Installation QT 5.11 on Raspberry Pi 3

mranger90

@gogoer said in Installation QT 5.11 on Raspberry Pi 3:

g++: internal compiler error: Segmentation fault (program cc1plus)

That might be an out of memory error. I used to see that when I tried to build Qt in a VM that was not given enough memory.

gogoer

@sierdzio said in Installation QT 5.11 on Raspberry Pi 3:

Also, as @sneubert suggests, cross compilation will allow you to build much, much faster.

maybe you can give link to manual, how crosscompile QT from windows? i have not linux machine now.
i found only manuals to crosscompile from linux.

sierdzio

@gogoer said in Installation QT 5.11 on Raspberry Pi 3:

maybe you can give link to manual, how crosscompile QT from windows?

You like making things harder for yourself, right? ;-) There is this guide but it's known to work for a very limited range of Qt versions only.

A much better option is to set up some Linux OS (in a virtual machine or as dual boot on your PC) and cross compile via Linux. It's really much easier to do (which does not mean it is easy...). Installing a Linux distro like Ubuntu takes 20 minutes.

gogoer

@sierdzio said in Installation QT 5.11 on Raspberry Pi 3:

A much better option is to set up some Linux OS (in a virtual machine or as dual boot on your PC) and cross compile via Linux. It's really much easier to do (which does not mean it is easy...). Installing a Linux distro like Ubuntu takes 20 minutes.

ok, i'll make so))) if have problems (99%) i'll ask here or create new topic?

sierdzio

As you prefer, I don't mind.

gogoer

I installed Ubuntu 18.04 in VirtualBox and now trying to install QT, following this:
http://doc.qt.io/QtForDeviceCreation/qtee-preparing-hardware-rasberrypi.html
I downloaded online installer, but i cant find QT for Device Creation. Only QT 5.11.2 and modules.
Can I install all i need via online installer?

gogoer

i compile QT in Ubuntu and have error:

arm-linux-gnueabihf-g++ -mfloat-abi=hard --sysroot=/opt/qt5pi/sysroot -Wl,-O1 -Wl,-rpath-link,/opt/qt5pi/sysroot/opt/vc/lib -Wl,-rpath-link,/opt/qt5pi/sysroot/usr/lib/arm-linux-gnueabihf -Wl,-rpath-link,/opt/qt5pi/sysroot/lib/arm-linux-gnueabihf -o verifyspec verifyspec.o
/opt/qt5pi/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian-x64/bin/../lib/gcc/arm-linux-gnueabihf/4.8.3/../../../../arm-linux-gnueabihf/bin/ld: cannot find crt1.o: Нет такого файла или каталога
/opt/qt5pi/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian-x64/bin/../lib/gcc/arm-linux-gnueabihf/4.8.3/../../../../arm-linux-gnueabihf/bin/ld: cannot find crti.o: Нет такого файла или каталога
/opt/qt5pi/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian-x64/bin/../lib/gcc/arm-linux-gnueabihf/4.8.3/../../../../arm-linux-gnueabihf/bin/ld: cannot find -lm

what can i do?

ambershark

@gogoer said in Installation QT 5.11 on Raspberry Pi 3:

it gives

g++: internal compiler error: Segmentation fault (program cc1plus) 
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-4.9/README.Bugs> for instructions.

and after gives error i write upper.

More than likely you ran out of memory. That's when I see internal compiler errors. You can make g++ use less memory by not using -pipe which will write intermediate stuff to disk rather than piping it to the next process.

Like others have said you're much better off cross compiling on a good system, but if you want to continue you just need to lower g++'s memory consumption. The easiest way to do that is not allowing piping.

Edit: I replied before I saw @mranger90's post... he's absolutely right, that's exactly what popped into my head too. ;)

ambershark

@gogoer said in Installation QT 5.11 on Raspberry Pi 3:

@sierdzio said in Installation QT 5.11 on Raspberry Pi 3:

A much better option is to set up some Linux OS (in a virtual machine or as dual boot on your PC) and cross compile via Linux. It's really much easier to do (which does not mean it is easy...). Installing a Linux distro like Ubuntu takes 20 minutes.

ok, i'll make so))) if have problems (99%) i'll ask here or create new topic?

