针对你遇到的“undefined reference to log4cplus::logger::getinstance”问题,这通常是因为链接器找不到log4cplus库中定义的相应函数。以下是基于你提供的提示,逐步分析和解决这个问题的建议: 检查代码中是否已包含log4cplus库 确保你的项目中已经包含了log4cplus的头文件。通常,这需要在你的代码中包含类似以下...
Logger _logger = Logger::getRoot(); Logger test = Logger::getInstance("test"); Logger subTest = Logger::getInstance("test.subtest"); for (int i = 0; i < 5; i++) { LOG4CPLUS_DEBUG(subTest, "Entering loop #" << i); } 在编译的时候,一开始直接生成可执行文件是没有问题的: g+...
{ //其他成员 public: static CSingleton* GetInstance(); int age; private: CSingleton(){}; static CSingleton* m_pInstance; }; CSingleton* CSingleton::GetInstance() { if ( m_pInstance == NULL ) //判断是否第一次调用 m_pInstance = new CSingleton(); ...
FSM.cpp:(.text+0x2a9): undefined reference to `DDSDomainParticipantFactory::get_instance()' /usr/bin/ld: FSM.cpp:(.text+0x2d2): undefined reference to `DDS_PARTICIPANT_QOS_DEFAULT' /usr/bin/ld: warning: creating DT_TEXTREL in a PIE ...
静态成员变量需要在类体外定义，类体里的只算是声明：看如下的修改：include<iostream>using namespace std;class CSingleton{ //其他成员public: static CSingleton* GetInstance(); int age; private: CSingleton(){}; static CSingleton* m_pInstance;}; CSingleton* CSingleton:...
static Singleton* instance;类中声明的静态数据，需要再类外面再定义一次，在外面加上 Singleton* Singleton::instance = 0;就行了
getInstance(conf, "word count"); // 创建并配置 Job 实例 job.setJarByClass(WordCount.class); // 设置 Job 运行的类 job.setMapperClass(TokenizerMapper.class); // 设置 Map 任务的类 job.setCombinerClass(IntSumReducer.class); // 可选:在 Map 阶段后进行部分汇总,用于减少网络传输 job.setReducer...
vkGetInstanceProc @VkCreateInstance VK_NULL :: IO HS_vkCreateInstance? Since I am trying here to keep the bindings low-level, I can just provide several helpers and let users decide how to manage obtained function pointers. That is, for every function vkXxx, I generate: type VkXxx = "vk...
Sys.WebForms.PageRequestManager.getInstance()._updateControls([], [], [], 90); When the browser goes to run that code, it’s going to expect Sys.WebForms.PageRequestManager to be defined somewhere. That somewhere happens to be in the other scripts that are loaded from script tags that l...
/*const renderedMapInstance = echarts.getInstanceByDom(ref.current); if (renderedMapInstance) { mapInstance = renderedMapInstance; } else { mapInstance = echarts.init(ref.current); } mapInstance.setOption(option);*/ myChart.setOption(option) ...