Hi,

I am building Buildroot for an imx8mm board. The HDMI display is up. I
validated the display using the fb-test. I am trying to enable a graphics
library, either gtk3 or qt5.

*gtk3 *
When I am enabling the gtk3 library, if I run the demo application, I am
getting the following error.

# /usr/bin/gtk3-demo

(gtk3-demo:350): Gtk-WARNING **: 01:21:03.518: cannot open display:
#

I have tried setting the display to localhost:0.0, did not work.

*QT5*
The widget library is not building. There is a compilation error:

qkeyeventtransition.o .obj/qmouseeventtransition.o
.obj/qbasickeyeventtransition.o .obj/qbasicmouseeventtransition.o
.obj/qgraphicseffect.o .obj/qpixmapfilter.o .obj/qrc_qstyle.o
.obj/qrc_qmessagebox.o .obj/moc_qwidgetrepaintmanager_p.o
.obj/moc_qwidget_p.o .obj/moc_qpixmapstyle_p.o  -latomic
/home/avijit/buildroot/output/build/qt5base-d16bf02a11953dcac01dca73e6f3778f293adefe/lib/libQt5Gui.so
/home/avijit/buildroot/output/build/qt5base-d16bf02a11953dcac01dca73e6f3778f293adefe/lib/libQt5Core.so
-lpthread  -lrt -lpthread -ldl
ln -s libQt5Widgets.so.5.15.8 libQt5Widgets.so
ln -s libQt5Widgets.so.5.15.8 libQt5Widgets.so.5
ln -s libQt5Widgets.so.5.15.8 libQt5Widgets.so.5.15
rm -f ../../lib/libQt5Widgets.so.5.15.8
mv -f libQt5Widgets.so.5.15.8 ../../lib/libQt5Widgets.so.5.15.8
rm -f ../../lib/libQt5Widgets.so
rm -f ../../lib/libQt5Widgets.so.5
rm -f ../../lib/libQt5Widgets.so.5.15
mv -f libQt5Widgets.so ../../lib/libQt5Widgets.so
mv -f libQt5Widgets.so.5 ../../lib/libQt5Widgets.so.5
mv -f libQt5Widgets.so.5.15 ../../lib/libQt5Widgets.so.5.15
make[2]: *** [Makefile:51: sub-src-make_first] Error 2
make[1]: *** [package/pkg-generic.mk:292:
/home/avijit/buildroot/output/build/qt5base-d16bf02a11953dcac01dca73e6f3778f293adefe/.stamp_built]
Error 2
make: *** [Makefile:84: _all] Error 2

I have attached the config file. Can you please suggest?

Thanks,
Avijit