CODEWITHSUNDEEP
cwinsockundefined-referenceunresolved-external
dsynkd
dsynkd

Reputation: 2145

Undefined Reference / Unresolved External Symbol

I'm trying to use WinSock.h header file, but I get either one of the errors below: in VS2010 (C++): 

Unresolved External Symbol to [the function included in winsock.g, e.g socket()]

in gcc command line (C):

Undefined Reference to [the function included in winsock.g, e.g socket()]

code is simple: Just including the Winsock.h header file and then 

SOCKET s =  socket (AF_INET, SOCK_STREAM, IPPROTO_TCP);

I get an error on socket() & closesocket() functions...! I searched in Stackoverflow and found several topics over this, but they all suggested a change in the header file. I can't change WinSock.h here, so I need a solution in the actual code that uses the header file. Any ideas?

Upvotes: 0

Views: 1574

Answers (2)

MRAB
MRAB

Reputation: 20654

According to the documentation, you need ws2_32.lib.

Go to Project->Properties->Linker->Additional dependencies and add ws2_32.lib.

EDIT:

That should be Project->Properties->Linker->Input->Additional Dependencies

Upvotes: 5

Carl Norum
Carl Norum

Reputation: 224924

Those are linker errors, not compiler errors. You need to link the WinSock library. For gcc, that means adding the library to your link command line:

gcc -Lpath/to/winsock/library -o myApplication myObject.o wsock32.lib

I don't know anything about Visual Studio, I'm afraid, but this link might help.

Upvotes: 0

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