error: undefined reference to `__imp_WSAStartup'
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i am not sure why this doesn't quite work in qt, i am trying to use the windows sdk
and for some reason i get this error#include <sstream>
#include <filesystem>#ifdef _WIN32
#include "winsock2.h"
#include <windows.h>
#endif#include <QScrollBar>
#include <QSettings>
#include "mainwindow.h"
#include "ui_mainwindow.h"//there's a bunch of other includes that don't matter for this i think btw
#include "ws2tcpip.h" #include "stdio.h" using namespace std; using namespace stn; #pragma comment(lib, "Ws2_32.lib") MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent) , ui(new Ui::MainWindow) , dev(this) { ui->setupUi(this); setFixedSize(size()); // prevent resizing setControlsState(); ui->pushButtonSave->setEnabled(false); timerId = startTimer(1000); // Asynchronous initialization. Continued asynchronously in MainWindow::event, then in asyncInit. // QEvent must be allocated on the heap, released by receiver. QCoreApplication::postEvent( this, // receiver new QEvent(QEvent::User));} MainWindow::~MainWindow() { delete ui; killTimer(timerId);} const ApplicationSettings* MainWindow::getSettings() const { return &settings; }// Asynchronous initialization.
// Constructor - event - asyncInit.
void MainWindow::asyncInit()
{
#ifdef _WIN32
// Windows: Program working with SIXTeen SDK is responsible to initialize Windows sockets.WSADATA wsa_data; if (WSAStartup(MAKEWORD(2, 2), &wsa_data) != 0) { postLogString("WSAStartup failed"); ui->pushButtonConnect->setEnabled(false); }#endif
//thank you in advance
@wwwsharq for this error there are so many resone and i personally faced many problems
You should try to rearrange your header files.Try the following way which is i used.
#define WIN32_LEAN_AND_MEAN #include <windows.h> #include <WinSock2.h> #include <WS2tcpip.h> #include <NetCon.h> #pragma comment (lib, "Ws2_32.lib") #pragma comment (lib, "Mswsock.lib") #pragma comment (lib, "AdvApi32.lib") -
@wwwsharq for this error there are so many resone and i personally faced many problems
You should try to rearrange your header files.Try the following way which is i used.
#define WIN32_LEAN_AND_MEAN #include <windows.h> #include <WinSock2.h> #include <WS2tcpip.h> #include <NetCon.h> #pragma comment (lib, "Ws2_32.lib") #pragma comment (lib, "Mswsock.lib") #pragma comment (lib, "AdvApi32.lib")@Ketan__Patel__0011
Have you verified these#pragma comment (lib, ...statements work from MinGW? They are not just an MSVC thing?Maybe your re-ordering of the headers will help, I don't know, but I don't see how this will solve MinGW not knowing to link with Ws2_32, which seems to be the error message.
Same sort of thing as @SamiV123 above. Don't forget the OP actually already has
#pragma comment(lib, "Ws2_32.lib")in his original code question, and it's still not linking....
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@Ketan__Patel__0011
Have you verified these#pragma comment (lib, ...statements work from MinGW? They are not just an MSVC thing?Maybe your re-ordering of the headers will help, I don't know, but I don't see how this will solve MinGW not knowing to link with Ws2_32, which seems to be the error message.
Same sort of thing as @SamiV123 above. Don't forget the OP actually already has
#pragma comment(lib, "Ws2_32.lib")in his original code question, and it's still not linking....
@JonB said in error: undefined reference to `__imp_WSAStartup':
They are not just an MSVC thing
The pragma is proprietary MSVC crap
Qt Online Installer direct download: https://download.qt.io/official_releases/online_installers/
Visit the Qt Academy at https://academy.qt.io/catalog -
@JonB said in error: undefined reference to `__imp_WSAStartup':
They are not just an MSVC thing
The pragma is proprietary MSVC crap
@Christian-Ehrlicher I know. I was inviting @Ketan__Patel__0011 to consider his answer for the OP with MinGW in this light.
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@Christian-Ehrlicher I know. I was inviting @Ketan__Patel__0011 to consider his answer for the OP with MinGW in this light.
@JonB Well i am using this conecpt in MSVC based Application and i also tried with MinGW Application and it's working very well.
But For MinGW you have to do one more thing.
just add below code in your .pro fileLIBS += -lWs2_32 LIBS += -lMswsock LIBS += -lAdvApi32 -
@JonB Well i am using this conecpt in MSVC based Application and i also tried with MinGW Application and it's working very well.
But For MinGW you have to do one more thing.
just add below code in your .pro fileLIBS += -lWs2_32 LIBS += -lMswsock LIBS += -lAdvApi32@Ketan__Patel__0011
So for MinGW the#pragma comment (lib, "Ws2_32.lib")has no effect, that is why you have to add the-lWs2_32etc. explicitly to get the link to happen. Which is just what we said --- the#pragmais for MSVC only.If you read what the OP is asking you will see that are using cmake, not qmake, no
.profile. So yourLIBSlines do not help them. And they are asking precisely what equivalent they have to do for cmake (which I do not know). -
@Ketan__Patel__0011
So for MinGW the#pragma comment (lib, "Ws2_32.lib")has no effect, that is why you have to add the-lWs2_32etc. explicitly to get the link to happen. Which is just what we said --- the#pragmais for MSVC only.If you read what the OP is asking you will see that are using cmake, not qmake, no
.profile. So yourLIBSlines do not help them. And they are asking precisely what equivalent they have to do for cmake (which I do not know). -
@JonB
So For CMake You can try the below code.target_link_libraries(${CMAKE_PROJECT_NAME} Ws2_32) target_link_libraries(${CMAKE_PROJECT_NAME} Mswsock) target_link_libraries(${CMAKE_PROJECT_NAME} AdvApi32)@Ketan__Patel__0011 What are you discussing here? The op already used this three days ago...
target_link_libraries(eccoci PRIVATE ws2_32)
