I get these errors when i try to put together a GLSL example program from a website, just so i can get a feel for shaders. I also get these exact same errors when i try to implement this shader in my own program.
http://www.swiftless.com/tutorials/glsl/1_setup.html#DL
>------ Build started: Project: TheLightingExperiment2, Configuration: Debug Win32 ------
1> main.cpp
1>main.obj : error LNK2019: unresolved external symbol "public: void __thiscall Shader::init(char const *,char const *)" (?init#Shader##QAEXPBD0#Z) referenced in function "void __cdecl init(void)" (?init##YAXXZ)
1>main.obj : error LNK2019: unresolved external symbol "public: void __thiscall Shader::unbind(void)" (?unbind#Shader##QAEXXZ) referenced in function "void __cdecl display(void)" (?display##YAXXZ)
1>main.obj : error LNK2019: unresolved external symbol "public: void __thiscall Shader::bind(void)" (?bind#Shader##QAEXXZ) referenced in function "void __cdecl display(void)" (?display##YAXXZ)
1>main.obj : error LNK2019: unresolved external symbol "public: __thiscall Shader::Shader(void)" (??0Shader##QAE#XZ) referenced in function "void __cdecl `dynamic initializer for 'shader''(void)" (??__Eshader##YAXXZ)
1>main.obj : error LNK2019: unresolved external symbol "public: __thiscall Shader::~Shader(void)" (??1Shader##QAE#XZ) referenced in function "void __cdecl `dynamic atexit destructor for 'shader''(void)" (??__Fshader##YAXXZ)
1>C:\Users\Shawn\Desktop\TheLightingExperiment2\Debug\TheLightingExperiment2.exe : fatal error LNK1120: 5 unresolved externals
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========
These are undefined reference errors. from the Linker.You didn't attach the libraries. as you are in Visual Studio you can do this by right clicking on your Solution and thenby going to Properties.
It looks like you are missing libraries. Look into GLEW the GL Extension Wrangler and link that into your project. It is especially helpful with making shader extensions work.
GLEW Page
Related
I am a newbie to C++. I want to use, lacewing-project.org in my C++ project. I read the documentation on how to build it and successfully did it using both DLL - Release and Static Library - Release configurations.
Now I don't know how to use this in my project and how to setup and configure my project? I was following this tutorial, but was stuck in the middle because of missing options in the latest Visual Studio. I use Visual C++ Expression Ed., 2012 on Windows 8
I googled and did the following:
Added the lib file and the lacewing.h file in my project.
Under Visual C++ Project Properties, in the Linker folder -> Input I added the lib file as Additional Dependencies.
I placed the dll in Windows\System32 folder. Will I need to do anything with the dll other than placing it in win32 folder?
My code is from the hello world example given in the documentation.
When I try to compile I get:
1>------ Build started: Project: test, Configuration: Debug Win32 ------
1> Source.cpp
1>Source.obj : error LNK2019: unresolved external symbol __imp__lw_version referenced in function "void __cdecl on_get(struct lacewing::_webserver *,struct lacewing::_webserver_request *)" (?on_get##YAXPAU_webserver#lacewing##PAU_webserver_request#2##Z)
1>Source.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) void __cdecl lacewing::pump_delete(struct lacewing::_pump *)" (__imp_?pump_delete#lacewing##YAXPAU_pump#1##Z) referenced in function _main
1>Source.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: struct lacewing::_error * __thiscall lacewing::_eventpump::start_eventloop(void)" (__imp_?start_eventloop#_eventpump#lacewing##QAEPAU_error#2#XZ) referenced in function _main
1>Source.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) struct lacewing::_eventpump * __cdecl lacewing::eventpump_new(void)" (__imp_?eventpump_new#lacewing##YAPAU_eventpump#1#XZ) referenced in function _main
1>Source.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: void __cdecl lacewing::_stream::writef(char const *,...)" (__imp_?writef#_stream#lacewing##QAAXPBDZZ) referenced in function "void __cdecl on_get(struct lacewing::_webserver *,struct lacewing::_webserver_request *)" (?on_get##YAXPAU_webserver#lacewing##PAU_webserver_request#2##Z)
1>Source.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: void __thiscall lacewing::_webserver::host(long)" (__imp_?host#_webserver#lacewing##QAEXJ#Z) referenced in function _main
1>Source.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: void __thiscall lacewing::_webserver::on_get(void (__cdecl*)(struct lacewing::_webserver *,struct lacewing::_webserver_request *))" (__imp_?on_get#_webserver#lacewing##QAEXP6AXPAU12#PAU_webserver_request#2##Z#Z) referenced in function _main
1>Source.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) struct lacewing::_webserver * __cdecl lacewing::webserver_new(struct lacewing::_pump *)" (__imp_?webserver_new#lacewing##YAPAU_webserver#1#PAU_pump#1##Z) referenced in function _main
1>Source.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) void __cdecl lacewing::webserver_delete(struct lacewing::_webserver *)" (__imp_?webserver_delete#lacewing##YAXPAU_webserver#1##Z) referenced in function _main
1>C:\Users\Jayarathina\Desktop\New folder (3)\test\Debug\test.exe : fatal error LNK1120: 9 unresolved externals
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========
Please help...
