C++ unresolved external symbol LNK2019 and LNK2001

Question

I am implementing the shadow system found here, I have made all the changes in clientshadowmgr.cpp, and added worldlight.cpp/.h to game/client.

When I build the solution, I get these errors:

1>clientshadowmgr.obj : error LNK2019: unresolved external symbol "public: bool __thiscall CWorldLights::GetBrightestLightSource(class Vector const &,class Vector &,class Vector &)" (?GetBrightestLightSource@CWorldLights@@QAE_NABVVector@@AAV2@1@Z) referenced in function "private: void __thiscall CClientShadowMgr::UpdateShadowDirectionFromLocalLightSource(unsigned short)" (?UpdateShadowDirectionFromLocalLightSource@CClientShadowMgr@@AAEXG@Z)
1>clientshadowmgr.obj : error LNK2001: unresolved external symbol "class CWorldLights * g_pWorldLights" (?g_pWorldLights@@3PAVCWorldLights@@A)
1>.\Release_mod_hl2\\client.dll : fatal error LNK1120: 2 unresolved externals

In worldlight.h:

//-----------------------------------------------------------------------------
// Singleton exposure
//-----------------------------------------------------------------------------
extern CWorldLights *g_pWorldLights;

Not sure how to fix this, if anyone has any help, I would appreciate it!

Please post [MCVE](http://stackoverflow.com/help/mcve) code only. — Ankur, Jan 09 '15 at 05:50

score 0 · Answer 1 · answered Jan 09 '15 at 05:51

1) the files need to first be added as a separate project - a static library.

2) go to your

project->rightclick->properties->Configuration Properties->Linker->Additional dependencies

here add your lib file generated along with the path.

What you are seeing above is called name mangling

C++ unresolved external symbol LNK2019 and LNK2001

1 Answers1