error: undefined reference to `__imp_WSAStartup'

wwwsharq

@Christian-Ehrlicher hello do you have a tutorial or site you would reccomend to learn what you just said that isn't the cmake website? i have not understood evrything there and saying add target_link_libraries call doesn't tell me much i have added that line plenty of times without any luck, just more errors

target_link_libraries(eccoci PRIVATE ws2_32)

and the like i've tried already

Christian Ehrlicher

@wwwsharq said in error: undefined reference to `__imp_WSAStartup':

just more errors

What errors?

wwwsharq

@Christian-Ehrlicher
current cmake

cmake_minimum_required(VERSION 3.5)

project(eccoci VERSION 0.1 LANGUAGES CXX)

set(CMAKE_AUTOUIC ON)
set(CMAKE_AUTOMOC ON)
set(CMAKE_AUTORCC ON)

set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON)


find_package(QT NAMES Qt6 Qt5 REQUIRED COMPONENTS Widgets)
find_package(Qt${QT_VERSION_MAJOR} REQUIRED COMPONENTS Widgets)

set(PROJECT_SOURCES
       main.cpp
       mainwindow.cpp
       mainwindow.h
       mainwindow.ui
       acqparamdialog.cpp
       advancedparamdialog.cpp
       device.cpp
       display.cpp
       settingsdialog.cpp
       utilities.cpp
)

if(${QT_VERSION_MAJOR} GREATER_EQUAL 6)
   qt_add_executable(eccoci
       MANUAL_FINALIZATION
       ${PROJECT_SOURCES}
       main.cpp
       definitions.h
       stn_def.h
       stn_calibration.h
       app_settings.h
       device.h
       stn_device.h
       display.h display.cpp
       display.ui
       settingsdialog.h settingsdialog.cpp
       settingsdialog.ui
       utilities.h utilities.cpp
       auto_fclose.h
       stn_print.h
       custom_events.h
       acqparamdialog.h acqparamdialog.cpp
       acqparamdialog.ui
       advancedparamdialog.h advancedparamdialog.cpp
       advancedparamdialog.ui
       ui_mainwindow.h
       device.cpp
       ui_display.h
       ui_advancedparamdialog.h
       ui_acqparamdialog.h


   )
# Define target properties for Android with Qt 6 as:
#    set_property(TARGET eccoci APPEND PROPERTY QT_ANDROID_PACKAGE_SOURCE_DIR
#                 ${CMAKE_CURRENT_SOURCE_DIR}/android)
# For more information, see https://doc.qt.io/qt-6/qt-add-executable.html#target-creation
else()
   if(ANDROID)
       add_library(eccoci SHARED
           ${PROJECT_SOURCES}
       )
# Define properties for Android with Qt 5 after find_package() calls as:
#    set(ANDROID_PACKAGE_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/android")
   else()
       add_executable(eccoci
           ${PROJECT_SOURCES}
       )
   endif()
endif()

target_link_libraries(eccoci PRIVATE Qt${QT_VERSION_MAJOR}::Widgets)

target_link_libraries(eccoci PUBLIC ws2_32)

# Qt for iOS sets MACOSX_BUNDLE_GUI_IDENTIFIER automatically since Qt 6.1.
# If you are developing for iOS or macOS you should consider setting an
# explicit, fixed bundle identifier manually though.
# find_library(ws2_32_LIBRARY_PATH ws2_32)
add_library(ws2_32)
add_executable(Executive ${exec_src})
#target_link_libraries(Executive ${ws2_32_LIBRARY_PATH})
if(${QT_VERSION} VERSION_LESS 6.1.0)
 set(BUNDLE_ID_OPTION MACOSX_BUNDLE_GUI_IDENTIFIER com.example.eccoci)
endif()
set_target_properties(eccoci PROPERTIES
   ${BUNDLE_ID_OPTION}
   MACOSX_BUNDLE_BUNDLE_VERSION ${PROJECT_VERSION}
   MACOSX_BUNDLE_SHORT_VERSION_STRING ${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR}
   MACOSX_BUNDLE TRUE
   WIN32_EXECUTABLE TRUE
)

include(GNUInstallDirs)
install(TARGETS eccoci
   BUNDLE DESTINATION .
   LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
   RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
)

if(QT_VERSION_MAJOR EQUAL 6)
   qt_finalize_executable(eccoci)
endif()

error i get:

