Error Lnk2019 Extern C
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Error Lnk2019 Unresolved External Symbol Winmain@16 Referenced In Function ___tmaincrtstartup
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Error Lnk2019 Unresolved External Symbol __declspec(dllimport)
just like you, helping each other. Join them; it only takes a minute: Sign up error : LNK2019: unresolved external symbol “extern ”C" up vote 0 down vote favorite What's wrong with this unresolved externals? I'm trying to implement this into InitInstance of my MFC application. But I'm getting this line error from the debugger. LNK2019: error lnk2019 unresolved external symbol _main referenced in function ___tmaincrtstartup unresolved external symbol "extern "C" int __stdcall EnumProcesses(unsigned long *,unsigned long,unsigned long *)" (?EnumProcesses@@$$J212YGHPAKK0@Z) referenced in function "public: virtual int __thiscall COkApp::InitInstance(void)" (?InitInstance@COpenEyeProcessApp@@$$FUAEHXZ) Here is the OkApp files : OkApp.h //... #include
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Error Lnk2019 Unresolved External Symbol Fortran
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Error Lnk2019 Unresolved External Symbol Public __thiscall Referenced In Function _main
x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join error lnk2019 unresolved external symbol void __cdecl them; it 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 http://stackoverflow.com/questions/22014262/error-lnk2019-unresolved-external-symbol-extern-c function, foo() 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 http://stackoverflow.com/questions/27558704/error-lnk2019-caused-by-an-extern-c-function-referencing-another to build, though, 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 quest
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Forum Visual C++ & C++ Programming Visual C++ Programming unresolved external symbol "int __cdecl _.." between C and Cpp file If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register or Login before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. Results 1 to 5 of 5 Thread: unresolved external symbol "int __cdecl _.." between C and Cpp file Tweet Thread Tools Show Printable Version Email this Page… Subscribe to this Thread… Display Linear Mode Switch to Hybrid Mode Switch to Threaded Mode April 20th, 2010,05:41 AM #1 leKoxn View Profile View Forum Posts Junior Member Join Date Aug 2009 Posts 23 [SOLVED] unresolved external symbol "int __cdecl _.." between C and Cpp file Hi all, I am receiving a "error LNK2019: unresolved external symbol "int __cdecl _function(...)" error while trying to compile the following files: main.cpp -------------------------------------------- #include "function.h" int main() { function(0, 0); return 0; } --------------------------------------------- function.h -------------------------------------------- #ifndef FNC_H #define FNC_H extern void function(int a, int b); #endif --------------------------------------------- function.c -------------------------------------------- #include "function.h" void function(int a, int b); { // do something here } --------------------------------------------- Seems like the program cannot find the function's definition. Why is that? Am I missing something with the association .h -> .c ? Please give me suggestions Last edited by leKoxn; April 20th, 2010 at 02:20 PM. Reason: problem solved Reply With Quote April 20th, 2010,05:50 AM #2 PredicateNormative View Profile View Forum Posts Senior Mem