QMetaType::registerType: Binary compatibility break — Size mismatch for type ‘QPaintB

[jiapei100]

Hi, all:


I'm testing Qt5 . I have Qt5 installed at /opt/Qt5.0.1 (still with some Qt4 libraries installed at /usr/lib/i386-linux-gnu/ ) .
However, whenever I tried to run my program, I got the following error message:

QMetaType::registerType: Binary compatibility break -- Size mismatch for type 'QPaintBufferCacheEntry' [1024]. Previously registered size 0, now registering size 12.
Aborted (core dumped)

People gave out several solutions, including:
1) make distclean ( refer to https://groups.google.com/forum/?fro...et/HTVYpo05-vw )
2) I can't see a solution but the topic has already been closed here
( https://bugreports.qt-project.org/br...s:all-tabpanel )


In addition,

$ echo $PATH
/usr/lib/lightdm/lightdm:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/opt/Qt5.0.1/5.0.1/gcc/bin

In my project .pro,

LIBS += -L/usr/lib \

# -L/usr/lib/i386-linux-gnu \

-L/opt/Qt5.0.1/5.0.1/gcc/lib \

clearly, I don't have Qt4 libraries linked, but only Qt5 library path included.










So, how to solve this problem? Thanks.


Pei

---

Added after 25 minutes:

It seems my problem comes from the newly installed Qt, due to the reason that I have Qt5 installed under /opt/Qt5 .
However, in my .pro file,

CONFIG += qt warn_on debug staticlib

How can I make sure this project is able to find my manually installed Qt5 ?

For now, the error

fatal error: QGraphicsView: No such file or directory

is telling I'm not able to find Qt5 ...


cheers
Pei

[wysota]

Path to Qt is embedded in qmake. So if you use qmake from Qt4, it will use Qt4, if you use qmake from Qt5, it will use Qt5.

[jiapei100]

Thanks wysota:

Firstly:
As you can see, I have

bq. $ echo $PATH
/usr/lib/lightdm/lightdm:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/opt/Qt5.0.1/5.0.1/gcc/bin


which means, I'm using qt5-qmake already !! In fact, I don't even have a 2nd qmake under /usr/bin



Secondly:
I guess the problem comes with QT configuration !! If I modify my original code from

#include <QWidget>

to

#include <QtWidgets/QWidget>

,
everything compiles !!!
Which seems to hint after I successfully Qt5,

CONFIG += qt

doesn't configure Qt correctly.

Anyway, I can compile my program now. But, how to solve the Qt configuration issue?


Cheers
Pei

[wysota]

I don't know what you are using just by seeing the path order. Invoke qmake -v and see for yourself what you are using. As for the compilation -- if you want to use widgets, make sure your project file contains a QT += widgets entry and rerun qmake.

[jiapei100]

Hi, thank you so much for your prompt reply wysota.

1)

$ qmake -v
QMake version 3.0
Using Qt version 5.0.1 in /opt/Qt5.0.1/5.0.1/gcc/lib

which means I'm using qt5.

QT += Widgets

QT += Widgets

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should make the trick. However, I got some new issues about qwt.


2) I'm now trying to build qwt with new qt5 qmake. However, I don't know how to specify the installation folder ? I tried:

qmake prefix=/usr
make
make install

However, qwt is always installed to /usr/local/qwt-6.1.0-rc3/

3) Even if I specify

INCLUDEPATH += /usr/local/qwt-6.1.0-rc3/include \

in .pro file, the project is still not able to find qwt include file, such as

#include <qwt_painter.h>

please do help. I need qwt for my project. Thank you .


Best Regards
Pei

I don't know what you are using just by seeing the path order. Invoke qmake -v and see for yourself what you are using. As for the compilation -- if you want to use widgets, make sure your project file contains a QT += widgets entry and rerun qmake.

[jiapei100]

Hi, wysota:

My qwt setting is of no problem now. However, this bug continues:

QMetaType::registerType: Binary compatibility break -- Size mismatch for type 'QPaintBufferCacheEntry' [1024]. Previously registered size 0, now registering size 12.
The program has unexpectedly finished.

Any suggestions please?


Thank you ...

Best Regards
Pei