Libraries Conflict, SDL and Qt

fjctp

Hi,

I tried to use SDL to access my joystick and use Qt for GUI. However, I got this error when I compile the code.

SDLmain.lib(SDL_win32_main.obj):-1: error: LNK2005: _WinMain@16 already defined in qtmaind.lib(qtmain_win.obj)

I am using Qt 5.1.0 and SDL 1.2.15

Thank you

@
QT += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = joystick_GUI
TEMPLATE = app

LIBS += -L"C:/libs/SDL-1.2.15/lib/x86" -lSDL -lSDLmain

INCLUDEPATH += C:/libs/SDL-1.2.15/include

SOURCES += main.cpp
joystick_gui.cpp
joystick.cpp

HEADERS += joystick_gui.h
joystick.h

FORMS += joystick_gui.ui
@

dbzhang800

Hi, I am not familiar with SDL, but you can give a try to add following lines to your pro file, then run qmake

@
CONFIG-=windows
QMAKE_LFLAGS += $$QMAKE_LFLAGS_WINDOWS
@

fjctp

That works! but do you mind explain to me what each line does?

Thank you

The other way around is removing qtmain from build.
@
QMAKE_LIBS_QT_ENGTRY =
@

dbzhang800

Ok, I write a blog right now.

hope it's useful for you.

fjctp

Your blog is very informative, thank you so much!