[Qt-interest] Compiling OpenGL/SDL application on Windows, linker problems, undefined reference to qMain(int, char**)
David Rappo
david.rappo at gmail.com
Sat Mar 21 05:18:01 CET 2009
Hi,
I tried adding QT -= gui to my profile.
The result is:
mingw32-make -f Makefile.Debug all
mingw32-make[1]: Entering directory
`C:/Users/David/Development/Tetris_SDL/Tetris'
g++ -c -g -frtti -fno-exceptions -Wall -DUNICODE
-DQT_LARGEFILE_SUPPORT -DQT_DLL -DQT_OPENGL_LIB -DQT_CORE_LIB
-DQT_THREAD_SUPPORT
-I"c:\Qt\MinGW\qt-win-opensource-src-4.5.0\include\QtCore"
-I"c:\Qt\MinGW\qt-win-opensource-src-4.5.0\include\QtOpenGL"
-I"c:\Qt\MinGW\qt-win-opensource-src-4.5.0\include" -I"."
-I"C:\libvectormath\simdvectormath\vectormathlibrary\include\vectormath\scalar\cpp"
-I"C:\SDL\SDL_Win32_MinGW\SDL-1.2.13\include\SDL"
-I"C:\Users\David\Development\Aurora\Aurora_Debug_Library"
-I"C:\Users\David\Development\Aurora\Aurora_Math_Library"
-I"C:\Users\David\Development\Aurora\Aurora_Render_Library"
-I"c:\Qt\MinGW\qt-win-opensource-src-4.5.0\include\ActiveQt" -I"debug"
-I"." -I"c:\Qt\MinGW\qt-win-opensource-src-4.5.0\mkspecs\win32-g++" -o
debug\Main.o Main.cpp
g++ -enable-stdcall-fixup -Wl,-enable-auto-import
-Wl,-enable-runtime-pseudo-reloc -Wl,-subsystem,console -o
debug\Tetris_Debug.exe debug/Main.o
-L"c:\Qt\MinGW\qt-win-opensource-src-4.5.0\lib" -lopengl32 -lglu32
-lgdi32 -luser32 -LC:\Users\David\Development\Aurora/Binary
-lAurora_Render_Library_Debug
-LC:\Users\David\Development\Aurora/Binary -lAurora_Math_Library_Debug
-LC:\Users\David\Development\Aurora/Binary
-lAurora_Debug_Library_Debug -LC:/MinGW/lib -lmingw32
-LC:\SDL\SDL_Win32_MinGW\SDL-1.2.13\lib -lSDLmain
-LC:\SDL\SDL_Win32_MinGW\SDL-1.2.13\lib -lSDL -lQtOpenGLd4 -lQtCored4
debug/Main.o: In function `SDL_main':
C:/Users/David/Development/Tetris_SDL/Tetris/Main.cpp:35: undefined
reference to `_imp___ZN12QApplicationC1ERiPPci'
C:/Users/David/Development/Tetris_SDL/Tetris/Main.cpp:41: undefined
reference to `QApplication::~QApplication()'
C:/Users/David/Development/Tetris_SDL/Tetris/Main.cpp:48: undefined
reference to `QApplication::~QApplication()'
C:/Users/David/Development/Tetris_SDL/Tetris/Main.cpp:63: undefined
reference to `QApplication::~QApplication()'
collect2: ld returned 1 exit status
mingw32-make[1]: *** [debug\Tetris_Debug.exe] Error 1
mingw32-make[1]: Leaving directory
`C:/Users/David/Development/Tetris_SDL/Tetris'
mingw32-make: *** [debug-all] Error 2
Thanks,
David
2009/3/20 Benjamin Sonnemann <b.sonnemann at gmail.com>:
> Try this in pro file:
>
> QT -= gui
>
> But i dont know whether its wise what you do there. The problem with
> -lSDLmain is, it redefines your main(int, char**)
> to sth like SDL_main(int, char**) and places its own code in the _real_ main
> to do its bootstrapping. Now Qt seems to
> do sth similar ( need someone with more deeper Qt knowledge here, as i am
> relative fresh into Qt). Hopefully its only
> needed for gui classes, because then it should be fine.
