-qt-xcb failure

[The most recent future]

@jsulm
thanks , but I do not know those,
could you help find some URL LINK ?
谢谢!

[jsulm]

@The-most-recent-future How do you cross compile? Do you have a sysroot?

[The most recent future]

@jsulm
not sysroot, I do not known what is sysroot, wuwuwuwu.......... crying (),
my cross compile :
/usr/local/arm/gcc-linaro-arm-linux-gnueabihf-4.9-2014.09_linux/bin/xxxxxxxx-xx-x-xx

[jsulm]

@The-most-recent-future You need a sysroot if you want to cross compile.
A sysroot is basically the file system of your target device. It is needed to find the header files and libraries for the target.
You should read https://wiki.qt.io/RaspberryPi_Beginners_Guide

[The most recent future]

@jsulm
thanks ， a very nice topic ！
but ,

Look complicated
now,

I just want to install X11, so that the errors of -qt-xcb disappear

[The most recent future]

@jsulm
Requires libxcb >= 1.5.

PACKAGE DEPENDENCIES

Required packages:
libxcb1 libxcb1-dev libx11-xcb1 libx11-xcb-dev libxcb-keysyms1 libxcb-keysyms1-dev libxcb-image0 libxcb-image0-dev libxcb-shm0 libxcb-shm0-dev libxcb-icccm1 libxcb-icccm1-dev libxcb-sync0 libxcb-sync0-dev libxcb-render-util0 libxcb-render-util0-dev libxcb-xfixes0-dev libxrender-dev libxcb-shape0-dev libxcb-randr0-dev libxcb-glx0-dev

On Ubuntu 11.10 icccm1 is replaced by icccm4 and xcb-render-util is not available:
libxcb1 libxcb1-dev libx11-xcb1 libx11-xcb-dev libxcb-keysyms1 libxcb-keysyms1-dev libxcb-image0 libxcb-image0-dev libxcb-shm0 libxcb-shm0-dev libxcb-icccm4 libxcb-icccm4-dev libxcb-sync0 libxcb-sync0-dev libxcb-xfixes0-dev libxrender-dev libxcb-shape0-dev libxcb-randr0-dev libxcb-glx0-dev
The packages for xcb-render-util can be installed manually from http://packages.ubuntu.com/natty/libxcb-render-util0 and http://packages.ubuntu.com/natty/libxcb-render-util0-dev

On Ubuntu 12.04 icccm1 is replaced by icccm4 and xcb-render-util can be installed automatically:
libxcb1 libxcb1-dev libx11-xcb1 libx11-xcb-dev libxcb-keysyms1 libxcb-keysyms1-dev libxcb-image0 libxcb-image0-dev libxcb-shm0 libxcb-shm0-dev libxcb-icccm4 libxcb-icccm4-dev libxcb-sync0 libxcb-sync0-dev libxcb-xfixes0-dev libxrender-dev libxcb-shape0-dev libxcb-randr0-dev libxcb-render-util0 libxcb-render-util0-dev libxcb-glx0-dev

I have all these libraries installed, why also wrong. ???

[jsulm]

@The-most-recent-future AGAIN: you are cross compiling! That means: you need that X11 stuff for your TARGET DEVICE not your development PC! It doesn't matter what you installed on your PC. What you install on your PC cannot be used on your target device (logical isn't it?). That's why I said you should read that link. You need to learn how cross compilation works if you want to cross compile, else you will not succeed.
One of the basic techniques for cross compilation is the sysroot, which contains all needed header files and libraries for the target device.

[jsulm]

@The-most-recent-future What is your target device?

[The most recent future]

@jsulm

, touchscreen . a touchscreen , arm board. samsung soc.

[jsulm]

@The-most-recent-future You need to get a sysroot for it. How, depends on the provider of your device.

[SGaist]

Hi,

As alternative, you can use Qt's bundled xcb. Pass the -qt-xcb parameter to your configure call.

[The most recent future]

@jsulm
thanks ！

QT document is say install xcb， xcb is the same for x 11 ?

[The most recent future]

@SGaist

owowwo ! ~~how to do ? how to do?~~

[The most recent future]

@SGaist
how to do ? please help me , thanks

[SGaist]

Did you pass the option like I suggested ?

[The most recent future]

@SGaist
cryying crying ......
I do not known how to option for you suggested.
please help me .

[SGaist]

path_to_Qt_sources/configure -qt-xcb

[The most recent future]

@SGaist
i do not known ,
path_to_Qt_sources : this is a fnction ? macro ?

[SGaist]

Neither, it's a placeholder that you should replace by the actual path to your Qt sources.

Since you are already building Qt, just do the same as before but replace your -xcb parameter with -qt-xcb.

[The most recent future]

@SGaist
I do not known,
Save me once again ！ 3Q