[SOLVED] Unresolved external symbols

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Hello... I am trying to compile project that I found on the internet, but getting two unresolved external symbols... Project I am trying to compile was built with Qt4 and I am using Qt5...

I believe errors are appearing because of PacketReceive in header...
@public:

//Constructor
phHandShake();

//Destructor
~phHandShake();

//HandShake packets
int PacketReceive(void* data);
int PacketReceive(void* data, LPBYTE outdata, DWORD* outDataSize);
int PacketReceive(void* data, SOCKET s);
@

Errors:
phHandShake.obj:-1: error: LNK2019: unresolved external symbol _send@16 referenced in function "public: int __thiscall phHandShake::PacketReceive(void *,unsigned int)" (?PacketReceive@phHandShake@@QAEHPAXI@Z)

phHandShake.obj:-1: error: LNK2019: unresolved external symbol __imp__CoCreateGuid@4 referenced in function "public: int __thiscall phHandShake::PacketReceive(void *)" (?PacketReceive@phHandShake@@QAEHPAX@Z)

SGaist

Hi,

It's rather that one or more of these functions are calling windows specific API(s) and you don't link to the corresponding library. In this case Ole32.lib

MohammadReza

Hi.
I think Sometimes this this error occurs when there is different between signature & definition or you use the functions of class wrongly(bad parameter and so on)

Hope to solve.
Ya Ali.

IamSumit

Have you defined all the member functions of the class that you have declared? This problem encounters when you don't define the functions in .cpp class.

Hope it helps.

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Hello... I added lib to .pro file, ran qmake, clean project, rebuild project...

LIBS += -L"C:/Users/Admin/Desktop/" -lOle32

Second error has gone, but the first one is still there...

phHandShake.obj:-1: error: LNK2019: unresolved external symbol _send@16 referenced in function "public: int __thiscall phHandShake::PacketReceive(void *,unsigned int)" (?PacketReceive@phHandShake@@QAEHPAXI@Z)

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Solved... Had to add one more lib - ws2_32.lib