Wrong QT_VERSION define dedected within Qt Creator
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Hey,
I use cmake files to build my Projects and have Qt 4.8 , Qt 5.1 and Qt 5.2 installed Qt 4.8 where installed through the package manager (yum). However, I use Qt 5.2 in my current Project and can compile it, but when I add a new Form file with .cpp and .hpp file, Qt creator adds the following line in the .hpp file.
@
#if QT_VERSION >= 0x050000
#include <QtWidgets/QDockWidget>
#else
#include <QtGui/QDockWidget>
#endif
@If I leave it that way my program crashes, because the define QT_VERSION is from the system qglobal.h file which is Qt version 4.8. But the project is setup for Qt version 5.2.
Has anybody an idea why this happens?Thanks in advance,
chris -
Hi and welcome to devnet,
Are you sure Qt Creator is setup correctly ? Kits/Qt Versions ?
-
I think so! :-)
Kits:
Auto-detected- Desktop Qt 5.2.0 GCC 64bit (default) "Pointing to Qt version 5.2.0"
Manual
- Qt4 "Pointing to Qt version Qt 4.8.5 (System)"
- Qt5 "Pointing to Qt version Qt 5.1.0"
Qt Versions (Path)
- /opt/Qt5.2.0/5.2.0/gcc_64/bin/
- /opt/Qt5/5.1.0/gcc_64/bin/qmake
- /usr/bin/qmake-qt4
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Hi,
[quote author="chrislux" date="1390655909"]when I add a new Form file with .cpp and .hpp file, Qt creator adds the following line in the .hpp file.
@
#if QT_VERSION >= 0x050000
#include <QtWidgets/QDockWidget>
#else
#include <QtGui/QDockWidget>
#endif
@
[/quote]What is your version of Qt Creator? (Help -> About Qt Creator...)Qt Creator 3.0.0 is the version needed for Qt 5.2, but it does not produce this code in UI headers.
[quote]If I leave it that way my program crashes[/quote]Do you mean it compiles successfully and crashes when you run it? Or does it fail to compile?
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bq. What is your version of Qt Creator? (Help -> About Qt Creator…)
Qt Creator 3.0.0
Based on Qt 5.2.0 (GCC 4.6.1, 64 bit)
Built on Dec 10 2013 at 11:45:55
From revision 27d10d8dcdbq. Do you mean it compiles successfully and crashes when you run it? Or does it fail to compile?
It compiles successfully, but crashes on startup!
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[quote]It compiles successfully, but crashes on startup![/quote]What is the error message? How did you run your program?
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The application output is:
Starting program
The program has unexpectedly finished.
program crashedI just hit Ctrl+R to run the program
However I just added a view compile flags in CMakeLists.txt
and it gives me now the warning that, QT_VERSION
@#ifdef QT_VERSION > 0x050000@is not defined!
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[quote author="chrislux" date="1390738513"]However I just added a view compile flags in CMakeLists.txt
and it gives me now the warning that, QT_VERSION
@#ifdef QT_VERSION > 0x050000@is not defined![/quote]It sounds like your CMake build system is broken. I'm not familiar with CMake, so I don't know how to fix it, sorry. Perhaps someone else can chime in.
Your Qt installation itself might be fine. What happens if you create a new "Qt Widgets Application" and then run it? (Don't modify the code)
[quote author="chrislux" date="1390738513"]The application output is:
Starting program
The program has unexpectedly finished.[/quote]That is a very generic message that means "your program crashed". To get more useful info, you usually need to run your program from a debugger. -
bq. That is a very generic message that means “your program crashed”. To get more useful info, you usually need to run your program from a debugger.
If I start the program with the build in debug tool from Qt Creator, it does not tell me much more.
- During startup program terminated with signal SIGSEGV, Segmentation fault.
bq. Your Qt installation itself might be fine. What happens if you create a new “Qt Widgets Application” and then run it? (Don’t modify the code)
That's pretty interesting, I created a new project (no cmake) using Qt version 5.2, as usual Qt Creator added the
@#if QT_VERSION >= 0x050000
#include <QtWidgets/QMainWindow>
#else
#include <QtGui/QMainWindow>
#endif@preprocessor statements. Again the first if statement isn't true.
Maybe it has something to do with the system variables? -
[quote author="chrislux" date="1390751578"]If I start the program with the build in debug tool from Qt Creator, it does not tell me much more.
- During startup program terminated with signal SIGSEGV, Segmentation fault.[/quote]The debugger provides a stack trace which shows the file and line number where the crash occurred, as well as the stack of function calls that led up to the crash.
[quote]That's pretty interesting, I created a new project (no cmake) using Qt version 5.2, as usual Qt Creator added the
@#if QT_VERSION >= 0x050000
#include <QtWidgets/QMainWindow>
#else
#include <QtGui/QMainWindow>
#endif@
preprocessor statements. Again the first if statement isn't true.
Maybe it has something to do with the system variables?[/quote]I have the exact same version of Qt Creator as you in Ubuntu, but mine never generates these preprocessor statements -- Qt Creator adds the correct header depending on what version of Qt I'm compiling with. My Windows copy of Creator does the same. I'm very curious where these statements come from.It's really unnecessary: #include <QMainWindow> will work on both Qt 4 and Qt 5.
Anyway,
When you created the new project, did you get a .pro file?
Which kit are you building with? (Mouse-over the little computer icon at the bottom-left of Creator. It should show your Project, Kit, Build, etc.
Open Tools -> Options -> Build & Run -> Qt Versions, and click on the version you see in (1). Expand "Details" next to "Qt version". Can you post the values listed there? (Name, ABI, Source, QT_INSTALL_*, QT_VERSION, etc.)
- During startup program terminated with signal SIGSEGV, Segmentation fault.[/quote]The debugger provides a stack trace which shows the file and line number where the crash occurred, as well as the stack of function calls that led up to the crash.
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bq. The debugger provides a stack trace which shows the file and line number where the crash occurred, as well as the stack of function calls that led up to the crash.
Well the problem is cmake, because when I try to compile the project with qmake (using .pro files) instead of cmake, I'll get compile errors
@ undefined reference to QWidget......@But when I compile the project with cmake I don't get a compile error!
The only warning it shows is that QT_VERSION is not defined!
Here is the stack-trace after SIGSEGV@0 ??
1 ?? /opt/Qt5.2.0/5.2.0/gcc_64/lib/libQt5Gui.so.5 0x7ffff71db8bc
2 QPainter::begin(QPaintDevice*) /opt/Qt5.2.0/5.2.0/gcc_64/lib/libQt5Gui.so.5 0x7ffff71dbea5
3 QDockWidget::paintEvent(QPaintEvent*) /opt/Qt5.2.0/5.2.0/gcc_64/lib/libQt5Widgets.so.5 0x7ffff7a27038
4 QWidget::event(QEvent*) /opt/Qt5.2.0/5.2.0/gcc_64/lib/libQt5Widgets.so.5 0x7ffff7930e41
5 QDockWidget::event(QEvent*) /opt/Qt5.2.0/5.2.0/gcc_64/lib/libQt5Widgets.so.5 0x7ffff7a2906b
6 QApplicationPrivate::notify_helper(QObject*, QEvent*) /opt/Qt5.2.0/5.2.0/gcc_64/lib/libQt5Widgets.so.5 0x7ffff78f8f34
7 QApplication::notify(QObject*, QEvent*) /opt/Qt5.2.0/5.2.0/gcc_64/lib/libQt5Widgets.so.5 0x7ffff78fc50e
8 QCoreApplication::notifyInternal(QObject*, QEvent*) /opt/Qt5.2.0/5.2.0/gcc_64/lib/libQt5Core.so.5 0x7ffff6ad0554
9 ?? /opt/Qt5.2.0/5.2.0/gcc_64/lib/libQt5Widgets.so.5 0x7ffff792da2b
10 QWidgetPrivate::paintSiblingsRecursive(QPaintDevice*, QList<QObject*> const&, int, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) /opt/Qt5.2.0/5.2.0/gcc_64/lib/libQt5Widgets.so.5 0x7ffff792e774
11 QWidgetPrivate::paintSiblingsRecursive(QPaintDevice*, QList<QObject*> const&, int, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) /opt/Qt5.2.0/5.2.0/gcc_64/lib/libQt5Widgets.so.5 0x7ffff792e50f
12 QWidgetPrivate::paintSiblingsRecursive(QPaintDevice*, QList<QObject*> const&, int, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) /opt/Qt5.2.0/5.2.0/gcc_64/lib/libQt5Widgets.so.5 0x7ffff792e50f
13 ?? /opt/Qt5.2.0/5.2.0/gcc_64/lib/libQt5Widgets.so.5 0x7ffff792d82e
14 ?? /opt/Qt5.2.0/5.2.0/gcc_64/lib/libQt5Widgets.so.5 0x7ffff7905409
15 ?? /opt/Qt5.2.0/5.2.0/gcc_64/lib/libQt5Widgets.so.5 0x7ffff7905569
16 ?? /opt/Qt5.2.0/5.2.0/gcc_64/lib/libQt5Widgets.so.5 0x7ffff7952a18
17 QApplicationPrivate::notify_helper(QObject*, QEvent*) /opt/Qt5.2.0/5.2.0/gcc_64/lib/libQt5Widgets.so.5 0x7ffff78f8f34
18 QApplication::notify(QObject*, QEvent*) /opt/Qt5.2.0/5.2.0/gcc_64/lib/libQt5Widgets.so.5 0x7ffff78fc50e
19 QCoreApplication::notifyInternal(QObject*, QEvent*) /opt/Qt5.2.0/5.2.0/gcc_64/lib/libQt5Core.so.5 0x7ffff6ad0554
20 QGuiApplicationPrivate::processExposeEvent(QWindowSystemInterfacePrivate::ExposeEvent*) /opt/Qt5.2.0/5.2.0/gcc_64/lib/libQt5Gui.so.5 0x7ffff6ff5d25
21 QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) /opt/Qt5.2.0/5.2.0/gcc_64/lib/libQt5Gui.so.5 0x7ffff6ffe275
22 QWindowSystemInterface::sendWindowSystemEvents(QFlagsQEventLoop::ProcessEventsFlag) /opt/Qt5.2.0/5.2.0/gcc_64/lib/libQt5Gui.so.5 0x7ffff6fe5ae8
23 ?? /opt/Qt5.2.0/5.2.0/gcc_64/plugins/platforms/libqxcb.so 0x7fffeb424fd0
24 g_main_context_dispatch /lib64/libglib-2.0.so.0 0x381b6492a6
25 g_main_context_iterate.isra.24 /lib64/libglib-2.0.so.0 0x381b649628
26 g_main_context_iteration /lib64/libglib-2.0.so.0 0x381b6496dc
27 QEventDispatcherGlib::processEvents(QFlagsQEventLoop::ProcessEventsFlag) /opt/Qt5.2.0/5.2.0/gcc_64/lib/libQt5Core.so.5 0x7ffff6b20fc4
28 QEventLoop::exec(QFlagsQEventLoop::ProcessEventsFlag) /opt/Qt5.2.0/5.2.0/gcc_64/lib/libQt5Core.so.5 0x7ffff6acf2cb
29 QCoreApplication::exec() /opt/Qt5.2.0/5.2.0/gcc_64/lib/libQt5Core.so.5 0x7ffff6ad333e
30 main main.cpp 19 0x4298d0@bq. When you created the new project, did you get a .pro file?
