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[SGaist]

Did you use your device root filesystem to cross-compile build Qt 5 ? If not, you have probably used a different set of library than the one that's being used on your board

[BluTiGeS]

How can I use it?

I have just used the above written configure command.

[SGaist]

Add -sysroot /path/to/your/mounted/device/filesytem to your configure options

[BluTiGeS]

Thanks,

I have added it but now i get more and more errors.

So i changed back my config to following:
./configure -xplatform linux-arm-gnueabi-g++ -release -opensource -confirm-license -prefix /usr/local/Trolltech/qt5 -make libs -skip qtwebkit-examples -nomake tests -qt-zlib -qt-libpng -qt-libjpeg -qt-freetype -linuxfb -no-opengl -icu

Configure summary

Building on: linux-g++ (i386, CPU features: none detected)
Building for: linux-arm-gnueabi-g++ (arm, CPU features: neon)
Platform notes:

        - Also available for Linux: linux-kcc linux-icc linux-cxx

Build options:
Configuration .......... accessibility alsa audio-backend c++11 clock-gettime clock-monotonic compile_examples concurrent cross_compile dbus evdev eventfd freetype full-config getaddrinfo getifaddrs harfbuzz iconv icu inotify ipv6ifname large-config largefile linuxfb medium-config minimal-config mremap neon nis no-pkg-config openssl pcre png posix_fallocate precompile_header qpa qpa reduce_exports release rpath shared small-config xlib xrender zlib
Build parts ............ libs
Mode ................... release
Using C++11 ............ yes
Using gold linker....... no
Using PCH .............. yes
Target compiler supports:
Neon ................. yes

Qt modules and options:
Qt D-Bus ............... yes (loading dbus-1 at runtime)
Qt Concurrent .......... yes
Qt GUI ................. yes
Qt Widgets ............. yes
Large File ............. yes
QML debugging .......... yes
Use system proxies ..... no

Support enabled for:
Accessibility .......... yes
ALSA ................... yes
CUPS ................... no
Evdev .................. yes
FontConfig ............. no
FreeType ............... qt
Glib ................... no
GTK theme .............. no
HarfBuzz ............... yes (bundled copy)
Iconv .................. yes
ICU .................... yes
Image formats:
GIF .................. yes (plugin, using bundled copy)
JPEG ................. yes (plugin, using bundled copy)
PNG .................. yes (in QtGui, using bundled copy)
journald ............... no
mtdev .................. no
Networking:
getaddrinfo .......... yes
getifaddrs ........... yes
IPv6 ifname .......... yes
OpenSSL .............. yes (loading libraries at run-time)
NIS .................... yes
OpenGL / OpenVG:
EGL .................. no
OpenGL ............... no
OpenVG ............... no
PCRE ................... yes (bundled copy)
pkg-config ............. no
PulseAudio ............. no
QPA backends:
DirectFB ............. no
EGLFS ................ no
KMS .................. no
LinuxFB .............. yes
XCB .................. no
Session management ..... yes
SQL drivers:
DB2 .................. no
InterBase ............ no
MySQL ................ no
OCI .................. no
ODBC ................. no
PostgreSQL ........... yes (plugin)
SQLite 2 ............. yes (plugin)
SQLite ............... yes (plugin, using bundled copy)
TDS .................. no
udev ................... no
xkbcommon .............. no
zlib ................... yes (bundled copy)

But if I now do a make -j 4 I get an ICU warning, but ICU is needed for webkit, which I also need.

I../3rdparty/md4 -I../3rdparty/sha3 -I.moc -I../../mkspecs/linux-arm-gnueabi-g++ -o .obj/pcre16_compile.o ../3rdparty/pcre/pcre16_compile.c
tools/qtimezoneprivate_icu.cpp: In function ‘bool ucalOffsetsAtTime(void**, qint64, int*, int*)’:
tools/qtimezoneprivate_icu.cpp:145: error: ‘ucal_clone’ was not declared in this scope
tools/qtimezoneprivate_icu.cpp: In copy constructor ‘QIcuTimeZonePrivate::QIcuTimeZonePrivate(const QIcuTimeZonePrivate&)’:
tools/qtimezoneprivate_icu.cpp:285: error: ‘ucal_clone’ was not declared in this scope
tools/qtimezoneprivate_icu.cpp: In member function ‘virtual bool QIcuTimeZonePrivate::isDaylightTime(qint64) const’:
tools/qtimezoneprivate_icu.cpp:378: error: ‘ucal_clone’ was not declared in this scope
make[2]: *** [.obj/qtimezoneprivate_icu.o] Error 1
make[2]: *** Waiting for unfinished jobs....
make[2]: Leaving directory /home/qt/qt-everywhere-opensource-src-5.4.1/qtbase/src/corelib' make[1]: *** [sub-corelib-make_first] Error 2 make[1]: Leaving directory /home/qt/qt-everywhere-opensource-src-5.4.1/qtbase/src'
make: *** [sub-src-make_first] Error 2

EDIT:
I have updated the icu using the following Cross Tutorial
http://thebugfreeblog.blogspot.de/2013/05/cross-building-icu-for-applications-on.html

now I added the following to the configure :
-icu -I /opt/icuCrossFinal/include -L /opt/icuCrossFinal/lib

Now I got a bit further, I also needed a new linux-atomic version.

I keep you updated on webkit configure,

[BluTiGeS]

Now I got the qtbase and webkit compiled, but If i want to start the app via

./app -qpa linuxfb:/dev/fb0 it says:

This application failed to start because it could not find or load the Qt platform plugin "xcb".

I checked the dependencies on my Ubuntu 11.04 and I found that Ubuntu is unalbe to locate :
Unable to locate package libxcb-icccm4
Unable to locate package libxcb-icccm4-dev

I then run the configure with -no-xcb and all worked well so far.

But now if I start the application :

./app -qpa linuxfb:fb=/dev/fb0

The screen is not using the full framebuffer (no fullscreen) it seems it is only using 2/3 of it an the rest is cut off.
With qt4 all works as expected.

Any idea why this happens?

Is xcb required for a webkit usage on linuxfb?

[SGaist]

The plugin might have problem to detect the screen size

[BluTiGeS]

Any Idea how to fix this?
Also it seems qt5 is a bit slower then qt4, but I thought it should be faster.

[SGaist]

Did you try to give the screen size to the plugin ?

[BluTiGeS]

yep, but no influence it changes only to smaller sizes but not to the larger screen size like it should.

[SGaist]

Looks like a bug, you should check on the bug report system