Error Lnk2019 Unresolved External Symbol Extern C
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Error Lnk2019 Unresolved External Symbol __declspec(dllimport)
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Error Lnk2019 Unresolved External Symbol Winmain@16 Referenced In Function ___tmaincrtstartup
us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just error lnk2019 unresolved external symbol visual studio 2010 like you, helping each other. Join them; it only takes a minute: Sign up Unresolved external symbol error (LNK2019), after inlcuding headers up vote 3 down vote favorite I know this has been asked probably a thousand times, but I've been biting my nails on this one for a few days now. I'm fairly new to C++ error lnk2019 unresolved external symbol public __thiscall referenced in function _main and this is my first time using Visual Studio. I'm trying to modify the TORCS Racing Simulator for a competition at my University. Most of this has already been done, so only parts of what I'm posting is actually my code. But I added some new functions to it and I'm having trouble with them. The whole thing worked fine in Linux with g++ but when I try to compile it in Visual Studio 2005, I get an Unresolved external symbol error. I added a new project to the Solution, which uses functions from other projects. In this new project I call the function: getisDerbyDuel() which is declared in raceinit.h, which I included in the new project. #ifndef _RACEINIT_H_ #define _RACEINIT_H_ #define RACE_ENG_CFG "config/raceengine.xml" extern void ReInit(void); extern void ReShutdown(void); extern void ReStartNewRace(void * /* dummy */); extern void ReAddRacemanListButton(void *menuHandle); extern int ReInitCars(void); extern int ReInitTrack(void); extern void ReRaceCleanup(void); extern void ReRaceCleanDrivers(void); extern char *ReGetCurrentRaceName(void); extern char *ReGetPrevRaceName(void); extern bool getisDerbyDuel(void); extern void setisDerbyDuel(bool isDerbyDuel); ex
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Error Lnk2019 Unresolved External Symbol Void __cdecl
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Error 2 Error Lnk2019 Unresolved External Symbol
only takes a minute: Sign up error LNK2019 caused by an extern “C” function referencing another? up vote 0 down vote favorite I'm writing a DLL to replace a much older one. The new version adds a new function, foo() http://stackoverflow.com/questions/9980324/unresolved-external-symbol-error-lnk2019-after-inlcuding-headers that is more useful than bar() in the older DLL and effectively replaces it. However, I still need to have a usable bar() for legacy support. What I want are both foo() and bar() to be externally accessible, so I've written a bar() that calls the newer foo(). Header file: extern "C" void* __stdcall foo(); extern "C" void* __stdcall bar(); DLL main file: extern "C" void* foo() {} extern "C" void* bar() { foo(); } Upon attempting to build, though, http://stackoverflow.com/questions/27558704/error-lnk2019-caused-by-an-extern-c-function-referencing-another Visual Studio gives me error LNK2019: unresolved external symbol _bar@20 referenced in function _wmain I suspect I'm having some kind of scope issue, since the only unique thing about bar() seems to be that it calls other functions in the main DLL. Thanks for your time! c++ dll visual-studio-2013 lnk2019 share|improve this question edited Dec 19 '14 at 1:56 greatwolf 13.3k84181 asked Dec 19 '14 at 1:54 Sarkreth 235 Do you have any kind of main function? –Grantly Dec 19 '14 at 1:57 1 You probably didn't include your header in your dll implementation. The function prototype likely defaulted to __cdecl instead as a result. –greatwolf Dec 19 '14 at 1:58 Do you have a definition for bar()? You're not showing any. Also the linker error message asks for a mangled name of bar(), is it seen elsewhere as a declaration without the surronding extern "C" {} block? –πάντα ῥεῖ Dec 19 '14 at 2:12 @Grantly "Do you have any kind of main function?" DLL's don't require a main() function as entry point. –πάντα ῥεῖ Dec 19 '14 at 2:14 1 They certainly can, not all but many want a DLLMain for example...his compiler looks like its expecting one... –Grantly Dec 19 '14 at 2:23 | show 5 more comments active oldest votes Know someone who can answer? Share a link to this question via email, Google+, Twitter, or Faceb
