Error Lnk2019 Unresolved External Symbol Wsacleanup @0
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Error Lnk2019 Unresolved External Symbol Winmain@16 Referenced In Function ___tmaincrtstartup
each other. Join them; it only takes a minute: Sign up WSAStartup link error up vote 1 down vote favorite I am using EVC++ and I want to compile the program which uses the sockets. I've included #include And I have included in project properties a path to Ws2.lib But still get the error at link error lnk2019 unresolved external symbol visual studio 2010 step: error LNK2019: unresolved external symbol WSAStartup referenced in function ... How to resolve this problem? linker evc share|improve this question asked Jul 29 '10 at 3:23 erjik 206721 add a comment| 2 Answers 2 active oldest votes up vote 3 down vote You haven't linked your program with the winsock library. The Winsock 2 library is called ws2_32.lib (static) or ws2_32.dll (dynamic). It should already be on your system; you just need to tell your compiler/linker to link your program against it. The method of doing this varies by compiler, and unfortunately I'm not familiar with EVC++. share|improve this answer answered Jul 29 '10 at 3:52 Tyler McHenry 46.4k788141 msdn.microsoft.com/en-us/library/ms911778.aspx It is written there about how the WSAStartup works. It uses ws2.dll. But nothing is written about ws2_32.dll –erjik Jul 29 '10 at 4:56 add a comment| up vote 3 down vote #pragma comment(lib,"WS2_32") after all #include's share|improve this answer answered Nov 24 '12 at 13:51 Mickey Tin 1,12021944 add a comment| Your Answer draft saved d
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Error Lnk2019 Unresolved External Symbol Public __thiscall Referenced In Function _main
Stack Overflow the company Business Learn more about hiring developers or posting ads with error lnk2019 unresolved external symbol void __cdecl us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is error lnk2019 unresolved external symbol main referenced in function __tmaincrtstartup a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up lnk2019 visual studio error up vote 3 down vote favorite I am trying http://stackoverflow.com/questions/3359283/wsastartup-link-error to make a simple UDP socket class to do some talking between a c++ program and a java program so I'm trying to make a socket class that handles all the UDP transmission but I can't get the program to compile because I get about 8 lnk2019 errors and I have no idea what they even mean. I mainly work in Java and only use c++ when I have to http://stackoverflow.com/questions/15062654/lnk2019-visual-studio-error lol. I have 3 files the socket header and code. Also the Udp Socket code is from rFactor-Nesim so the socket code isn't written by me. UdpSocket.cpp #include "UdpSocket.hpp" #include UdpSocket::UdpSocket(const char* host, int port) : mHost(host), mPort(port) { } UdpSocket::~UdpSocket(void) { } void UdpSocket::Open() { if(WSAStartup(MAKEWORD(2, 0), &mWinsockData) != 0) fprintf(stderr, "WSAStartup() failed"); if ((mSocket = socket(AF_INET, SOCK_DGRAM, 0)) < 0) perror("socket() failed"); memset(&mSocketAddress, 0, sizeof(mSocketAddress)); mSocketAddress.sin_family = AF_INET; mSocketAddress.sin_addr.s_addr = inet_addr(mHost); mSocketAddress.sin_port = htons(mPort); } void UdpSocket::Close() { closesocket(mSocket); WSACleanup(); } void UdpSocket::Send(char* str, size_t length) { size_t result = sendto(mSocket, str, length, 0, (struct sockaddr *) &mSocketAddress, sizeof(mSocketAddress)); if(result != length) perror("sendto() sent incorrect number of bytes"); } UdpSocket.hpp #ifndef UDPSOCKET_HPP #define UDPSOCKET_HPP #include class UdpSocket { public: UdpSocket(const char* host, int port); ~UdpSocket(void); void Send(char* str, size_t length); void Open(); void Close(); private: const char* mHost; int mPort; int mSocket; struct sockaddr_in mSocketAddress; WSADATA mWinsockData; }; #endif // UDPSOCKET_HPP and the main #include "Socket/UdpSocket.hpp" #include int Main(){ UdpSocket* testSocket = new UdpSocket("127.0.0.1", 27469); testSocket->Open(); system("pause"); return 0; } Any help would be great. I'm not very strong with c++ but I have done a little bit Console Ouput: Error 1 error LNK2019: unresolved external symbol __imp__htons@4 referenced in function "public: vo
I'm not asking for anyone to write the whole program ( As I know how annoying http://www.cplusplus.com/forum/windows/39192/ that is ) I just need help with Winsock. I have tried several compilers and always get weird errors. ***** Here is the output from VC++ 2008 Express Edition: ***** 1
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1 1>Compiling... 1>main.cpp 1>Linking... 1>main.obj : error LNK2019: unresolved external symbol __imp__WSACleanup@0 referenced in function _main 1>main.obj : error LNK2019: unresolved external symbol error lnk2019 __imp__WSAStartup@8 referenced in function _main 1>C:\Users\Rory\ProjectX\ProjectX\Debug\ProjectX.exe : fatal error LNK1120: 2 unresolved externals 1>Build log was saved at "file://c:\Users\Rory\ProjectX\ProjectX\ProjectX\Debug\BuildLog.htm" 1>ProjectX - 3 error(s), 0 warning(s) ========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ========== ***** Here is my code: ***** 1
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#include #include #include #include int iReqWinsockVer = 2; error lnk2019 unresolved using namespace std; int main() { cout<<"Initializing Winsock 2...\n"; // WINSOCK INITIALIZATION WSADATA wsaData; if (WSAStartup(MAKEWORD(iReqWinsockVer,0), &wsaData)==0) { // Check if major version is at least iReqWinsockVer if (LOBYTE(wsaData.wVersion) >= iReqWinsockVer) { // Network stuff here } else { // Required version not available } // Cleanup winsock if (WSACleanup()!=0) { // cleanup failed } } else { // startup failed } // END WINSOCK INITIALIZATION system("PAUSE"); } Thanks for any help in advance! Last edited on Mar 23, 2011 at 6:11am UTC Mar 23, 2011 at 6:26am UTC modoran (2060) Add ws2_32.lib as linker input. Mar 23, 2011 at 11:09pm UTC rjalaskan (7) I have looked in project configuration, but I cannot seem to find the proper place. There are a lot of options that reference input. How should I do this? Mar 24, 2011 at 6:08am UTC guestgulkan (2942) Project Properties->linker->input page On that page you will see Additional Dependencies. Put it in there - note that library names shoul