>
> Benjamin Sonnemann
>
>
> On Fri, Mar 20, 2009 at 11:02 AM, David Rappo <david.rappo at gmail.com> wrote:
>>
>> Hi,
>>
>> I am trying to build an OpenGL/SDL application on Windows. I'm using
>> qmake to generate my make files. The application runs fine on Linux,
>> but I ran into linker problems when I tried to build on Windows. I've
>> pasted my pro file below (I'm writing a Tetris clone).
>>
>> // Linker errors
>>
>> //////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
>>
>> In file included from
>> C:/SDL/SDL_Win32_MinGW/SDL-1.2.13/include/SDL/SDL.h:28,
>> from Main.cpp:5:
>> C:/SDL/SDL_Win32_MinGW/SDL-1.2.13/include/SDL/SDL_main.h:50:1:
>> warning: "main" redefined
>> In file included from
>> c:/Qt/MinGW/qt-win-opensource-src-4.5.0/include/QtGui/qwindowdefs.h:1,
>> from
>>
>> c:/Qt/MinGW/qt-win-opensource-src-4.5.0/include/QtGui/../../src/gui/kernel/qevent.h:45,
>> from
>> c:/Qt/MinGW/qt-win-opensource-src-4.5.0/include/QtGui/qevent.h:1,
>> from
>>
>> c:/Qt/MinGW/qt-win-opensource-src-4.5.0/include/QtGui/../../src/gui/accessible/qaccessible.h:52,
>> from
>> c:/Qt/MinGW/qt-win-opensource-src-4.5.0/include/QtGui/qaccessible.h:1,
>> from
>> c:/Qt/MinGW/qt-win-opensource-src-4.5.0/include/QtGui/QtGui:4,
>> from
>> c:/Qt/MinGW/qt-win-opensource-src-4.5.0/include/QtOpenGL/QtOpenGL:4,
>> from Main.cpp:3:
>>
>> c:/Qt/MinGW/qt-win-opensource-src-4.5.0/include/QtGui/../../src/gui/kernel/qwindowdefs.h:147:1:
>> warning: this is the location of the previous definition
>> g++ -enable-stdcall-fixup -Wl,-enable-auto-import
>> -Wl,-enable-runtime-pseudo-reloc -Wl,-s -Wl,-subsystem,windows -o
>> release\Tetris.exe release/Main.o
>> -L"c:\Qt\MinGW\qt-win-opensource-src-4.5.0\lib" -lopengl32 -lglu32
>> -lgdi32 -luser32 -lmingw32 -lqtmain
>> -LC:\Users\David\Development\Aurora/Binary -lAurora_Render_Library
>> -LC:\Users\David\Development\Aurora/Binary -lAurora_Math_Library
>> -LC:\Users\David\Development\Aurora/Binary -lAurora_Debug_Library
>> -LC:/MinGW/lib -lmingw32 -LC:\SDL\SDL_Win32_MinGW\SDL-1.2.13\lib
>> -lSDLmain -LC:\SDL\SDL_Win32_MinGW\SDL-1.2.13\lib -lSDL -lQtOpenGL4
>> -lQtGui4 -lQtCore4
>>
>> c:\Qt\MinGW\qt-win-opensource-src-4.5.0\lib/libqtmain.a(qtmain_win.o):qtmain_win.cpp:(.text+0x130):
>> undefined reference to `qMain(int, char**)'
>> // End linker errors
>>
>> //////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
>>
>> If the following lines are commented out:
>>
>> LIBS += -LC:/MinGW/lib -lmingw32
>> LIBS += -L$(SDL_LIBRARY_PATH) -lSDLmain
>>
>> I get:
>>
>> // Linker errors
>>
>> //////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
>> /mingw/lib/libmingw32.a(main.o):main.c:(.text+0xbd): undefined
>> reference to `WinMain at 16'
>> // End linker errors
>>
>> //////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
>>
>> Has anybody done this? I don't need to use QWidgets. I only need to
>> use some of the classes in QtCore such as QString and QFile.
>>
>> I've spent some time searching the Internet, and I've found lots of
>> posts about undefined references to `WinMain at 16', but nothing that
>> applies to my situation.
>>
>> Is there any way to do what I want to do without having to install
>> Cygwin or mysys?
>>
>> Many thanks,
>>
>> David
>>
>> ######################################################################
>> # Tetris.pro
>> ######################################################################
>>
>> TEMPLATE = app
>>
>> DEPENDPATH += .
>>
>> INCLUDEPATH += .
