Configuration for QPA?

[minamiman]

Hi everyone?

I want to display a triangle by qglwidget in embedded system that have mali400.
first of all, I did compile qt-everywhere... 4.8.4 with xplatform qws/linux-arm-g++ option
but qglwidget display only black...
and, I did googling that, I read some post that is qws have many trouble when using qglwidget

Question 1.
qpa is useful than qws?

so, I did compile again with -qpa xflatform arm-linux-gnueabi-g++ option,
at this time, I meet below error message...

=================== error message =========================
root@corelogic:~# ./openes2Test -qpa
QWSSocket::connectToLocalFile could not connect:: Connection refused
QWSSocket::connectToLocalFile could not connect:: Connection refused
QWSSocket::connectToLocalFile could not connect:: Connection refused
No Qt for Embedded Linux server appears to be running.
If you want to run this program as a server,
add the "-qws" command-line option.

Question 2.
what is the configuration option for qpa?
when I did configuraion with my configuratio, I meet below message
No license exists to enable Qt QPA. Disabling....
qpa is not support in embedded system(arm)?

my configuration option for qt-embedded is

 ./configure -v -opensource -confirm-license -release -embedded arm -achr arm -prefix /project/qte-qpa  -qpa -no-neon -no-mmx -static -little-endian -no-accessibility -shared -no-cups -no-stl -qt-libpng -qt-libjpeg -no-qvfb -no-dbus -qt-freetype -no-nis -no-qt3support -no-largefile -no-libmng -no-separate-debug-info -nomake examples -nomake docs -nomake tools -depths 16,18,24 -optimized-qmake -pch -qt-libjpeg -qt-zlib -no-libtiff -ptmalloc -no-webkit -no-script -no-scripttools -xplatform linux-arm-gnueabi-g++ -qt-mouse-tslib -I/home/tslib-master/arm_tslib/include -L/home/tslib-master/arm_tslib/lib -opengl -I/home/work/qt/OpenGLES_QT/OpenGLES -L/home/mali_drv 2>&1 | tee config.log

Question 3.
when I do compile application, I have to change the compile option?
compile option is differet to qws?

otherwise, what is the reason is qglwidget is black?

thanks...