\toolchains\llvm\prebuilt\windows-x86_64\bin\clang++.exe --target=armv7-none-linux-androideabi24 --gcc-toolchain=D:/NDK/android-sdk-windows/ndk/21.4.7075529/toolchains/llvm/prebuilt/windows-x86_64 --sysroot=D:/NDK/android-sdk-windows/ndk/21.4.7075529/toolchains/llvm/prebuilt/windows-x86_64/sysroot -Dmyapplication_EXPORTS -g -DANDROID -fdata-sections -ffunction-sections -funwind-tables -fstack-protector-strong -no-canonical-prefixes -D_FORTIFY_SOURCE=2 -march=armv7-a -mthumb -Wformat -Werror=format-security -O0 -fno-limit-debug-info -fPIC -MD -MT CMakeFiles/myapplication.dir/native-lib.cpp.o -MF CMakeFiles\myapplication.dir\native-lib.cpp.o.d -o CMakeFiles/myapplication.dir/native-lib.cpp.o -c E:/desktop/MyApplication/app/src/main/cpp/native-lib.cpp E:/desktop/MyApplication/app/src/main/cpp/native-lib.cpp:3:10: fatal error: 'opencv2/core.hpp' file not found #include <opencv2/core.hpp> ^~~~~~~~~~~~~~~~~~ 1 error generated. ninja: build stopped: subcommand failed. * Try: > Run with --stacktrace option to get the stack trace. > Run with --info or --debug option to get more log output. > Run with --scan to get full insights.

message("OpenCV library status:") message(" version: ${OpenCV_VERSION}") message(" libraries: ${OpenCV_LIBS}") message(" include path: ${OpenCV_INCLUDE_DIRS}") 如果你已经正确导入了OpenCV库并且...

解析以下错误：CMake Error at /Users/fym/Library/Application Support/JetBrains/Toolbox/apps/CLion/ch-0/232.8453.115/CLion 2023.2 EAP.app/Contents/bin/cmake/mac/share/cmake-3.26/Modules/CMakeTestCXXCompiler.cmake:60 (message): The C++ compiler "/usr/local/bin/g++-13" is not able to compile a simple test program. It fails with the following output: Change Dir: /Users/fym/Desktop/C++/cmake-build-debug/CMakeFiles/CMakeScratch/TryCompile-HWLOEj Run Build Command(s):/Users/fym/Library/Application Support/JetBrains/Toolbox/apps/CLion/ch-0/232.8453.115/CLion 2023.2 EAP.app/Contents/bin/ninja/mac/ninja -v cmTC_1dd3b && [1/2] /usr/local/bin/g++-13 -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX13.3.sdk -fdiagnostics-color=always -o CMakeFiles/cmTC_1dd3b.dir/testCXXCompiler.cxx.o -c /Users/fym/Desktop/C++/cmake-build-debug/CMakeFiles/CMakeScratch/TryCompile-HWLOEj/testCXXCompiler.cxx [2/2] : && /usr/local/bin/g++-13 -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX13.3.sdk -Wl,-search_paths_first -Wl,-headerpad_max_install_names CMakeFiles/cmTC_1dd3b.dir/testCXXCompiler.cxx.o -o cmTC_1dd3b && : FAILED: cmTC_1dd3b : && /usr/local/bin/g++-13 -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX13.3.sdk -Wl,-search_paths_first -Wl,-headerpad_max_install_names CMakeFiles/cmTC_1dd3b.dir/testCXXCompiler.cxx.o -o cmTC_1dd3b && : ld: unsupported tapi file type '!tapi-tbd' in YAML file '/Library/Developer/CommandLineTools/SDKs/MacOSX13.3.sdk/usr/lib/libSystem.tbd' for architecture x86_64 collect2: error: ld returned 1 exit status ninja: build stopped: subcommand failed. CMake will not be able to correctly generate this project. Call Stack (most recent call first): CMakeLists.txt:2 (project) -- Configuring incomplete, errors occurred! [无法重新加载]

1. 确认C++编译器已正确安装：根据错误消息，您正在尝试使用/usr/local/bin/g++-13作为C++编译器。请确保您已经正确安装了该版本的GNU C++编译器。您可以在终端中运行以下命令来验证： shell g++-13 --...

