unresolved-external

问题 What are undefined reference/unresolved external symbol errors? What are common causes and how to fix/prevent them? Feel free to edit/add your own. 回答1: Compiling a C++ program takes place in several steps, as specified by 2.2 (credits to Keith Thompson for the reference): The precedence among the syntax rules of translation is specified by the following phases [see footnote] . Physical source file characters are mapped, in an implementation-defined manner, to the basic source character set

问题 This question already has answers here : What is an undefined reference/unresolved external symbol error and how do I fix it? (32 answers) Closed 4 years ago . I am getting an unresolved external symbol "public: __thiscall TestLanguage::TestLanguage(void)" (??0TestLanguage@@QAE@XZ) referenced in function _main The TestLanguage constructor is defined as far as I can see, however obviously the compiler can't see it. My only conclusion is that there is some sort of inclusion problems (e.g.

问题 On compiling GOBJECT in Visual Studio, I came across below two errors: Error 5 error LNK1120: 1 unresolved externals C:\gtk_compilation\glib\glib-2.46.0\build\win32\vs12\Debug\Win32\bin\gobject-2-vs12.dll gobject Error 4 error LNK2019: unresolved external symbol ___chkstk_ms referenced in function _ffi_call C:\gtk_compilation\glib\glib-2.46.0\build\win32\vs12\libffi.lib(ffi.o) gobject I recompiled the libffi using the procedure described here but with extra flags given to ./configure like

问题 What are undefined reference/unresolved external symbol errors? What are common causes and how to fix/prevent them? Feel free to edit/add your own. 回答1: Compiling a C++ program takes place in several steps, as specified by 2.2 (credits to Keith Thompson for the reference): The precedence among the syntax rules of translation is specified by the following phases [see footnote] . Physical source file characters are mapped, in an implementation-defined manner, to the basic source character set

问题 What are undefined reference/unresolved external symbol errors? What are common causes and how to fix/prevent them? Feel free to edit/add your own. 回答1: Compiling a C++ program takes place in several steps, as specified by 2.2 (credits to Keith Thompson for the reference): The precedence among the syntax rules of translation is specified by the following phases [see footnote] . Physical source file characters are mapped, in an implementation-defined manner, to the basic source character set

问题 I am writing an immutable binary search tree in c++. My terminating nodes are represented by a singleton empty node. My compiler (visual c++) seems to be having trouble resolving the protected static member that holds my singleton. I get the following error: error LNK2001: unresolved external symbol "protected: static class boost::shared_ptr > node::m_empty" (?m_empty@?$node@HH@@1V?$shared_ptr@V?$node@HH@@@boost@@A) I am assuming this means it cant resolve the static m_empty member for the

问题 I am trying to follow this tutorial: http://playcontrol.net/ewing/jibberjabber/opengl_vertex_buffer_object.html And I have received this error: unresolved external symbol _glGenBuffers After having done some research I have found that Windows only supports OpenGL 1.1 unless drivers are installed. I have Intel HD Graphics with the latest drivers supporting OpenGL 2.1. I have also read that glGenBuffers was made apart of OpenGL in version 1.5. I am not understand why I am getting these errors..

问题 I have glew version 1.9.0 I have put all the header files in the MSVS include directory and all the lib files in the lib folder. I then put the dll within the sysWOW64 folder and have added all the libs needed in the additional dependencies under the project properties which are: opengl32.lib glu32.lib glut32.lib glew32.lib glew32mx.lib glew32s.lib glew32mxs.lib However I am getting a linker error Error 1 error LNK2019: unresolved external symbol _glewInit@0 referenced in function _main C:

问题 What are undefined reference/unresolved external symbol errors? What are common causes and how to fix/prevent them? Feel free to edit/add your own. 回答1: Compiling a C++ program takes place in several steps, as specified by 2.2 (credits to Keith Thompson for the reference): The precedence among the syntax rules of translation is specified by the following phases [see footnote] . Physical source file characters are mapped, in an implementation-defined manner, to the basic source character set

问题 The link step gets undefined references for all my mysql calls: ~/private/WDI/git$ make c++ -L/usr/lib/x86_64-linux-gnu -lmysqlclient -lpthread -lz -lm -lrt -ldl -o tom tom.o Block.o IPC.o ConnectMxctl.o CI_Metadata.o Log.o tom.o: In function `connect_to_table_managers()': /home/chap/private/WDI/git/tom.cpp:128: undefined reference to `mysql_num_rows' /home/chap/private/WDI/git/tom.cpp:132: undefined reference to `mysql_num_fields' /home/chap/private/WDI/git/tom.cpp:133: undefined reference