unresolved-external

问题 When loading libpng.dll dynamically, after upgrading from libpng13.dll to version 1.5, the compiler started reporting this unresolved external: png_set_longjmp_fn How come and how do I fix it? 回答1: The library was changed to hide internal structures better. So what you need to do is this: typedef jmp_buf* (*png_set_longjmp_fnPtr)(png_structp png_ptr, png_longjmp_ptr longjmp_fn, size_t jmp_buf_size); png_set_longjmp_fnPtr mypng_set_longjmp_fnPtr = 0; Then when you dynamically do a LoadLibrary,

问题 I would like to build two C++ projects in the same solution in Visual Studio 2010 that can interact with each other. I have created a solution under directory C:\Users\me\Desktop\SolutionDir . The two projects have been created respectively under C:\Users\me\Desktop\SolutionDir\FirstProject and C:\Users\me\Desktop\SolutionDir\SecondProject . My first project contains two files, a header function.h and a cpp file function.cpp function.h #pragma once void print_stuff(); function.cpp #include

问题 If you follow JetBrains' Getting Started with Node.js in WebStorm instructions, node-express specific code is highlighted correctly. However if you create your own simple node-express project, e.g. using node-express' Guide, then express specific functions such as app.get() are underlined and marked with the following warning: Unresolved function or method get() This happens even if you enable the following libraries under Settings\JavaScript\Libraries : Node.js Globals Node.js v0.10.31 Core

问题 I'm trying to use ImageMagick Magick++ for a C++ Project in VS2010. I installed the Library from here: klick Then in my Project, I added c:/program files/ImageMagick-6.6.6-Q16/include to the include folders. Then I tried to use Magick++ with this code: #include <Magick++.h> void main(int argc, char ** argv){ InitializeMagick(*argv); } But this does not work! VS2010 returns the following errors: error LNK2001: unresolved external symbol "__declspec(dllimport) void __cdecl Magick:

问题 I have a VC++ code (built using VS2008), which makes use of some static libraries (*.lib files linked statically during compile time). For ease of understanding let's refer my EXE code as "AAA.EXE" & refer the lib files as "A.lib", b.lib etc... Both the AAA.EXE code and static libraries code are built using VS2008. I see that my "AAA.EXE" is working fine in 32-bit version and showing the below linker errors when AAA.EXE is built in 64-bit mode. I have of course rebuilt the static libraries in

问题 I must be missing a basic concept with headers and includes because when I attempt to call even the simplest of a function from a separate source file I get an error: main.obj:-1: error: LNK2019: unresolved external symbol "void __cdecl buildDeck(int,int)" (?buildDeck@@YAXHH@Z) referenced in function _main deck.h #ifndef DECK_H #define DECK_H #include <QString> void buildDeck(int deckSize, int jokers); struct card { QString suit; QString color; int rank; }; #endif // DECK_H deck.cpp #include

问题 First of all, I know this question is all over this site but I have looked at almost all of them and can't seem to find out what is wrong. This is in VS 2012. Thanks. //Socket.h #pragma once #include <iostream> #include <WinSock2.h> using namespace std; const int STRLEN = 256; class Socket { protected: WSADATA wsaData; SOCKET mySocket; SOCKET myBackup; SOCKET acceptSocket; sockaddr_in myAddress; public: Socket(); ~Socket(); bool SendData( char* ); bool RecvData( char*, int ); void

问题 Could someone explain what the __imp__fprintf and __imp____iob_func unresolved external means? Because I get these errors when I'm trying to compile: 1>SDL2main.lib(SDL_windows_main.obj) : error LNK2019: unresolved external symbol __imp__fprintf referenced in function _ShowError 1>SDL2main.lib(SDL_windows_main.obj) : error LNK2019: unresolved external symbol __imp____iob_func referenced in function _ShowError 1>E:\Documents\Visual Studio 2015\Projects\SDL2_Test\Debug\SDL2_Test.exe : fatal

问题 Could someone explain what the __imp__fprintf and __imp____iob_func unresolved external means? Because I get these errors when I'm trying to compile: 1>SDL2main.lib(SDL_windows_main.obj) : error LNK2019: unresolved external symbol __imp__fprintf referenced in function _ShowError 1>SDL2main.lib(SDL_windows_main.obj) : error LNK2019: unresolved external symbol __imp____iob_func referenced in function _ShowError 1>E:\Documents\Visual Studio 2015\Projects\SDL2_Test\Debug\SDL2_Test.exe : fatal

问题 During coding in Visual Studio I got an unresolved external symbol error and I've got no idea what to do. I don't know what's wrong. Could you please decipher me? Where should I be looking for what kind of errors? 1>Form.obj : error LNK2019: unresolved external symbol "public: class Field * __thiscall Field::addField(class Field *)" (?addField@Field@@QAEPAV1@PAV1@@Z) referenced in function "public: void __thiscall Form::parse(class std::basic_stringstream<char,struct std::char_traits<char>