Qt5.1 on Rasberry Pi (full install not cross-compile)

RodriguesCunha

Hi postmako.

Did you had any luck on Qtcreator?
Mine first complainned about: unknown module: script.
I build and installed qtscript module. This error resolved.
Next try i got unknown module:declarative.
I build and installed qtdeclarative module and also qttools, but i still get unknown module: declarative.

As i can see it will be necessary to build and install some other modules...
The problem is that it's complainning about declarative but i already build and installed it...

Any ideas?

postmako

Sorry no, I need to learn more about this before getting any further as well.

RodriguesCunha

The only info i found on the web states that declarative module was renamed to quick, but this was on Qtcreator 2.6....

dawuss

[quote author="postmako" date="1375481184"]Just an FYI, if you don't manually make the changes to the configure script then it will not build PulseAudio, DBus, or some of the others.[/quote]

THX for the hint. Somehow changing the file manually did not work, using the patch file didn´t work either:

pi@raspberrypi ~/opt/qt5 $ patch -p0 < raspberry.patch
patch: **** Only garbage was found in the patch input.

Same when putting the patch file into the qtbase dir and calling patch there. I have no idea what the problem is.

It would be nice if the patch file could be downloaded and the right "patch" command would be given. I used patches on the linux kernel 1000 times, but seems I an unable to get this little thing working here. :-/

postmako

Click on my profile and send me your configure script, I'll try to see why yours is different.

RodriguesCunha

Hi postmako.
I still didn't managed to build Qtcreator.
After build and install qtquick1 module the declarative error was resolved. But now i get the same you had: designercomponents designer.

One other thing, is it possible when building an app, define it not to use opengl?

My problem is that i want to show my app (running on RPi) on my laptop (not on monitor), using x11vnc and tightvncviewer. I get the same screen as pi, but i can't get the hdmi output because of opengl.
Is there any way to do it, or should i build again Qt and in configure do not use -opengl es2?

Thanks

postmako

As far as I know adding the -opengl es2 to the configure is just telling Qt to configure opengl for ES2 not the desktop. It should not matter when it comes to building your apps. There is probably something wrong with your application.

Did you try building the sample apps in /home/pi/opt/qt5/qtbase/examples/ ?

RodriguesCunha

Hi,
I tried to build some examples, but i get the same.
On my laptop i get everything but the app.
When i plug the hdmi monitor, the app is showing.
So i don't know if the problem is on RPi or on Qt side...
I read that it's not possible to get same screen on monitor and laptop if it's using opengl.
Like i said, on RPi i'm using x11vnc and on laptop tightvncviewer.

If you want, i can send you my app code. But i think the problem it's not in my app. My app is working well in Ubuntu and on Windows 7.
One thing different is that in RPi, when i start app it's always fullscreen, but in the other OS it's not and so i get the buttons to maximize, minimize and close.

Thanks

postmako

Are you running the app in x-windows or from the terminal?

RodriguesCunha

From terminal, inside x-windows.

postmako

Maybe this is helpful: "http://qt-project.org/forums/viewthread/22903":http://qt-project.org/forums/viewthread/22903

It basically says "it will be fullscreen if you are using the eglfs QPA plugin"

Then I found this: "http://qt-project.org/forums/viewthread/10466":http://qt-project.org/forums/viewthread/10466

I noticed this in the qmake.conf file:
@QT_QPA_DEFAULT_PLATFORM = wayland@

So you could change that to xcb and rebuild or you could build and install wayland and get that to work. But when I typed ./app_name -platform xcb it worked in a window.

Interesting, I guess it is good to learn something new everyday...

Let me know what you end up doing, I'm still learning too.

postmako

I also came across these for wayland support: "http://wayland.freedesktop.org/raspberrypi.html":http://wayland.freedesktop.org/raspberrypi.html

Then build similar to these instructions: "http://qt-project.org/wiki/QtWayland":http://qt-project.org/wiki/QtWayland

@WLD=$HOME/Apps/Wayland # change this to another location if you prefer
LD_LIBRARY_PATH=$WLD/lib
PKG_CONFIG_PATH=$WLD/lib/pkgconfig/:$WLD/share/pkgconfig/
ACLOCAL="aclocal -I $WLD/share/aclocal"
PATH=$WLD/bin:$PATH
XDG_RUNTIME_DIR=/tmp

export WLD LD_LIBRARY_PATH PKG_CONFIG_PATH ACLOCAL PATH XDG_RUNTIME_DIR

git clone git://gitorious.org/qt/qtwayland.git
cd qtwayland
qmake
make
make install@

RodriguesCunha

Hi postmako
Using your suggestion ./app_name -platform xcb now i get the window and it works over vnc.
Thanks

geoffml

Hi,
At last I have found a link that actually works, thanks guys. I am running the cube example on my Pi. Now I want to run a working Qt5 Windows 32 bit app on my Pi. Has anybody done this yet with Qt5? As it is suggested, can I place all the associated files on my Pi and compile the .pro project and run qmake etc or is this too simplistic?
Just a few points to make compilation a little quicker. It took me 30 hours to compile

Reduce memory share to 16
Do not enable SSH
Overclocked at MEDIUM level only. Could be quicker if TURBO used.

Note to run the cube example return the memory share to at least 128 otherwise nothing happens on the screen. CTRL+ALT+BACKSPACE to exit.
Thanks

postmako

Yeah that should work, just run qmake and make. Let us know.

geoffml

Hi,
I have run into a few problems. I have a very basic Qt5.0.1 (32 bit) project using Qt Creator 2.6.2 on my PC, simply comprising of a mainwindow.h, main.cpp, mainwindow.cpp and mainwindow.ui. The form has a single text box. There is no code, I just wanted to see the form appear on my RPI. With the projec built and showing the form on my PC, I transferred the project .pro and all files mentioned above into the opt/qt5/examples/gui folder. I compiled it, ran qmake and make. This flagged up errors about closing braces. When looking at the above files in leaf pad, they contained ascii characters, and not code text. Since I cannot inspect the mainwindow.ui code I cannot determine if this is also corrupt.
I have also attempted to transfer .png and .bmp images from my PC to my RPI which are not recognised by either Gimp 2.8 or the image viewer.
Is this a Windows versus Linux problem? Can I use Qt4 to build my form and compile it under Qt5?
Thanks

postmako

Sounds like you transferred the files incorrectly from your PC to your Raspberry Pi. I would use WinSCP to transfer the files or use FileZilla but then use SFTP in binary mode.

How did you transfer your files?

geoffml

Hi postmako,
I used a USB stick from PC to RPI. Just downloaded WinSCP and I'll give it ago using SFTP protocol.

Thanks

postmako

Actually if you are using WinSCP you just use it as is. You only need to use SFTP with Filezilla. If you transferred it via USB stick then you shouldn't have any issues unless the encoding is incorrect. You may need to save them in UTF-8 format and make sure the Pi is set the same way, this shouldn't affect the binary files though so something else may be going on.

Do you have a website or some place where you could dump the files and some people here might be able to help you?

geoffml

Hi postmako,
Ha it was an encryption issue from PC to USB to RPI. Now I have my Qt5 app, developed on PC, running on RPI thanks to you. I can really make some progress now and plan to make a handheld RPI with touch screen.
I too have a full screen app but I guess this is an OpenGL thing. Any ideas would be welcome. Tried the ./app_name -platform xcb but no joy.
I don't have a web page but I'd be happy to share my working Qt5onPi.img, but even zipped it's over 3GB. Any suggestions such a Dropbox

Cheers