I am migrating my project from Visual Studio 2012 to 2017. I have selected Windows sdk V 10.0.17763.0 and and platform toolset as Visual Studio 2017 (v141) for all the projects in a solution. and target WINVER 0x0601 . Apart from this i have not made any changes .When I compile all the projects compile but i get error during Linking .There around 400 errors .I am linking the source files of static library files which belongs to other project (Added in additional include directories).Looks like most of the errors are coming from files that belongs to that project. I have even changed the toolset/sdk settings for that project. I am pretty much stuck .Unable to find out the root cause for this error .
Error LNK2019 unresolved external symbol "void __cdecl RemoveRefForStatic(class GlobalSignalSourceInfo *)" (??$RemoveRefForStatic#VGlobalSignalSourceInfo####YAXPAVGlobalSignalSourceInfo###Z) referenced in function "public: __thiscall ATL::CAtlComModule::CAtlComModule(void)" (??0CAtlComModule#ATL##QAE#XZ) CSMediaPlayer D:\CoolSign\trunk\Development\common\2008\CSMediaPlayer_CEF\COMInterface D:\CoolSign\trunk\Development\common\2008\CSMediaPlayer_CEF\COMInterface\CSMediaEngine.lib(StdAfx.obj)
Error LNK2019 unresolved external symbol "void cdecl AddRefForStatic(class GlobalSignalSourceInfo *)" (??$AddRefForStatic#VGlobalSignalSourceInfo####YAXPAVGlobalSignalSourceInfo###Z) referenced in function "long __stdcall ATL::AtlWinModuleTerm(struct ATL::_ATL_WIN_MODULE70 *,struct HINSTANCE *)" (?AtlWinModuleTerm#ATL##YGJPAU_ATL_WIN_MODULE70#1#PAUHINSTANCE__###Z) CSMediaPlayer D:\CoolSign\trunk\Development\common\2008\CSMediaPlayer_CEF\COMInterface D:\CoolSign\trunk\Development\common\2008\CSMediaPlayer_CEF\COMInterface\CSMediaEngine.lib(StdAfx.obj) 1
Error LNK2001 unresolved external symbol "void __cdecl RemoveRefForStatic(class GlobalSignalSourceInfo *)" (??$RemoveRefForStatic#VGlobalSignalSourceInfo####YAXPAVGlobalSignalSourceInfo###Z) CSMediaPlayer D:\CoolSign\trunk\Development\common\2008\CSMediaPlayer_CEF\COMInterface D:\CoolSign\trunk\Development\common\2008\CSMediaPlayer_CEF\COMInterface\CSLib.lib(criticalsection.obj) 1
Error LNK1120 18 unresolved externals CSMediaPlayer D:\CoolSign\trunk\Development\common\2008\CSMediaPlayer_CEF\COMInterface\Debug D:\CoolSign\trunk\Development\common\2008\CSMediaPlayer_CEF\COMInterface\Debug\CSMediaPlayer.dll 1
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I'm currently trying to use Open CV 4.0 with Visual Studio 2017. I've already set the project properties as such
**C/C++ -> Additinal Include Directories**
C:\Users\admin\Documents\opencv\build\include
%(AdditionalIncludeDirectories)
**Linker -> General -> Additional Library Dependencies**
C:\Users\admin\Documents\opencv\build\x64\vc15\lib
%(AdditionalLibraryDirectories)
**Linker -> General -> Additional Dependencies**
opencv_world400d.lib
However I'm getting external symbol errors
1>stdafx.cpp
1>Generating Code...
1>ConsoleSample.obj : error LNK2019: unresolved external symbol "public: __cdecl cv::Mat::operator struct _IplImage(void)const " (??BMat#cv##QEBA?AU_IplImage##XZ) referenced in function main
1>ConsoleSample.obj : error LNK2019: unresolved external symbol "int __cdecl cv::_interlockedExchangeAdd(int *,int)" (?_interlockedExchangeAdd#cv##YAHPEAHH#Z) referenced in function "public: void __cdecl cv::Mat::release(void)" (?release#Mat#cv##QEAAXXZ)
1>C:\Users\admin\Documents\SampleCode\bin64\ConsoleSampled.exe : fatal error LNK1120: 2 unresolved externals
1>Done building project "ConsoleSample.vcxproj" -- FAILED.
I've already looked around stack overflow and a lot of them said that I had to include highgui libraries, core libraries etc.. But the thing is Open CV 4.0 for Visual Studio 2017 only came with a library called "opencv_world400d.lib".