按照你说的做，为什么会报错如下：czj@czj-virtual-machine:~/build$ cmake .. -G Ninja CMake Warning (dev) in CMakeLists.txt: No project() command is present. The top-level CMakeLists.txt file must contain a literal, direct call to the project() command. Add a line of code such as project(ProjectName) near the top of the file, but after cmake_minimum_required(). CMake is pretending there is a "project(Project)" command on the first line. This warning is for project developers. Use -Wno-dev to suppress it. -- The C compiler identification is GNU 9.4.0 -- The CXX compiler identification is GNU 9.4.0 -- Check for working C compiler: /usr/bin/cc -- Check for working C compiler: /usr/bin/cc -- works -- Detecting C compiler ABI info -- Detecting C compiler ABI info - done -- Detecting C compile features -- Detecting C compile features - done -- Check for working CXX compiler: /usr/bin/c++ -- Check for working CXX compiler: /usr/bin/c++ -- works -- Detecting CXX compiler ABI info -- Detecting CXX compiler ABI info - done -- Detecting CXX compile features -- Detecting CXX compile features - done -- Configuring done -- Generating done -- Build files have been written to: /home/czj/build czj@czj-virtual-machine:~/build$ ninja ninja: no work to do. czj@czj-virtual-machine:~/build$ sudo ninja install [sudo] czj 的密码： ninja: error: unknown target 'install'

其中，<target_name> 是要安装的目标名称，<destination_folder> 是安装目标的路径。例如： install(TARGETS my_app DESTINATION bin) 表示将 my_app 应用程序安装到 /usr/local/bin 目录下。 ...

Execution failed for task ':app:externalNativeBuildDebug'. > Build command failed. Error while executing process D:\Java\SDK\cmake\3.10.2.4988404\bin\ninja.exe with arguments {-C E:\WorkSpace\sf\JNITest\app\.cxx\cmake\debug\armeabi-v7a native-lib} ninja: Entering directory

这个错误通常发生在编译 C/C++ 代码时出现了问题。...如果以上解决方法没有解决问题，可以尝试删除 .cxx 目录，清理项目并重新构建。另外，也可以尝试在终端中执行 ./gradlew clean 命令清理项目。

[5/7] Linking CXX executable AS5600.elfFAILED: AS5600.elf cmd.exe /C "cd . && C:\Espressif\tools\riscv32-esp-elf\esp-2022r1-11.2.0\riscv32-esp-elf\bin\riscv32-esp-elf-g++.exe -march=rv32imc -nostartfiles -march=rv32imc --specs=nosys.specs @CMakeFiles\AS5600.elf.rsp -o AS5600.elf && cd ." c:/espressif/tools/riscv32-esp-elf/esp-2022r1-11.2.0/riscv32-esp-elf/bin/../lib/gcc/riscv32-esp-elf/11.2.0/../../../../riscv32-esp-elf/bin/ld.exe: esp-idf/freertos/libfreertos.a(port_common.c.obj): in function main_task': C:/Espressif/frameworks/esp-idf-v5.0/components/freertos/FreeRTOS-Kernel/portable/port_common.c:128: undefined reference to app_main' collect2.exe: error: ld returned 1 exit status

这似乎是编译器链接错误的问题，导致 undefined reference to app_main' 。这可能是由于缺少某些库或文件而导致的。你可以检查一下是否正确设置了编译器和库路径，并且是否包含了必要的库文件。...

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/home/vrv/src/EDSMClient-XC_svn/MainUI3/switch.cpp:68: 错误: cannot convert ‘std::__cxx11::string {aka std::__cxx11::basic_string<char>}’ to ‘char*’ in assignment m_TempUserAccount = ui->lineEdit->text().toStdString(); ^

error: invalid initialization of non-const reference of type 'std::__cxx11::string& {aka std::__cxx11::basic_string<char>&}' from an rvalue of type 'std::__cxx11::string {aka std::__cxx11::basic_string<char>}' m_pMessageControl->sendIM(imInfo, std::string()); ^~~~~~~~

Execution failed for task ':app:externalNativeBuildDebug'. > Build command failed. Error while executing process D:\Java\SDK\cmake\3.10.2.4988404\bin\ninja.exe with arguments {-C E:\WorkSpace\sf\JNITest\app\.cxx\cmake\debug\armeabi-v7a native-lib} ninja: Entering directory

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/home/vrv/src/EDSMClient-XC_svn/MainUI3/switch.cpp:68: 错误: cannot convert ‘std::cxx11::string {aka std::cxx11::basic_string<char>}’ to ‘char*’ in assignment m_TempUserAccount = ui->lineEdit->text().toStdString(); ^

error: invalid initialization of non-const reference of type 'std::cxx11::string& {aka std::cxx11::basic_string<char>&}' from an rvalue of type 'std::cxx11::string {aka std::cxx11::basic_string<char>}' m_pMessageControl->sendIM(imInfo, std::string()); ^~~~~~~~

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