To link statically with the library, one must define lw_import. If you don't do this, it will default to __declspec(dllimport):
#ifndef lw_import
#define lw_import __declspec (dllimport)
#endif
which causes the linker to try and pull the functions in from a DLL (which is wrong when statically linking). To do this, you can either add lw_import= to your preprocessor definitions in the project properties, or #define it before including lacewing.h, as so:
#define lw_import
#include <lacewing.h>
As you're statically linking the library, you will also need to link any library dependencies into your own project. You can find the list in the project properties of liblacewing.vcproj itself, but as of 0.5.1 these are ws2_32.lib, mswsock.lib, mpr.lib, secur32.lib and crypt32.lib.
I have a project that used to compile just fine, using the freetype library.
Since then my OS has been reinstalled and therefore so has Visual Studio 2010.
I have re-included and reinstalled all of the .lib .dll and header files. For some reason now if I run the program with the release configuration it runs just fine. But if I switch over to the debug config, it gives me unresolved external symbol errors from the linker, on the freetype library functions.
Now I'm sure my C++ directories for both configurations are identical as I re-set them using the all-configurations tab in the solution settings. As well as this, so are both configurations "additional directories/additional dependancies settings", set identically in the same way.
The only difference I could find between the release and debug folders in the project folder, is the presence of a file in the debug folder called "vc100.idb", which is a minimum rebuild dependancy file. This looked promising, but removing it yielded no results, so I put it back.
Do you have any ideas of what could be causing this difference between the configurations compiling?
Worst come to worst, I can continue programming on the release config, but I'd rather not continue down this road as I'd really like to know the root of this problem.
Thanks in advance,
Guy
The errors:
1>freetype.obj : error LNK2019: unresolved external symbol _FT_Glyph_To_Bitmap referenced in function "void __cdecl freetype::make_dlist(struct FT_FaceRec_ *,char,unsigned int,unsigned int *)" (?make_dlist#freetype##YAXPAUFT_FaceRec_##DIPAI#Z)
1>freetype.obj : error LNK2019: unresolved external symbol _FT_Get_Glyph referenced in function "void __cdecl freetype::make_dlist(struct FT_FaceRec_ *,char,unsigned int,unsigned int *)" (?make_dlist#freetype##YAXPAUFT_FaceRec_##DIPAI#Z)
1>freetype.obj : error LNK2019: unresolved external symbol _FT_Load_Glyph referenced in function "void __cdecl freetype::make_dlist(struct FT_FaceRec_ *,char,unsigned int,unsigned int *)" (?make_dlist#freetype##YAXPAUFT_FaceRec_##DIPAI#Z)
1>freetype.obj : error LNK2019: unresolved external symbol _FT_Get_Char_Index referenced in function "void __cdecl freetype::make_dlist(struct FT_FaceRec_ *,char,unsigned int,unsigned int *)" (?make_dlist#freetype##YAXPAUFT_FaceRec_##DIPAI#Z)
1>freetype.obj : error LNK2019: unresolved external symbol _FT_Done_FreeType referenced in function "public: void __thiscall freetype::font_data::init(char const *,unsigned int)" (?init#font_data#freetype##QAEXPBDI#Z)
1>freetype.obj : error LNK2019: unresolved external symbol _FT_Done_Face referenced in function "public: void __thiscall freetype::font_data::init(char const *,unsigned int)" (?init#font_data#freetype##QAEXPBDI#Z)
1>freetype.obj : error LNK2019: unresolved external symbol _FT_Set_Char_Size referenced in function "public: void __thiscall freetype::font_data::init(char const *,unsigned int)" (?init#font_data#freetype##QAEXPBDI#Z)
1>freetype.obj : error LNK2019: unresolved external symbol _FT_New_Face referenced in function "public: void __thiscall freetype::font_data::init(char const *,unsigned int)" (?init#font_data#freetype##QAEXPBDI#Z)
1>freetype.obj : error LNK2019: unresolved external symbol _FT_Init_FreeType referenced in function "public: void __thiscall freetype::font_data::init(char const *,unsigned int)" (?init#font_data#freetype##QAEXPBDI#Z)
Edit: OK well this is strange. I've removed ALL of the freetype directory information rom the include and library directory setting in the release config, as well as the additional dependancies. And the released config version still works!