-- Could NOT find WrapVulkanHeaders (missing: Vulkan_INCLUDE_DIR) 
-- Configuring done (0.4s)
-- Generating done (0.0s)
-- Build files have been written to: C:/Users/User/Documents/build-eccoci-Desktop_Qt_6_6_2_MinGW_64_bit-Debug
[1/12 8.6/sec] Automatic MOC and UIC for target Executive
[2/11 14.8/sec] Automatic MOC and UIC for target ws2_32
[3/9 13.6/sec] Linking CXX executable Executive.exe
FAILED: Executive.exe 
C:\Windows\system32\cmd.exe /C "cd . && C:\Qt\Tools\mingw1120_64\bin\g++.exe -DQT_QML_DEBUG -g  CMakeFiles/Executive.dir/Executive_autogen/mocs_compilation.cpp.obj -o Executive.exe -Wl,--out-implib,libExecutive.dll.a -Wl,--major-image-version,0,--minor-image-version,0  -lkernel32 -luser32 -lgdi32 -lwinspool -lshell32 -lole32 -loleaut32 -luuid -lcomdlg32 -ladvapi32 && cd ."
C:/Qt/Tools/mingw1120_64/bin/../lib/gcc/x86_64-w64-mingw32/11.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: C:/Qt/Tools/mingw1120_64/bin/../lib/gcc/x86_64-w64-mingw32/11.2.0/../../../../x86_64-w64-mingw32/lib/../lib/libmingw32.a(lib64_libmingw32_a-crt0_c.o):crt0_c.c:(.text.startup+0x2e): undefined reference to `WinMain'
collect2.exe: error: ld returned 1 exit status
[4/9 13.0/sec] Automatic MOC and UIC for target eccoci
ninja: build stopped: subcommand failed.
15:16:15: The process "C:\Program Files\CMake\bin\cmake.exe" exited with code 1.
Error while building/deploying project eccoci (kit: Desktop Qt 6.6.2 MinGW 64-bit)
When executing step "Build"
15:16:15: Elapsed time: 00:01.

Christian Ehrlicher

@wwwsharq said in error: undefined reference to `__imp_WSAStartup':

target_link_libraries(eccoci PRIVATE Qt${QT_VERSION_MAJOR}::Widgets)

add_executable(Executive ${exec_src})

You create a library but don't link it to your executable.
Also you link the QtWidgets library private to your library which is wrong (as you expose QtWidgets stuff in your library to it's users). So either properly link public or link your executable also to QtWidgets.

SamiV123

If you're using visual studio (and cl) by far the easiest way is to

# pragma comment(lib, "ws2_32.lib")

the less you need to mess with CMake or (build files in general) the better.

Christian Ehrlicher

@SamiV123 said in error: undefined reference to `__imp_WSAStartup':

the less you need to mess with CMake or (build files in general) the better.

Using some non-standard stuff instead standarized scripting is for sure much better.
If you would have read the post from above you would see that the OP is using MinGW which does not support this crap.

SamiV123

@Christian-Ehrlicher said in error: undefined reference to `__imp_WSAStartup':

@SamiV123 said in error: undefined reference to `__imp_WSAStartup':

the less you need to mess with CMake or (build files in general) the better.

Using some non-standard stuff instead standarized scripting is for sure much better.
If you would have read the post from above you would see that the OP is using MinGW which does not support this crap.

Nothing standard about "scripting" (which I believe you use to refer to CMake) . But yeah, some of us prefer to have things the easy way and some don't...

Christian Ehrlicher

@SamiV123 said in error: undefined reference to `__imp_WSAStartup':

But yeah, some of us prefer to have things the easy way and some don't...

Your idea will simply not work for the OP...

Ketan__Patel__0011

@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")

JonB

@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....

Christian Ehrlicher

@JonB said in error: undefined reference to `__imp_WSAStartup':

They are not just an MSVC thing

The pragma is proprietary MSVC crap

JonB

@Christian-Ehrlicher I know. I was inviting @Ketan__Patel__0011 to consider his answer for the OP with MinGW in this light.

SamiV123

Using MingW on Windows when MSVS is free (and is essentially the de-facto standard C++ tool for Windows) is just bonkers.

Ketan__Patel__0011

@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 file

LIBS += -lWs2_32
LIBS += -lMswsock
LIBS += -lAdvApi32

JonB

@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_32 etc. explicitly to get the link to happen. Which is just what we said --- the #pragma is for MSVC only.

If you read what the OP is asking you will see that are using cmake, not qmake, no .pro file. So your LIBS lines 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

@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)

Christian Ehrlicher

@Ketan__Patel__0011 What are you discussing here? The op already used this three days ago...

target_link_libraries(eccoci PRIVATE ws2_32)

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error: undefined reference to `__imp_WSAStartup'