Yes!
@QT += core gui
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
TARGET = test
TEMPLATE = app
SOURCES += main.cpp
mainwindow.cpp
HEADERS += mainwindow.h
FORMS += mainwindow.ui@bq. Which kit are you building with? (Mouse-over the little computer icon at the bottom-left of Creator. It should show your Project, Kit, Build, etc.
Kit: Desktop Qt 5.2.0 GCC 64 bit
bq. Open Tools -> Options -> Build & Run -> Qt Versions, and click on the version you see in (1). Expand “Details” next to “Qt version”. Can you post the values listed there? (Name, ABI, Source, QT_INSTALL_*, QT_VERSION, etc.)
@Name: Qt 5.2.0 GCC 64bit
ABI: x86-linux-generic-elf-64bit
Source: /opt/Qt5.2.0/5.2.0/gcc_64
mkspec: linux-g++
qmake: /opt/Qt5.2.0/5.2.0/gcc_64/bin/qmake
Version: 5.2.0
QMAKE_SPEC linux-g++
QMAKE_VERSION 3.0
QMAKE_XSPEC linux-g++
QT_HOST_BINS /opt/Qt5.2.0/5.2.0/gcc_64/bin
QT_HOST_DATA /opt/Qt5.2.0/5.2.0/gcc_64
QT_HOST_LIBS /opt/Qt5.2.0/5.2.0/gcc_64/lib
QT_HOST_PREFIX /opt/Qt5.2.0/5.2.0/gcc_64
QT_INSTALL_ARCHDATA /opt/Qt5.2.0/5.2.0/gcc_64
QT_INSTALL_BINS /opt/Qt5.2.0/5.2.0/gcc_64/bin
QT_INSTALL_CONFIGURATION /etc/xdg
QT_INSTALL_DATA /opt/Qt5.2.0/5.2.0/gcc_64/
QT_INSTALL_DEMOS /opt/Qt5.2.0/5.2.0/gcc_64/examples
QT_INSTALL_DOCS /opt/Qt5.2.0/5.2.0/gcc_64/doc
QT_INSTALL_EXAMPLES /opt/Qt5.2.0/5.2.0/gcc_64/examples
QT_INSTALL_HEADERS /opt/Qt5.2.0/5.2.0/gcc_64/include
QT_INSTALL_IMPORTS /opt/Qt5.2.0/5.2.0/gcc_64/imports
QT_INSTALL_LIBEXECS /opt/Qt5.2.0/5.2.0/gcc_64/libexec
QT_INSTALL_LIBS /opt/Qt5.2.0/5.2.0/gcc_64/lib
QT_INSTALL_PLUGINS /opt/Qt5.2.0/5.2.0/gcc_64/plugins
QT_INSTALL_PREFIX /opt/Qt5.2.0/5.2.0/gcc_64
QT_INSTALL_QML /opt/Qt5.2.0/5.2.0/gcc_64/qml
QT_INSTALL_TESTS /opt/Qt5.2.0/5.2.0/gcc_64/tests
QT_INSTALL_TRANSLATIONS /opt/Qt5.2.0/5.2.0/gcc_64/translations
QT_SYSROOT
QT_VERSION 5.2.0
@ -
I know now why Qt Creator is adding this statement, there is a checkbox under Settings->Designer->Class Generation
In the groupbox Code Generation the checkbox ( Add Qt Version #ifdef for module names) was checked.But it still adds the wrong include of QMainWindow!
Should be:
@#include <QtWidgets/QMainWindow>@when using Qt version > 5
Instead of:
@#include <QtGui/QMainWindow>@