of CWave-library Visual Studio Languages , Windows Desktop Development > Visual C++ https://social.msdn.microsoft.com/Forums/vstudio/en-US/1fe9372e-f555-4a3b-ab19-506730b0f320/error-lnk2019unresolved-external-symbol-extern-c-usage-of-cwavelibrary?forum=vcgeneral Question 0 Sign in to vote Hello! I use the CWave-library (http://www.codeproject.com/KB/audio-video/CWave.aspx?msg=3423306#xx3423306xx) in one application I develope. I develope my program in Virtual C++ 2008 https://www.daniweb.com/programming/software-development/threads/251641/error-lnk2019-unresolved-external-symbol Express. I get the error message: "error LNK2028: unresolved token (0A00005A) "extern "C" unsignedd_int ___stdcall waveOutClose /struct HWVEOUT___ * ) " ?waveOutClose@@$$J14YGIPAUHWAVEOUT__@@@2) referenced in error lnk2019 function "private: int __thiscall CWave::Close(void)" (?Close@CWave@@$$FAAEHXZ) And then I get 15 others similar error message. How should I solve this problem? I would highly appreciate help as fast as possible! Thanks in advance! Regards, Anders Branderud Blog Wednesday, March 31, 2010 6:54 PM Reply | Quote Answers error lnk2019 unresolved 0 Sign in to vote Try the recommendation related to a similar “unresolved external symbol” error from this discussion: http://social.msdn.microsoft.com/Forums/en-US/vcgeneral/thread/dff0c5e3-007c-430f-a4d3-350dbfce969f/. You have to either add a #pragma directive or toconfigure the project. Marked as answer by Rong-Chun Zhang Monday, April 05, 2010 2:57 AM Wednesday, March 31, 2010 7:19 PM Reply | Quote Microsoft is conducting an online survey to understand your opinion of the Msdn Web site. If you choose to participate, the online survey will be presented to you when you leave the Msdn Web site.Would you like to participate? Privacy statement Dev Centers Windows Office More... Related Sites Visual Studio Visual Studio Integrate VSIP Program Microsoft .NET Microsoft Azure Connect Forums Blog Facebook LinkedIn Stack Overflow Twitter Visual Studio Events YouTube Developer Resources Code samples Documentation Downloads Products & extensions for Visual Studio REST APIs Testing tools for we
the ways of COM and, when trying to recode a code example found in Automating Office by Lori Turner from just a demo of Word interaction into a c++ class (which i will be using in my program) i come across these linker errors: 1>Linking... 1>bridge.obj : error LNK2028: unresolved token (0A00000E) "extern "C" void __stdcall CoUninitialize(void)" (?CoUninitialize@@$$J10YGXXZ) referenced in function "public: __thiscall bridge::~bridge(void)" (??1bridge@@$$FQAE@XZ) 1>bridge.obj : error LNK2028: unresolved token (0A000010) "extern "C" void __stdcall SysFreeString(wchar_t *)" (?SysFreeString@@$$J14YGXPA_W@Z) referenced in function "public: void __thiscall bridge::FindReplace(wchar_t *,wchar_t *)" (?FindReplace@bridge@@$$FQAEXPA_W0@Z) 1>bridge.obj : error LNK2028: unresolved token (0A000011) "extern "C" wchar_t * __stdcall SysAllocString(wchar_t const *)" (?SysAllocString@@$$J14YGPA_WPB_W@Z) referenced in function "public: __thiscall bridge::bridge(void)" (??0bridge@@$$FQAE@XZ) 1>bridge.obj : error LNK2028: unresolved token (0A000018) "extern "C" long __stdcall CoCreateInstance(struct _GUID const &,struct IUnknown *,unsigned long,struct _GUID const &,void * *)" (?CoCreateInstance@@$$J220YGJABU_GUID@@PAUIUnknown@@K0PAPAX@Z) referenced in function "public: __thiscall bridge::bridge(void)" (??0bridge@@$$FQAE@XZ) 1>bridge.obj : error LNK2028: unresolved token (0A000019) "extern "C" long __stdcall CLSIDFromProgID(wchar_t const *,struct _GUID *)" (?CLSIDFromProgID@@$$J18YGJPB_WPAU_GUID@@@Z) referenced in function "public: __thiscall bridge::bridge(void)" (??0bridge@@$$FQAE@XZ) 1>bridge.obj : error LNK2028: unresolved token (0A00001A) "extern "C" long __stdcall CoInitialize(void *)" (?CoInitialize@@$$J14YGJPAX@Z) referenced in function "public: __thiscall bridge::bridge(void)" (??0bridge@@$$FQAE@XZ) 1>bridge.obj : error LNK2019: unresolved external symbol "extern "C" wchar_t * __stdcall SysAllocString(wchar_t const *)" (?SysAllocString@@$$J14YGPA_WPB_W@Z) referenced in function "public: __thiscall bridge::bridge(void)" (??0bridge@@$$FQAE@XZ) 1>bridge.obj : error LNK2019: unresolved external symbol "extern "C" long __stdcall CoCreateInstance(struct _GUID const &,struct IUnknown *,unsigned long,struct _GUID const &,void * *)" (?CoCreateInstance@@$$J220YGJABU_GUID@@PAUIUnknown@@K0PAPAX@Z) referenced in function "public: __thiscall bridge::bridge(void)" (??0bridge@@$$FQAE@XZ) 1>bridge.obj : error LNK2019: unresolved external symbol "exte