Cross compile dont gen QLabel and QPushbutton and Fontconfig pre-condition

[SGaist]

Good question that requires that you provide more information like warning/error messages your application is generating. Type of backend used to start your application etc.

[CrazyCreepy]

@SGaist this i why i'm so confused and i call help... they doesn't have any warnning or error.

[SGaist]

Again, what backend are you using on the Pi ?

[CrazyCreepy]

Ok sorry guys , maybe it's my poor english but what do you exactly mean by backend ?

[SGaist]

Are you using xcb, LinuxFB, EGLFS, other ?

[CrazyCreepy]

How I can verify which one i use?

[SGaist]

What parameters are passed to your application when you start it ?

You can start your application with the QT_DEBUG_PLUGINS environment variable set to 1 so you can see what plugins are loaded.

[CrazyCreepy]

i think i passed no parameter i just write in my console "sudo ./Test5".
so you tell me to do write "sudo ./Test 5 QT_DEBUG_PLUGINS=1" or i need to add QT_DEBUG_PLUGINS and set value at 1 in build environment of qt creator.

[jsulm]

@CrazyCreepy Why sudo?
What @SGaist means is:

QT_DEBUG_PLUGINS=1
./Test

[CrazyCreepy]

if you are not root you need to add sudo :P tanks i try this

[CrazyCreepy]

Well i try to do that, but nothing it's happenning...

[SGaist]

Either it's:

export QT_DEBUG_PLUGINS=1
./Test

or

QT_DEBUG_PLUGINS=1 ./Test

[CrazyCreepy]

export QT_DEBUG_PLUGINS=1 it's work and the result is ```
QFactoryLoader::QFactoryLoader() checking directory path "/usr/local/qt5/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() looking at "/usr/local/qt5/plugins/platforms/libqeglfs.so"
Found metadata in lib /usr/local/qt5/plugins/platforms/libqeglfs.so, metadata=
{
"IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
"MetaData": {
"Keys": [
"eglfs"
]
},
"className": "QEglFSIntegrationPlugin",
"debug": false,
"version": 329728
}

Got keys from plugin meta data ("eglfs")
QFactoryLoader::QFactoryLoader() looking at "/usr/local/qt5/plugins/platforms/libqlinuxfb.so"
Found metadata in lib /usr/local/qt5/plugins/platforms/libqlinuxfb.so, metadata=
{
"IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
"MetaData": {
"Keys": [
"linuxfb"
]
},
"className": "QLinuxFbIntegrationPlugin",
"debug": false,
"version": 329728
}

Got keys from plugin meta data ("linuxfb")

[SGaist]

It looks incomplete

[CrazyCreepy]

they have other plugin but i didn't take it because i tougth that two plugin it's necessary to know if i use xcb,linuxFB or EGLFS or other. All other plugin seemeds to Qt object... Do you want the complete result or i need to check some specific plugin?

[SGaist]

You should check for the entries that start with loaded library, you'll have the information you seek.

[jsulm]

@CrazyCreepy said in Cross compile dont gen QLabel and QPushbutton and Fontconfig pre-condition:

if you are not root you need to add sudo :P tanks i try this

Sure. But the question was: why do you need to start your app as root?

[CrazyCreepy]

thats all of load library i have found.

loaded library "/usr/local/qt5/plugins/platforms/libqeglfs.so"
loaded library "/usr/local/qt5/plugins/egldeviceintegrations/libqeglfs-brcm-integration.so"
loaded library "/usr/local/qt5/plugins/imageformats/libqgif.so"
loaded library "/usr/local/qt5/plugins/imageformats/libqicns.so"
loaded library "/usr/local/qt5/plugins/imageformats/libqico.so"
loaded library "/usr/local/qt5/plugins/imageformats/libqjpeg.so"
loaded library "/usr/local/qt5/plugins/imageformats/libqsvg.so"
loaded library "/usr/local/qt5/plugins/imageformats/libqtga.so"
loaded library "/usr/local/qt5/plugins/imageformats/libqtiff.so"
loaded library "/usr/local/qt5/plugins/imageformats/libqwbmp.so"
loaded library "/usr/local/qt5/plugins/imageformats/libqwebp.so"

so with this it's seem i use the eglfs backend. Now i can't tell if it's normal or not...

and jslum in ancien projet on a raspberry pi i always need to need to be root to start a application ... so i tought it's always like this but it seems that isn't necessary.

[SGaist]

Ok, so it means no window manager.

Can you post an image of what you are getting exactly on screen when running your application ?

[CrazyCreepy]

@SGaist this is what i get on my screen: