Error Lnk2019 Static Library
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Error Lnk2019 Unresolved External Symbol C++
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Error Lnk2019 Unresolved External Symbol Visual Studio 2010
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Error Lnk2019 Unresolved External Symbol __declspec(dllimport)
minute: Sign up Unable to link my own static libraries up vote 1 down vote favorite I am trying to add a sound library to a GLFW / OpenGL project in windows. I have set the sound project to output a static library (.lib). It compiles fine. In my main project, I add a reference to Sound and a dependency on Sound error lnk2019 unresolved external symbol _main referenced in function ___tmaincrtstartup (to change the build order). I include "..\Sound\sound.h" in my main.cpp and Intellisense is happy with everything. All compiles well. However, the linker is pissed: 1>Link: 1> LINK : ###\Projects\DeathRace\Debug\DeathRace.exe not found or not built by the last incremental link; performing full link 1>Sound.lib(sound.obj) : error LNK2038: mismatch detected for '_ITERATOR_DEBUG_LEVEL': value '2' doesn't match value '0' in base_objects.obj 1>LINK : warning LNK4098: defaultlib 'MSVCRTD' conflicts with use of other libs; use /NODEFAULTLIB:library 1>Sound.lib(sound.obj) : error LNK2019: unresolved external symbol __imp__alListenerfv referenced in function "public: bool __thiscall SoundAPI::Startup(void)" (?Startup@SoundAPI@@QAE_NXZ) 1>Sound.lib(sound.obj) : error LNK2019: unresolved external symbol __imp__alListener3f referenced in function "public: bool __thiscall SoundAPI::Startup(void)" (?Startup@SoundAPI@@QAE_NXZ) 1>Sound.lib(sound.obj) : error LNK2019: unresolved external symbol __imp__alGetError referenced in function "public: bool __thiscall SoundAPI::Startup(void)" (?Startup@SoundAPI@@QAE_NXZ) 1>Sound.lib(sound.obj) : error LNK2019: unresolved external symbol __imp__alutGetError referenced in function "public: bool __thiscall SoundAPI::Startup(void)" (?Startup@SoundAPI@@QAE_NXZ) 1>Sound.lib(sound.obj) : error LNK2019: unresolved external symbol __imp__alutInit referenced in function "public: bool __thiscall SoundAPI::Startup(void)" (?Startup@SoundAPI@@QAE_NXZ) 1>Sound.lib(sound.obj) : error LNK2019: unresolved external symbol __imp__alutExit referenced in function "public: bool __thiscall SoundAPI::Shutdown(void)" (?Shutdown@SoundAPI@@QAE_NXZ) 1>Sound.lib(sound.obj) : error LNK2019: unresolved external symbol __imp__alDeleteBuffers referenced in function "public: bool __thiscall Sound
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of error lnk2019 unresolved external symbol fortran this site About Us Learn more about Stack Overflow the company Business error lnk2019 unresolved external symbol public __thiscall referenced in function _main Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask error lnk2019 unresolved external symbol void __cdecl Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign http://stackoverflow.com/questions/9044221/unable-to-link-my-own-static-libraries up Unresolved externals with static library in Visual Studio (f2c) up vote 1 down vote favorite I've used f2c.exe successfully in converting some Fortran *.f files into *.c files. I made sure that #include "f2c.h" exists in each C file, and I added the directory containing that header file in MS VS2008: Properties -> C/C++ -> General -> Additional Include Directories The issue http://stackoverflow.com/questions/24700505/unresolved-externals-with-static-library-in-visual-studio-f2c starts with unresolved external symbol errors reported for all the f2c IO and math functions that were present in the source files: s_rsue, e_rsue, s_rsfe, do_uio, f_close, do_fio, do_lio, f_open, s_stop, pow, pow_ri, sqrt, log, exp, tanh, cos, acos, etc. I read here that I have to generate the static library file vcf2c.lib first by downloading libf2c. So I used nmake in VS2008 to run the makefile.vc and produced vcf2c.lib, which I then copied into my project directory and added it under Configuration Properties -> Linker -> Input -> Additional Dependencies, but I'm STILL getting the same unresolved external symbols as before. Have I built this library correctly so that Visual Studio will recognize the functions in it? What am I missing here? Adding this library seemed to have zero effect. Thanks for any help. Examples of errors: error LNK2019: unresolved external symbol "long __cdecl e_rsue(void)" (?e_rsue@@YAJXZ) referenced in function _main error LNK2019: unresolved external symbol "long __cdecl do_uio(long *,char *,long)" (?do_uio@@YAJPAJPADJ@Z) referenced in function _main error LNK2019: unresolved external symbol "long __cdecl s_rsue(struct cilist *)" (?s_rsue@@YAJPAUcilist@@@Z) referenced in function _main error LNK2019: unresolved external sy
