Qt in VS does not create an .exe

[Nazgul]

Hello,

I'm trying to compile a Qt file in VS 10 Ultimate, it compiles without any warning, but it does not create a .exe ( at least I could not find it in the files) and when I press f5 (start) it gives me this error:

Unable to start program .....

this application has failed etcetcetc

Google knows nothing for Qt

Thanks,

EDIT: / could be handy
things I installed:
VS 10
Qt Libraries for VS 2008
Qt plugin for VS

Do I need the SDK?

[Zlatomir]

Most likely it create an .exe that crashes at run-time.

Note that different versions of Visual Studio are not binary compatible, so the application built with Visual Studio 2010 will need the Qt dll's to be built with the same version (VS 2010) those Qt libraries you download (Qt Libraries for VS 2008) are not going to work, you will need to build Qt with Visual Studio 2010.

Some information of how to do that can be found: in this wiki, in official installation guide and here are the steps i used to successfully build Qt with VS 2010 (note that i didn't use any parameters for configure... the default is enough for me, you can look in the other two links information about those parameters)
//i recommend you download the source code (can be found here) if you try to rebuild the Qt Libraries for VS 2008 you might get errors because of the old built files (you can clean the built by running nmake distclean but i don't know if this saves you from all the issues, it is still a better idea to get the sources)

[Nazgul]

I download your opensource and the Windows SDK from QtSite and it still does not work. Do I've anything else to do?

Your source can't even get loaded in VS because there is no qmake

[Zlatomir]

The source needs to be built using the Visual Studio 2010, basically you need to extract the sources, navigate with the VS cmd in that folder and:
1) configure //see parameters in links before
2) nmake //you can use nmake sub-src (this builds the framework) and nmake sub-tools (builds the tools <designer,etc...>)
//nmake will take some time (~3 hours on my system)
3) you can use nmake clean //this will clean the temporary files used during the build - the folder is about 1.5 GB and was 4.5 GB before nmake clean
4) install the Add-in set the path to folder where you built Qt

//There are no Qt framework binaries for VS 2010 download, so if you have to use VS 2010 you will need to build the framework yourself.

[Nazgul]

Thanks,

I used

-configure // took not long
-nmake // about 7 hours , huh it gaves lots of warnings (actually 4) all the time

Now it works, but when I just click at my .exe it ask for Quid4.dll etc, how can I link them statically?

And how can instead of making an .exe a .dll . VS project settings .exe ->.dll gave me some errors.

[Zlatomir]

The warnings usually are in webkit module.

And on Windows you can copy the required dll's files in the same folder with your .exe file.
So copy the dll's form PATH_YOU_BUILT_QT\bin folder (example: C:\qt-4.7.2\bin ) in the folder where your application is.

Note that QtGuid4.dll and QtCored4.dll are the debug builds (and are bigger) those you don't usually need to deploy (the debug build of your application you use when debugging from Visual Studio) and then switch to build the release version of application which will need: QtGui4.dll and QtCore4.dll (and any other dll's for Qt modules you use in your application)

LE: you have built only the "dynamical" version of Qt (you need a parameter to configure and a rebuild for static) and note that there are some LGPL restrictions about static linkage of Qt in your application

Also when you deploy to another machine your application will also need the vcredist corresponding to your VS version (2010 in your case).

[Nazgul]

now I get this error:

moc_qttest.obj : error LNK2001: unresolved external symbol "public: static struct QMetaObject const QMainWindow::staticMetaObject" (?staticMetaObject@QMainWindow@@2UQMetaObject@@B)

moc_qttest.obj : error LNK2001: unresolved external symbol "public: static struct QMetaObject const QMainWindow::staticMetaObject" (?staticMetaObject@QMainWindow@@2UQMetaObject@@B)

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I linked the .libs etc, but still.

[yeroosmiler]

new to Qt but i am so curious to know something about it
i have started my basics of Qt, in one my book,
my question is :

how do i write a program that ask user to enter a number, and then checks weather the number is prime or not.it should use a QInputDialog to get number from the user and QMessage to display the result.

i have created my projects, below is my main.cpp:

#include<QApplication>
#include<QMessageBox>
#include<QInputDialog>

int main( int argc, char **argv )
{
QApplication app(argc, argv);



return 0;
}


and below is .pro


SOURCES += \
Question1.cpp



thank you