[Closed] Unable to run Qt app on ARM linux with an /tmp and /dev/fb0 issues

kiranqt

My host system is Ubuntu-12.04 x86_64bit
My target system is Pandaboard- ARMv7 Ubuntu-12.04
My toolchain is arm-linux-gnueabihf-
I configured Device type as Desktop in Qt Creator->Tools->Options

I am successful in compiling Qt source on host system with qmake.conf as

qmake configuration for building with arm-panda-g++

include(../../common/linux.conf)
include(../../common/gcc-base-unix.conf)
include(../../common/g++-unix.conf)
include(../../common/qws.conf)

modifications to g++.conf

QMAKE_CC = arm-linux-gnueabihf-gcc
QMAKE_CXX = arm-linux-gnueabihf-g++
QMAKE_LINK = arm-linux-gnueabihf-g++
QMAKE_LINK_SHLIB = arm-linux-gnueabihf-g++

modifications to linux.conf

QMAKE_AR = arm-linux-gnueabihf-ar cqs
QMAKE_OBJCOPY = arm-linux-gnueabihf-objcopy
QMAKE_STRIP = arm-linux-gnueabihf-strip

load(qt_config)

and build Qt src with following configuration

./configure -opensource -confirm-license -prefix /opt/qt-panda-armhf -embedded arm -platform qws/linux-x86_64-g++ -xplatform qws/linux-panda-g++ -no-pch -little-endian

After this i copied /opt/qt-panda-armhf/lib from host to the target with same location as /opt/qt-panda-armhf/lib.

Then i built qt app in QtCreator , by setting qmake, after building qt source with above mentioned qmake.conf. and setting arm-linux-gnueabihf- g++ compiler.

I am successful in building qt gui app in qtcreator and got executable file.

Then i copied the executable onto pandaboard target board and run by exporting the /opt/qt-panda-armhf/lib

run as
$ ./my_app -qws

But i am unable to run the app. with following issue
Cannot create Qt for Embedded Linux data directory: /tmp/qtembedded-0

< for this i tried by changing /tmp folder in qt src path to user directory
But got the same error as
Cannot create Qt for Embedded Linux data directory: ~/App/temp/qtembedded-0 >

< even i tried with mount point in /etc/fstab as
none /tmp/ tmpfs size=1M 0 0
But in this case also iam unable to run

One more issue i found when running app as
$ ./my_app
then i got the issue as QScreenLinuxFb::connect: No such file or directory
Error opening frame buffer device /dev/fb0

< for this i tried

$ ./my_app -qws -display LinuxFb

But i am unsuccessful>

need help regarding the same...

SGaist

Hi, posting in one sub-forum is enough.

Please don't multi-post.

"Duplicate":http://qt-project.org/forums/viewthread/29897/