>> INCLUDEPATH += $(LIBVECTORMATH_PATH)/scalar/cpp
>> INCLUDEPATH += $(SDL_INCLUDE_PATH)
>>
>> CONFIG += debug_and_release
>> CONFIG += build_all
>>
>> CONFIG(debug, debug|release) {
>> win32: CONFIG += console
>>
>> TARGET = Tetris_Debug
>> } else {
>> DEFINES += QT_NO_DEBUG_OUTPUT
>> DEFINES += QT_NO_WARNING_OUTPUT
>> DEFINES += QT_NO_DEBUG
>>
>> TARGET = Tetris
>> }
>>
>> # Not necessary on Linux
>> LIBS += -LC:/MinGW/lib -lmingw32
>> # Not necessary on Linux
>> LIBS += -L$(SDL_LIBRARY_PATH) -lSDLmain
>> # Same on Linux and Windows
>> LIBS += -L$(SDL_LIBRARY_PATH) -lSDL
>>
>> QT += opengl
>>
>> ######################################################################
>> # Headers
>> ######################################################################
>>
>> #HEADERS += file.h
>>
>> ######################################################################
>> # Sources
>> ######################################################################
>>
>> SOURCES += Main.cpp
>>
>> // Main.cpp
>>
>> #include <QtCore>
>> //#include <QtGui>
>> #include <QtOpenGL>
>> #include "vectormath_aos.h"
>> #include "SDL.h"
>>
>>
>> //
>> --------------------------------------------------------------------------------
>> // Global variables
>> //
>> --------------------------------------------------------------------------------
>>
>> const SDL_VideoInfo* g_SDL_VideoInfo = 0;
>> SDL_Surface* g_SDL_Surface = 0;
>> QSize g_Client_Area_Size(800, 600);
>> bool g_Quit = false;
>>
>> //
>> --------------------------------------------------------------------------------
>> // Global functions
>> //
>> --------------------------------------------------------------------------------
>>
>> void Process_Events(void);
>> void Display_Scene(void);
>> void Setup_Render_States(void);
>> void Reshape(int in_Width, int in_Height);
>> bool Setup_Video(void);
>>
>> //
>> --------------------------------------------------------------------------------
>> // main
>> //
>> --------------------------------------------------------------------------------
>>
>> int main(int argc, char *argv[])
>> {
>> AURORA_DEBUG_METHOD_SCOPE;
>>
>> QApplication l_Application(argc, argv);
>>
>> if ( SDL_Init(SDL_INIT_VIDEO) == -1 )
>> {
>> //QMessageBox::warning(0, "SDL", "SDL_Init returned -1");
>> SDL_Quit();
>> return 1;
>> }
>>
>> if (!Setup_Video())
>> {
>> //QMessageBox::warning(0, "SDL", "Setup_Video returned
>> false");
>> SDL_Quit();
>> return 1;
>> }
>>
>> Setup_Render_States();
>>
>> qDebug() << "Entering main game loop\n";
>>
>> while (g_Quit == false)
>> {
>> Process_Events();
>> Display_Scene();
>> }
>>
>> SDL_Quit();
>>
>> return 0;
>> }
>>
>> void Process_Events(void)
>> {
>> SDL_Event l_SDL_Event;
>>
>> while ( SDL_PollEvent(& l_SDL_Event) )
>> {
>> switch (l_SDL_Event.type)
>> {
>> case SDL_VIDEORESIZE:
>> {
>> qDebug() << "SDL_VIDEORESIZE" << "\n";
>> qDebug() << "l_SDL_Event.resize.w == " <<
>> l_SDL_Event.resize.w << "\n";
>> qDebug() << "l_SDL_Event.resize.h == " <<
>> l_SDL_Event.resize.h << "\n";
>>
>> Reshape( l_SDL_Event.resize.w,
>> l_SDL_Event.resize.h );
>> }
>> break;
>> case SDL_KEYDOWN:
>> {