This is leading me to believe there is something missing (vs config-wise) from moving my files over.
I had the same problem.
I solved it by compiling the freetype( freetype-2.5.2\builds\windows\vc2010\freetype.sln ) solution for the x64 platform (or win32 if you use it).
You will get the .libs for this platform.
This question already has answers here:
Linker error LNK2019 from 3rd party library
(3 answers)
Closed 10 years ago.
I tried to see what is the problem(s) related to those error messages. I tried to check everything but still, I'm not finding the source of the error.
According to you, the obj error followed by error LNK2019: unresolved external symbol imp__is_CaptureVideo referenced in function, what is its provenance?
I'm using Visual Express C++ 2010.
Thank you.
1>IdsSimpleLiveDlg.obj : error LNK2019: unresolved external symbol __imp__is_CaptureVideo referenced in function "private: void __thiscall CIdsSimpleLiveDlg::OnButtonStart(void)" (?OnButtonStart#CIdsSimpleLiveDlg##AAEXXZ)
1>IdsSimpleLiveDlg.obj : error LNK2019: unresolved external symbol __imp__is_StopLiveVideo referenced in function "private: void __thiscall CIdsSimpleLiveDlg::OnButtonStop(void)" (?OnButtonStop#CIdsSimpleLiveDlg##AAEXXZ)
1>IdsSimpleLiveDlg.obj : error LNK2019: unresolved external symbol __imp__is_SetImageMem referenced in function "private: void __thiscall CIdsSimpleLiveDlg::OnBnClickedButtonLoadParameter(void)" (?OnBnClickedButtonLoadParameter#CIdsSimpleLiveDlg##AAEXXZ)
1>IdsSimpleLiveDlg.obj : error LNK2019: unresolved external symbol __imp__is_AllocImageMem referenced in function "private: void __thiscall CIdsSimpleLiveDlg::OnBnClickedButtonLoadParameter(void)" (?OnBnClickedButtonLoadParameter#CIdsSimpleLiveDlg##AAEXXZ)
1>IdsSimpleLiveDlg.obj : error LNK2019: unresolved external symbol __imp__is_SetColorMode referenced in function "private: void __thiscall CIdsSimpleLiveDlg::OnBnClickedButtonLoadParameter(void)" (?OnBnClickedButtonLoadParameter#CIdsSimpleLiveDlg##AAEXXZ)
1>IdsSimpleLiveDlg.obj : error LNK2019: unresolved external symbol __imp__is_AOI referenced in function "private: void __thiscall CIdsSimpleLiveDlg::OnBnClickedButtonLoadParameter(void)" (?OnBnClickedButtonLoadParameter#CIdsSimpleLiveDlg##AAEXXZ)
1>IdsSimpleLiveDlg.obj : error LNK2019: unresolved external symbol __imp__is_FreeImageMem referenced in function "private: void __thiscall CIdsSimpleLiveDlg::OnBnClickedButtonLoadParameter(void)" (?OnBnClickedButtonLoadParameter#CIdsSimpleLiveDlg##AAEXXZ)
1>IdsSimpleLiveDlg.obj : error LNK2019: unresolved external symbol __imp__is_ParameterSet referenced in function "private: void __thiscall CIdsSimpleLiveDlg::OnBnClickedButtonLoadParameter(void)" (?OnBnClickedButtonLoadParameter#CIdsSimpleLiveDlg##AAEXXZ)
1>IdsSimpleLiveDlg.obj : error LNK2019: unresolved external symbol __imp__is_EnableMessage referenced in function "private: bool __thiscall CIdsSimpleLiveDlg::OpenCamera(void)" (?OpenCamera#CIdsSimpleLiveDlg##AAE_NXZ)