Am I missing something?
I have a DLL-project that compiles, links and works fine with Visual Studio 6.
Now I have loaded it into Visual Studio 2010. During import of the old .dsp file VS2010 asked me for conversion to .vcxproj file. After that I try to compile the newly converted project but stumble upon this strange linker error in debug build:
error LNK2019: unresolved external symbol __imp___CrtDbgReportW referenced in function "public: struct oapc_bin_head * const & __thiscall std::_Deque_const_iterator<struct oapc_bin_head *,class std::allocator<struct oapc_bin_head *> >::operator*(void)const " (??D?$_Deque_const_iterator#PAUoapc_bin_head##V?$allocator#PAUoapc_bin_head###std###std##QBEABQAUoapc_bin_head##XZ)
The _DEBUG compile switch is defined in debug mode as well as NDEBUG in release mode. Amazingly in release mode the error is quite different:
error LNK2019: unresolved external symbol "__declspec(dllimport) void __cdecl std::_Xlength_error(char const *)" (__imp_?_Xlength_error#std##YAXPBD#Z) referenced in function "protected: void __thiscall std::deque<struct oapc_bin_head *,class std::allocator<struct oapc_bin_head *> >::_Xlen(void)const " (?_Xlen#?$deque#PAUoapc_bin_head##V?$allocator#PAUoapc_bin_head###std###std##IBEXXZ)
Any ideas what got lost during project file conversion?
Thanks!
It looks like you have some sort of problem with linking to the std dll.
It can be something like building one of the two in x64 and the other in x86, just not adding the dll to your link or something similar to that.
can you post the linker command the visual studio uses?
I'm working to get libjingle working on windows7 using visual studio. I followed GYP methodology to build lib jingle and got libs after executing the libjingle.sln file.
Now, when I'm trying to run pcp_main.cc file, I got slashed with linker errors, after some work around, I was left with 5 linker errors. Can someone help me how to resolve those errors?
Error 5 error LNK1120: 4 unresolved externals C:\Users\username\documents\visual studio
2012\Projects\PCPTest\Debug\PCPTest.exe Error 3 error LNK2001:
unresolved external symbol "protected: virtual bool __thiscall
buzz::JingleInfoTask::HandleStanza(class buzz::XmlElement const *)"
(?HandleStanza#JingleInfoTask#buzz##MAE_NPBVXmlElement#2##Z) C:\Users\username\documents\visual
studio 2012\Projects\PCPTest\PCPTest\pcp_main.obj
Error 1 error LNK2001: unresolved external symbol "public: virtual int
__thiscall buzz::JingleInfoTask::ProcessStart(void)" (?ProcessStart#JingleInfoTask#buzz##UAEHXZ) C:\Users\username\documents\visual
studio 2012\Projects\PCPTest\PCPTest\pcp_main.obj
Error 2 error LNK2019: unresolved external symbol "public: void
__thiscall buzz::JingleInfoTask::RefreshJingleInfoNow(void)" (?RefreshJingleInfoNow#JingleInfoTask#buzz##QAEXXZ) referenced in
function "public: void __thiscall
AutoPortAllocator::SetXmppClient(class buzz::XmppClient *)"
(?SetXmppClient#AutoPortAllocator##QAEXPAVXmppClient#buzz###Z) C:\Users\username\documents\visual
studio 2012\Projects\PCPTest\PCPTest\pcp_main.obj
Error 4 error LNK2019: unresolved external symbol
_imp_InternetQueryOptionW#16 referenced in function "bool __cdecl talk_base::GetIeLanProxySettings(char const *,struct
talk_base::ProxyInfo *)"
(?GetIeLanProxySettings#talk_base##YA_NPBDPAUProxyInfo#1##Z) C:\Users\username\documents\visual
studio 2012\Projects\PCPTest\PCPTest\libjingle.lib(proxydetect.obj)
My include folder is pointing to
C:\Users\username\Desktop\libjingle\trunk\testing
C:\Users\username\Desktop\libjingle\trunk\
and lib folder to
C:\Users\username\Desktop\libjingle\trunk\build\Debug\lib
Additional dependencies have absolute paths of all the available libs.
C:\Users\username\Desktop\libjingle\trunk\build\Debug\lib\audio_processing_sse2.lib
C:\Users\username\Desktop\libjingle\trunk\build\Debug\lib\bitrate_controller.lib
C:\Users\username\Desktop\libjingle\trunk\build\Debug\lib\CNG.lib
...
...
...
