QT Creator doesn`t create main.moc.

[malootki]

Hi. I`m totally beginner in QT. My problem is that I can`t compile examples like. Appchooser in Animation section. main.moc - no such file or directory. I didn`t change anything in a code. I qmake this manually but still nothing. Others examples, where class declaration is in .h file and definition in cpp works. I don`t have any idea why i can`t compile example

EDIT: My system is WIN7, QT Creator 4.7.0, QT 4.6.3 and 4.7.

[Zlatomir]

It does create it, but you should give the path to where qmake creates the file (now the generated files are not in the same folder with the files you create),
Solution 1: replace this line:

#include "main.moc"

#include "main.moc"

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with (you can check in the examples folder and see where the file is located):

#include "tmp\moc\release_shared\main.moc"

#include "tmp\moc\release_shared\main.moc"

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And make sure that you link the 4.7 example with 4.7 library (if you have two versions you can select witch one to use)

Or you can split the code from main.cpp and use an Pixmap.h and Pixmap.cpp for that class (and you won't have to include the .moc file)

[malootki]

Thank you very much. It works. Question is : Why QT creators didn`t include it like you?

PS. Sorry for my poor english.

[wysota]

You shouldn't need to do that. #include "main.moc" should work regardless of where the build directory is. There must be something else wrong there.

[Zlatomir]

@Wysota: That example is "weird", it contains the definition and the implementation of a class in the main.cpp and, as far as i know, in this case the .moc file needs to be included in the .cpp file. Is there another way?

Anyway: i didn't specified that the recommended solution is the second one: split the code from main.cpp and use an Pixmap.h, Pixmap.cpp and in main.cpp let only the the main function and necessary include (without the .moc include)

[Lykurg]

@Wysota: That example is "weird", it contains the definition and the implementation of a class in the main.cpp and, as far as i know, in this case the .moc file needs to be included in the .cpp file. Is there another way?

No, it must be there, but running qmake on such a file will normally set the correct path that make will find the moc file. Regardless where you compile it. Probably the make file was created before and then the path changed. Maybe a qmake rerun helps.

[Zlatomir]

The qmake re-run doesn't help
It "works" the same in on my main pc (Win 7), in linux (kubuntu) the same example runs fine with just #include "main.moc" (without path)

[Zlatomir]

Thank you very much. It works. Question is : Why QT creators didn`t include it like you?

Because it should work without specification of the path to that file, on linux it works, on windows it worked when the generated files where in the project folder, i guess that the mingw compiler search for that file only in project folder and can't find it because now the generated files (and .exe ...) are in a different folder. I didn't use this include very often, that is why i recommended you to split the example code in more files (a .h and a .cpp for that class) and in that case you don't need to include the .moc file

PS:sorry for double post

[wysota]

i guess that the mingw compiler search for that file only in project folder and can't find it because now the generated files (and .exe ...) are in a different folder.

That's what we have "-I" compiler directive and DEPENDPATH and INCLUDEPATH qmake variables. It should all work regardless of which platform you use unless you have a broken project file. Otherwise Qt itself wouldn't build.

[Zlatomir]

Wysota, thanks for the information, you are right it's only that "project" that doesn't work (i created a new one and it goes well)

Looks like the example project builds if we delete the "Release" and "tmp" folders form the project folder "appchooser", the compiler will generate the new ones in the folder "appchooser-build-desktop"

I still can't understand why in case of separate folders the old ones break the build, but when Qt Creator start to behave "strange" i think the deletion of old build files is what should be done first. Anyway i never had this problem with not finding a moc file because of the old build files.

[wysota]

It's not Creator that causes the behaviour - it is just a text editor, nothing more. It's the compiler (drived by (n)make) that decides what to process and how.