1>IdsSimpleLiveDlg.obj : error LNK2019: unresolved external symbol __imp__is_GetSensorInfo referenced in function "private: bool __thiscall CIdsSimpleLiveDlg::OpenCamera(void)" (?OpenCamera#CIdsSimpleLiveDlg##AAE_NXZ)
1>IdsSimpleLiveDlg.obj : error LNK2019: unresolved external symbol __imp__is_RenderBitmap referenced in function "private: long __thiscall CIdsSimpleLiveDlg::OnUEyeMessage(unsigned int,long)" (?OnUEyeMessage#CIdsSimpleLiveDlg##AAEJIJ#Z)
1>IdsSimpleLiveDlg.obj : error LNK2019: unresolved external symbol __imp__is_ExitCamera referenced in function "private: void __thiscall CIdsSimpleLiveDlg::ExitCamera(void)" (?ExitCamera#CIdsSimpleLiveDlg##AAEXXZ)
1>IdsSimpleLiveDlg.obj : error LNK2019: unresolved external symbol __imp__is_GetColorDepth referenced in function "private: int __thiscall CIdsSimpleLiveDlg::InitDisplayMode(void)" (?InitDisplayMode#CIdsSimpleLiveDlg##AAEHXZ)
1>IdsSimpleLiveDlg.obj : error LNK2019: unresolved external symbol __imp__is_SetDisplayMode referenced in function "private: int __thiscall CIdsSimpleLiveDlg::InitDisplayMode(void)" (?InitDisplayMode#CIdsSimpleLiveDlg##AAEHXZ)
1>IdsSimpleLiveDlg.obj : error LNK2019: unresolved external symbol __imp__is_GetDuration referenced in function "private: int __thiscall CIdsSimpleLiveDlg::InitCamera(unsigned long *,struct HWND__ *)" (?InitCamera#CIdsSimpleLiveDlg##AAEHPAKPAUHWND__###Z)
1>IdsSimpleLiveDlg.obj : error LNK2019: unresolved external symbol __imp__is_InitCamera referenced in function "private: int __thiscall CIdsSimpleLiveDlg::InitCamera(unsigned long *,struct HWND__ *)" (?InitCamera#CIdsSimpleLiveDlg##AAEHPAKPAUHWND__###Z)
1>IdsSimpleLiveDlg.obj : error LNK2019: unresolved external symbol __imp__is_ImageFormat referenced in function "private: void __thiscall CIdsSimpleLiveDlg::GetMaxImageSize(int *,int *)" (?GetMaxImageSize#CIdsSimpleLiveDlg##AAEXPAH0#Z)
1>nafxcwd.lib(appcore.obj) : error LNK2001: unresolved external symbol ___argv
1>nafxcwd.lib(appcore.obj) : error LNK2001: unresolved external symbol ___argc
1>C:\Program Files\IDS\uEye\Develop\Source\SimpleLive\Debug\po.exe : fatal error LNK1120: 19 unresolved externals
I have added the correspondent library by clicking on the properties
of my project and then, adding the directory to the Library Directories
It seems like you've added the 'Additional Library Directory' to your VS Project - but didn't link the actual library file (windows extension: .lib). I think what you did is
Project Properties -> Configuration Properties-> Linker -> General -> Additional Library Directories
and added the directoy where your 3rd party '.lib' is inside. But in fact this doesn't link against that '.lib' file by itself (it just added the directory where VS is searching for the linked .lib files).