Studio Languages , Windows Desktop Development > Visual C++ Question 0 Sign in to vote Hi all, I'm trying to build the UMFpack which is asolver for linear algebraic equations. The codes are provided in *.c extension. In https://social.msdn.microsoft.com/Forums/vstudio/en-US/c7f4a6b5-3291-4c90-a87d-0937cf501072/static-library-linker-error-unresolved-external-symbol?forum=vcgeneral order to create the static library for a forementioned package, I applied the usual prcocedure http://www.cplusplus.com/forum/general/45384/ of creating the static libraries. Nothing went wrong compiled and *.lib file is been created succesfully. But when I try to use that library in different solution after specifying everything properly (include files, directories, additional dependencies etc..). When it comes to linker phase, error logshows that message. Error 1 error LNK2019: unresolved external symbol "void __cdecl umfpack_tic(double * const)" (?umfpack_tic@@YAXQAN@Z) referenced error lnk2019 in function _wmain TRashPrj.obj TRashPrj If I add the different libraries, my own created for testing purposes,solution works flawlessly. Why still the linker complains about that, while the library compiled without error having C and C++ code minlged together ? Regards, Wednesday, December 28, 2011 10:17 AM Reply | Quote Answers 0 Sign in to vote I'm trying to build the UMFpack which is asolver for linear algebraic equations. The codes are provided in *.c extension. error lnk2019 unresolved ... When it comes to linker phase, error logshows that message. Error 1 error LNK2019: unresolved external symbol "void __cdecl umfpack_tic(double * const)" (?umfpack_tic@@YAXQAN@Z) referenced in function _wmain TRashPrj.obj TRashPrj Where you #include the header for the 'C' source code in your C++ source code, try adding: extern "C" { #include your_c_header.h } Dave Proposed as answer by Jesse JiangModerator Friday, December 30, 2011 2:58 AM Marked as answer by Jesse JiangModerator Wednesday, January 04, 2012 7:49 AM Wednesday, December 28, 2011 11:31 AM Reply | Quote 0 Sign in to vote Il 28/12/2011 12:31, David Lowndes [MVP] ha scritto: I'm trying to build the UMFpack which is a solver for linear algebraic equations. The codes are provided in *.c extension. ... When it comes to linker phase, error log shows that message. Error 1 error LNK2019: unresolved external symbol "void __cdecl umfpack_tic(double * const)" (?umfpack_tic@@YAXQAN@Z) referenced in function _wmain TRashPrj.obj TRashPrj Where you #include the header for the 'C' source code in your C++ source code, try adding: extern "C" { #include your_c_header.h } I'd prefer moving the bargain of extern "C" from the client code to the library code, i.e. I'd suggest adding a C++ guard in the library header files: [MyLib.h] #ifdef __cplusplus extern "C" { #endif ... #ifdef __cplusplus } #endif So, the same header can be used
up. I have a Static Lib, lets call it A. So in a file that is compiled into A there is a #include"B.h" in B.h there are a whole bunch of functions externed. They are coded in C which the rest of my code i C++. So I use the standard: 1
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#if defined(__cplusplus) extern "C" { #endif extern int A(); #if defined(__cplusplus) } #endif Anyway, so my static Lib A compiles fine and all is well. The problem comes along when my DLL, called C, tries to use the static lib A. I have tried to add a #include"B.h" inside of DLL C to try and give it a reference to the linker error continue. I have added A to C's property->Linker->input. The error I am getting looks like this: Error 19 error LNK2019: unresolved external symbol _WriteScanline referenced in function "public: virtual int __thiscall Composer::AddImage(int,struct ImageDescription *,class CDataSource *,struct Position const *,char const *)" (?AddImage@Composer@@UAEHHPAUImageDescription@@PAVCDataSource@@PBUPosition@@PBD@Z) A.lib So Composer::AddImage is from the static library A. And the "unresolved external symbol _WriteScanline" is a function externed from the file B.h. So the problem seems to be that my DLL C does not have a reference to the the externed functions. Any help would be welcome. - Mastion Jun 23, 2011 at 11:45pm UTC helios (13227) ?AddImage@Composer@@UAEHHPAUImageDescription@@PAVCDataSource@@PBUPosition@@PBD@ZThis part means that the linker expects AddImage() to be mangled, which, if A.lib is written in the C language, should not be possible. Are you sure you're properly using extern "C"? Jun 23, 2011 at 11:56pm UTC Mastion (7) A.lib is written in C++. The only thing that is written is C is B.h (sorry if I did not explain that very well in previous post), which externs a bunch of functions, like the function "_WriteScanline". I believe I am extern "C'-ing properly. The code snippet from above is how I was externing