The source codeI'm using is present here.
http://pastebin.com/GATFYWnW
Got the answer!
The Error 4 can be removed by adding the following line
#pragma comment(lib, "Wininet.lib")
The remaining errors correspond to the jingleInfoTask.cc and JingleInfotask.h files. Its a bit surprise to see that the solution file (libjingle.sln) doesnt have these files when it built libraries. The work around would be to add the jingleinfotask.cc and jingleinfotask.h files into xmpp folder and re-build the libjingle.sln file.
This will produce the jingleinfotask.obj and required lib files. Make sure you point the generated lib file in the additional dependencies section in linker section of project properties.
I need to use WebRTC in VS 2005. As far as I've found out, I need VS 2005 SP1 for this purpose. Otherwise, two link errors appear all the time:
LIBCMTD.lib(stdexcpt.obj) : error LNK2005: "public: virtual __thiscall std::exception::~exception(void)" (??1exception#std##UAE#XZ) already defined in SwitchingSampRate.obj
LIBCMTD.lib(stdexcpt.obj) : error LNK2005: "public: virtual char const * __thiscall std::exception::what(void)const" (?what#exception#std##UBEPBDXZ) already defined in SwitchingSampRate.obj
I can't install SP1 for some reason. So to avoid these errors, I tried to build WebRTC lib-files in VS 2010 and then to link them to my VS 2005 solution. However, this brings about other kinds of errors and warnings (this is in 2005, again):
warning LNK4229: invalid directive '/FAILIFMISMATCH:_MSC_VER=1600' encountered; ignored
error LNK2001: unresolved external symbol "void __cdecl std::_Xlength_error(char const *)" (?_Xlength_error#std##YAXPBD#Z)
unresolved external symbol "void (__cdecl* std::_Raise_handler)(class stdext::exception const &)" (?_Raise_handler#std##3P6AXABVexception#stdext###ZA)
I wonder, if these errors could be avoided, so that I could use the libs generated in VS 2010 in my VS 2005 project.
You can't link libs to a program built with another version of visual studio.
I can't statically link hunspell library to my C++ project in Visual Studio 2010.
I downloaded hunspell and went to hunspell-1.3.1\src\win_api folder. I opened libhunspell.vcproj file in visual studio 2010 and converted project. I built solution in Realease configuration and it generated "libhunspel.lib" file in hunspell-1.3.1\src\win_api\Release\libhunspell folder.
In my simple C++ console program that use hunpell:
I added this folder with libhunspel.lib file in Property Pages/Configuration Properties/VC++ Directories/Library Directories
I added "hunspell-1.3.1\src\" folder to Property Pages/Configuration Properties/VC++ Directories/Include Directories
and "libhunspell.lib" to Property Pages/Linker/Input/Additional Dependancies.
But it still gives me unresolved external symbol error:
Error 2 error LNK2019: unresolved external symbol "__declspec(dllimport) public: int __thiscall Hunspell::spell(char const *,int *,char * *)" (__imp_?spell#Hunspell##QAEHPBDPAHPAPAD#Z) referenced in function _main C:\Users\Me\Documents\Visual Studio 2010\Projects\hunspell_learning\hunspell_learning\main.obj hunspell_learning
Error 3 error LNK2019: unresolved external symbol "__declspec(dllimport) public: __thiscall Hunspell::Hunspell(char const *,char const *,char const *)" (__imp_??0Hunspell##QAE#PBD00#Z) referenced in function _main C:\Users\Me\Documents\Visual Studio 2010\Projects\hunspell_learning\hunspell_learning\main.obj hunspell_learning
Error 1 error LNK2019: unresolved external symbol "__declspec(dllimport) public: __thiscall Hunspell::~Hunspell(void)" (__imp_??1Hunspell##QAE#XZ) referenced in function _main C:\Users\Me\Documents\Visual Studio 2010\Projects\hunspell_learning\hunspell_learning\main.obj hunspell_learning
Error 4 error LNK1120: 3 unresolved externals C:\Users\Me\Documents\Visual Studio 2010\Projects\hunspell_learning\Debug\hunspell_learning.exe 1 1 hunspell_learning
I don't have idea what can be wrong. I also tries with dynamic library. Built Hunspell solution in Release_dll configuration and just changed Include Directories in my app to hunspell-1.3.1\src\win_api\Release_dll\libhunspell and it compiles. I only need to copy libhunspell.dll where my executable program is so dll will be loaded.
You need to put "#define HUNSPELL_STATIC" somewhere in your stdafx.h.