The problem : I can't run my Qt5 app as a normal X window. It is always full screen.
I successfully compiled Qt5 and I can deploy a simple program to the RPi : Qt Creator uploads the executable to the RPi and runs it. The widget shows up full-screen on a HDMI attached monitor. The problem is that I can't switch applications, and I can't view the program widget on another computer screen (ubuntu or windows).
I configured a VNC server on the RPi, which works fine. I'd like to run the RPi without a monitor and connect via VNC from time to time to check my program. Ssh X forwarding doesn't work either.
configure -opengl es2 -device linux-rasp-pi-g++ -device-option CROSS_COMPILE=/home/USERNAME/opt/rpi/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian-x64/bin/arm-linux-gnueabihf- -sysroot /mnt/rpi -opensource -confirm-license -optimized-qmake -release -make libs -prefix /usr/local/qt5pi -no-pch -qt-xcb
And the config.summary file contents :
Configure summary
Building on: linux-g++ (x86_64, CPU features: mmx sse sse2)
Building for: devices/linux-rasp-pi-g++ (arm, CPU features:)
Platform notes:
- Also available for Linux: linux-kcc linux-icc linux-cxx
Build options:
Configuration .......... accessibility audio-backend c++11 clock-gettime clock-monotonic compile_examples concurrent cross_compile egl eglfs evdev eventfd freetype full-config getaddrinfo getifaddrs iconv inotify ipv6ifname large-config largefile linuxfb medium-config minimal-config mremap nis no-harfbuzz opengl opengles2 pcre png posix_fallocate qpa qpa reduce_exports release rpath shared small-config system-zlib xcb xcb-plugin xcb-qt xkbcommon-qt xlib
Build parts ............ libs
Mode ................... release
Using C++11 ............ yes
Using PCH .............. no
Target compiler supports:
iWMMXt/Neon .......... no/auto
Qt modules and options:
Qt D-Bus ............... no
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 ................... no
CUPS ................... no
Evdev .................. yes
FontConfig ............. no
FreeType ............... yes (bundled copy)
Glib ................... no
GTK theme .............. no
HarfBuzz ............... no
Iconv .................. yes
ICU .................... no
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 .............. no
NIS .................... yes
OpenGL / OpenVG:
EGL .................. yes
OpenGL ............... yes (OpenGL ES 2.x)
OpenVG ............... no
PCRE ................... yes (bundled copy)
pkg-config ............. yes
PulseAudio ............. no
QPA backends:
DirectFB ............. no
EGLFS ................ yes
KMS .................. no
LinuxFB .............. yes
XCB .................. yes (bundled copy)
EGL on X ........... no
GLX ................ no
MIT-SHM ............ yes
Xcb-Xlib ........... no
Xcursor ............ yes (loaded at runtime)
Xfixes ............. yes (loaded at runtime)
Xi ................. yes (loaded at runtime)
Xi2 ................ no
Xinerama ........... yes (loaded at runtime)
Xrandr ............. yes (loaded at runtime)
Xrender ............ no
XKB ................ yes
XShape ............. yes
XSync .............. yes
XVideo ............. yes
Session management ..... yes
SQL drivers:
DB2 .................. no
InterBase ............ no
MySQL ................ no
OCI .................. no
ODBC ................. no
PostgreSQL ........... no
SQLite 2 ............. no
SQLite ............... yes (plugin, using bundled copy)
TDS .................. no
udev ................... no
xkbcommon .............. yes (bundled copy, XKB config root: /usr/share/X11/xkb)
zlib ................... yes (system library)
NOTE: libxkbcommon and libxkbcommon-x11 0.4.1 or higher not found on the system, will use
the bundled version from 3rd party directory.
NOTE: Qt is using double for qreal on this system. This is binary incompatible against Qt 5.1.
Configure with '-qreal float' to create a build that is binary compatible with 5.1.