>> if (l_SDL_Event.key.keysym.sym ==
>> SDLK_SPACE)
>> {
>> qDebug() << "Space key pressed!\n";
>> }
>>
>> if (l_SDL_Event.key.keysym.sym ==
>> SDLK_ESCAPE)
>> {
>> qDebug() << "Escape key
>> pressed!\n";
>> g_Quit = true;
>> }
>> }
>> break;
>> case SDL_KEYUP:
>> {
>> if (l_SDL_Event.key.keysym.sym ==
>> SDLK_SPACE)
>> {
>> qDebug() << "Space key
>> released!\n";
>> }
>>
>> if (l_SDL_Event.key.keysym.sym ==
>> SDLK_ESCAPE)
>> {
>> qDebug() << "Escape key
>> released!\n";
>> }
>> }
>> break;
>>
>> case SDL_MOUSEBUTTONDOWN:
>> {
>> Uint8 l_Mouse_Button =
>> l_SDL_Event.button.button;
>> QString l_Mouse_Button_String = (
>> (l_Mouse_Button ==
>> SDL_BUTTON_LEFT) ? "SDL_BUTTON_LEFT" : "SDL_BUTTON_RIGHT" );
>> qDebug() << "SDL_MOUSEBUTTONDOWN: " <<
>> l_Mouse_Button_String << "\n";
>> }
>> break;
>>
>> case SDL_MOUSEBUTTONUP:
>> {
>> Uint8 l_Mouse_Button =
>> l_SDL_Event.button.button;
>> QString l_Mouse_Button_String = (
>> (l_Mouse_Button ==
>> SDL_BUTTON_LEFT) ? "SDL_BUTTON_LEFT" : "SDL_BUTTON_RIGHT" );
>> qDebug() << "SDL_MOUSEBUTTONUP: " <<
>> l_Mouse_Button_String << "\n";
>> }
>> break;
>>
>> case SDL_QUIT:
>> {
>> qDebug() << "SDL_QUIT" << "\n";
>> g_Quit = true;
>> }
>> break;
>> }
>> }
>> }
>>
>> void Display_Scene(void)
>> {
>> glClear(GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT);
>>
>> glLoadIdentity();
>>
>> SDL_GL_SwapBuffers();
>> }
>>
>> void Setup_Render_States(void)
>> {
>> GLfloat l_Red = 1.0;
>> GLfloat l_Green = 1.0;
>> GLfloat l_Blue = 1.0;
>> GLfloat l_Alpha = 0.0f;
>>
>> glClearColor(l_Red, l_Green, l_Blue, l_Alpha);
>>
>> glEnable(GL_DEPTH_TEST);
>> glShadeModel(GL_SMOOTH);
>>
>> glPolygonMode(GL_FRONT, GL_LINE);
>> glPolygonMode(GL_BACK, GL_LINE);
>>
>> glEnable(GL_CULL_FACE);
>> glCullFace(GL_BACK);
>> }
>>
>> void Reshape(int in_Width, int in_Height)
>> {
>> g_Client_Area_Size.setWidth(in_Width);
>> g_Client_Area_Size.setHeight(in_Height);
>>
>> if (!Setup_Video())
>> {
>> SDL_Quit();
>> g_Quit = true;
>> return;
>> }
>>
>> glViewport (0, 0, (GLsizei) g_Client_Area_Size.width(), (GLsizei)
>> g_Client_Area_Size.height());
>> glMatrixMode(GL_PROJECTION);
>> glLoadIdentity();
>> gluOrtho2D(0.0, g_Client_Area_Size.width(), 0.0,
>> g_Client_Area_Size.height());
>> glMatrixMode(GL_MODELVIEW);
>> }
>>
>> bool Setup_Video(void)
>> {
>> g_SDL_VideoInfo = SDL_GetVideoInfo();
>> if (g_SDL_VideoInfo == 0)
>> {
>> return false;
>> }
>>
>> SDL_GL_SetAttribute( SDL_GL_RED_SIZE, 8 );
>> SDL_GL_SetAttribute( SDL_GL_GREEN_SIZE, 8 );
>> SDL_GL_SetAttribute( SDL_GL_BLUE_SIZE, 8 );
>> SDL_GL_SetAttribute( SDL_GL_DEPTH_SIZE, 16 );
>> SDL_GL_SetAttribute( SDL_GL_DOUBLEBUFFER, 1 );
>>
>> g_SDL_Surface = SDL_SetVideoMode(g_Client_Area_Size.width(),
>> g_Client_Area_Size.height(), g_SDL_VideoInfo->vfmt->BitsPerPixel,
>> SDL_OPENGL|SDL_RESIZABLE);
>> if (g_SDL_Surface == 0)
>> {
>> return false;
>> }
>>
>> return true;
>> }
>> _______________________________________________
>> Qt-interest mailing list
>> Qt-interest at trolltech.com
>> http://lists.trolltech.com/mailman/listinfo/qt-interest
>
>
More information about the Qt-interest-old
mailing list