Try the following:
Right click on your project -> Project Properties -> Configuration Properties-> Linker -> Input -> Additional Dependencies
There is a list like:
'kernel32.lib;user32.lib;...;%(AdditionalDependencies)'
And somewehere inside there should the name of your '.lib file' appear. If it doesn't, you've to add it there. I.e. if the lib of your 3rd party library is named 'myLib.lib' you would insert there instead
'kernel32.lib;user32.lib;...;myLib.lib;%(AdditionalDependencies)'
I am working on a DirectX 11 project for school and I followed the book thoroughly when doing this. I keep thinking that maybe something is labeled wrong but I double checked all my files, all my class names are fine (I believe they are fine) and double checked how all my header files are setup and everything should be okay and I still get this error output:
1>BlankDemo.obj : error LNK2019: unresolved external symbol "public: __thiscall DemoBase::DemoBase(void)" (??0DemoBase##QAE#XZ) referenced in function "public: __thiscall BlankDemo::BlankDemo(void)" (??0BlankDemo##QAE#XZ)
1>BlankDemo.obj : error LNK2019: unresolved external symbol "public: virtual __thiscall DemoBase::~DemoBase(void)" (??1DemoBase##UAE#XZ) referenced in function "public: virtual __thiscall BlankDemo::~BlankDemo(void)" (??1BlankDemo##UAE#XZ)
1>main.obj : error LNK2019: unresolved external symbol "public: void __thiscall DemoBase::Shutdown(void)" (?Shutdown#DemoBase##QAEXXZ) referenced in function _wWinMain#16
1>main.obj : error LNK2019: unresolved external symbol "public: bool __thiscall DemoBase::Initialize(struct HINSTANCE__ *,struct HWND__ *)" (?Initialize#DemoBase##QAE_NPAUHINSTANCE__##PAUHWND__###Z) referenced in function _wWinMain#16
1>C:\Users\vaughn\documents\visual studio 2010\Projects\BlankWindow\Debug\BlankWindow.exe : fatal error LNK1120: 4 unresolved externals
How do I solve this?
Evidently, you either haven't implemented a handful of methods from the DemoBase class (including its constructor and destructor), or you haven't included the implementation file in the list of files to compile or link with your program. Implement them, and then make sure you've included the source file in your project.
I am coming from Xcode, trying to compile a project in Visual Studio 2010, and I get the following errors:
2>ofxCLeye.obj : error LNK2019: unresolved external symbol "struct _GUID __cdecl CLEyeGetCameraUUID(int)" (?CLEyeGetCameraUUID##YA?AU_GUID##H#Z) referenced in function "public: static int __cdecl ofxCLeye::listDevices(void)" (?listDevices#ofxCLeye##SAHXZ)
2>ofxCLeye.obj : error LNK2019: unresolved external symbol "int __cdecl CLEyeGetCameraCount(void)" (?CLEyeGetCameraCount##YAHXZ) referenced in function "public: static int __cdecl ofxCLeye::listDevices(void)" (?listDevices#ofxCLeye##SAHXZ)
2>ofxCLeye.obj : error LNK2019: unresolved external symbol "bool __cdecl CLEyeCameraGetFrameDimensions(void *,int &,int &)" (?CLEyeCameraGetFrameDimensions##YA_NPAXAAH1#Z) referenced in function "public: void __thiscall ofxCLeye::grabFrame(void)" (?grabFrame#ofxCLeye##QAEXXZ)
2>ofxCLeye.obj : error LNK2019: unresolved external symbol "bool __cdecl CLEyeCameraGetFrame(void *,unsigned char *,int)" (?CLEyeCameraGetFrame##YA_NPAXPAEH#Z) referenced in function "public: void __thiscall ofxCLeye::grabFrame(void)" (?grabFrame#ofxCLeye##QAEXXZ)
2>ofxCLeye.obj : error LNK2019: unresolved external symbol "bool __cdecl CLEyeDestroyCamera(void *)" (?CLEyeDestroyCamera##YA_NPAX#Z) referenced in function "public: virtual void __thiscall ofxCLeye::close(void)" (?close#ofxCLeye##UAEXXZ)
2>ofxCLeye.obj : error LNK2019: unresolved external symbol "bool __cdecl CLEyeCameraStop(void *)" (?CLEyeCameraStop##YA_NPAX#Z) referenced in function "public: virtual void __thiscall ofxCLeye::close(void)" (?close#ofxCLeye##UAEXXZ)
... etc etc...
2>bin\clEye_debug.exe : fatal error LNK1120: 10 unresolved externals
I imagine that the compiler is trying to link CLEyeMulticam.lib but not finding it. I think that I have configured it properly.
Could you point me with the needed steps to include a library in VS2010 ?
Thank you,
marc
Apologies if this is overly pedantic. If this is a pre-built library (not built as part of the project/solution) then make sure you
a) #include the correct header
b) #define any requisite macros
c) speciy additional .lib dependencies as shown below.
You will need to specify a fully qualifed path (d:\src\project\libs\camera.lib) unless the libary file is in the LIB environment variable.
In the Property Pages for your project, navigate to Configuration > Linker > Input and add the lib file to the Additional Dependencies setting. This applies to VC++ 2008, probably likewise to 2010.