I'm having difficulty running any Qt5 application. These are the
commands I'm issuing:
XWin -multiwindow &
export DISPLAY=:0.0
xclock &
and I see the clock, so X is up and running. Then:
/usr/lib/qt5/examples/gui/analogclock/analogclock
QXcbConnection: XCB error: 145 (Unknown), sequence: 162, resource
id: 0, major c
ode: 140 (Unknown), minor code: 20
Bad system call (core dumped)
and no clock.
I've tried compiling a really trivial Qt5 example (attached):
g++ -I/usr/include/qt5 -I/usr/include/qt5/QtWidgets
-I/usr/include/qt5/QtGui \
-o qt5-demo qt5-demo.cpp -lQt5Widgets -lQt5Core
And then running ./qt5-demo gives:
QObject::connect: signal not found in QPushButton
QObject::connect: signal not found in QWidget
QObject::connect: signal not found in QWidget
QXcbConnection: XCB error: 145 (Unknown), sequence: 162, resource
id: 0, major
code: 140 (Unknown), minor code: 20
Bad system call (core dumped)
The demo runs fine in Fedora 21. It also runs in Cygwin when compiled
with Qt4:
g++ -I/usr/include/qt4 -I/usr/include/qt4/QtGui -o qt5-demo
qt5-demo.cpp \
-lQtGui -lQtCore
And now running the (incorrectly-named!) ./qt5-demo launches the
application.
Please could you advise what I'm doing wrong.
Many thanks in advance,
Dave.
#include
#include
int main(int argc, char** argv)
{
QApplication app(argc, argv);
QPushButton *button = new QPushButton("Hello!");
QObject::connect(button, SIGNAL(clicked()), &app, SLOT(quit()));
button->show();
return app.exec();
}
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