编译Qt程序时,编译器报error: undefined reference to `MainWindow::~MainWindow()'。这是因为Qt语法较严格,不会自动生成类的析构函数,需要程序员自己编写,即便里面什么内容也没有。所以,手写好MainWindow::~MainWindow()后,再编译问题就消失了。 析构函数(Destructor)也是一种特殊的成员函数,没有返回...解决...
Eclipse c++ 中[Linker error] undefined reference to `WSAStartup@8’的解决办法 出现原因: 在Eclipse中使用MinGW编译器的API,底层调用的是windows系统的API函数,需要链接windows的库。 问题解决: 右键工程->Properties->C/C++ Build->Settings-&...
The solution is to ensure that all virtual methods that are not pure are defined. Note that a destructor must be defined even if it is declared pure-virtual [class.dtor] 简单来说,C++标准规定:对于类内所有非纯虚函数的虚方法必须被定义,而且对于未遵循该规定的代码不做提示。所以我的程序直接在链...
CMakeFiles/step-22.dir/step-22.cc.o: In function `LeftChannelBoundaryValues': /media/sf_Eclipse_Deal_II_sharedFolder/Eclipse_Win_workspace/ChannelFlowWithFlatPlateSource/src/LeftChannelBoundaryValues.h:19: undefined reference to `vtable for LeftChannelBoundaryValues' ...
最近想写个demo验证Qtconnect在第五个参数不同的情况下,各自槽函数运行在哪个线程中。为了简便,就没有创建.h和.cpp文件,直接在main函数中写的,结果在运行时就出现了 undefined reference to `vtable for * * * '这种错误。 代码如下: class SendMsg : publicQObject{Q_OBJECT}; ...
I have a c library. The build works fine. Initially, it was a DLL build. but I changed it do a static library and removed the dll export things. Then I want to use this library in a C++ project.I wrapped an extern "C" around the include of the header files to eliminate name ...
针对你提出的问题“undefined reference to `pthread_key_create@glibc_2.34'”,我将根据提供的tips分点进行回答: 确认pthread_key_create函数的作用和用法: pthread_key_create函数是POSIX线程(pthread)库中的一个函数,用于创建一个线程特定数据(Thread-Specific Data, TSD)键。这个键可以用来存储和检索每个线程私有的...
/usr/local/src/vcpkg/buildtrees/boost-thread/src/ost-1.70.0-f39e9ff502/build/../src/pthread/thread.cpp:63: undefined reference to `operator delete(void*, unsigned long)' /usr/local/src/vcpkg/installed/x64-linux/debug/lib/libboost_thread.a(thread.o): In function `tls_destructor': ...
[_ZN3gnn14TensorTemplateINS_3CPUENS_10ROW_SPARSEEfE13RowSparseCopyERNS0_IS1_NS_5DENSEEfEE]+0x12b) : undefined reference to « tbb::detail::r1::max_concurrency(tbb::detail::d1::task_arena_base const*) » cpu_row_sparse_tensor.cpp:(.text._ZN3gnn14TensorTe...
undefined reference to '_modsi3'和`__udivdi3' 【问题描述】: 自己实现printf函数来方便裸板调试打印的时,在printf函数中用到了求余%和除法/操作: 结果报错: 【问题分析】: ARM是精简指令集,对求余和除法操作基本上不支持,所以应该尽量避免上述操作。 【解决方法】: linux内核源码linux/arch/arm/lib/lib1...