Definitely get at least a linux vm... using windows for anything other than playing video games is so 1990s ;)

Windows lost the OS wars about a decade ago and is very far behind posix OSes now.

ambershark

@gogoer said in Installation QT 5.11 on Raspberry Pi 3:

i compile QT in Ubuntu and have error:

arm-linux-gnueabihf-g++ -mfloat-abi=hard --sysroot=/opt/qt5pi/sysroot -Wl,-O1 -Wl,-rpath-link,/opt/qt5pi/sysroot/opt/vc/lib -Wl,-rpath-link,/opt/qt5pi/sysroot/usr/lib/arm-linux-gnueabihf -Wl,-rpath-link,/opt/qt5pi/sysroot/lib/arm-linux-gnueabihf -o verifyspec verifyspec.o
/opt/qt5pi/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian-x64/bin/../lib/gcc/arm-linux-gnueabihf/4.8.3/../../../../arm-linux-gnueabihf/bin/ld: cannot find crt1.o: Нет такого файла или каталога
/opt/qt5pi/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian-x64/bin/../lib/gcc/arm-linux-gnueabihf/4.8.3/../../../../arm-linux-gnueabihf/bin/ld: cannot find crti.o: Нет такого файла или каталога
/opt/qt5pi/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian-x64/bin/../lib/gcc/arm-linux-gnueabihf/4.8.3/../../../../arm-linux-gnueabihf/bin/ld: cannot find -lm

what can i do?

These errors are because of your sysroot. They come from not having glibc (or whatever libc you use) in the target architecture. Those should be in your sysroot directory.

What is in /opt/qt5pi/sysroot? Is that a valid directory? What's the output of find /opt/qt5pi/sysroot ?

gogoer

i correct sysroot problem, thank you.

i deleted folders except listed upper.

then i configure with:

../qt-everywhere-src-5.11.2/configure -opengl es2 -device linux-rasp-pi3-g++ -device-option CROSS_COMPILE=arm-linux-gnueabihf- -sysroot /opt/qt5pi/sysroot -prefix /usr/local/qt5pi -opensource -confirm-license -skip qtscript -nomake examples -nomake tests -make libs -pkg-config -no-use-gold-linker -v

and its configured without errors, just some notes.

during compilation have errors:

/opt/qt5pi/qt-everywhere-src-5.11.2/qtbase/src/plugins/platforms/eglfs/deviceintegration/eglfs_kms/qeglfskmsgbmwindow.cpp: В функции-члене «virtual void QEglFSKmsGbmWindow::resetSurface()»:
/opt/qt5pi/qt-everywhere-src-5.11.2/qtbase/src/plugins/platforms/eglfs/deviceintegration/eglfs_kms/qeglfskmsgbmwindow.cpp:58:5: ошибка: нет декларации «PFNEGLCREATEPLATFORMWINDOWSURFACEEXTPROC» в этой области видимости
     PFNEGLCREATEPLATFORMWINDOWSURFACEEXTPROC createPlatformWindowSurface = nullptr;
     ^
/opt/qt5pi/qt-everywhere-src-5.11.2/qtbase/src/plugins/platforms/eglfs/deviceintegration/eglfs_kms/qeglfskmsgbmwindow.cpp:58:46: ошибка: expected «;» before «createPlatformWindowSurface»
     PFNEGLCREATEPLATFORMWINDOWSURFACEEXTPROC createPlatformWindowSurface = nullptr;
                                              ^
/opt/qt5pi/qt-everywhere-src-5.11.2/qtbase/src/plugins/platforms/eglfs/deviceintegration/eglfs_kms/qeglfskmsgbmwindow.cpp:61:9: ошибка: нет декларации «createPlatformWindowSurface» в этой области видимости
         createPlatformWindowSurface = reinterpret_cast<PFNEGLCREATEPLATFORMWINDOWSURFACEEXTPROC>(
         ^
/opt/qt5pi/qt-everywhere-src-5.11.2/qtbase/src/plugins/platforms/eglfs/deviceintegration/eglfs_kms/qeglfskmsgbmwindow.cpp:61:56: ошибка: expected type-specifier before «PFNEGLCREATEPLATFORMWINDOWSURFACEEXTPROC»
         createPlatformWindowSurface = reinterpret_cast<PFNEGLCREATEPLATFORMWINDOWSURFACEEXTPROC>(
                                                        ^
/opt/qt5pi/qt-everywhere-src-5.11.2/qtbase/src/plugins/platforms/eglfs/deviceintegration/eglfs_kms/qeglfskmsgbmwindow.cpp:61:56: ошибка: expected «>» before «PFNEGLCREATEPLATFORMWINDOWSURFACEEXTPROC»
/opt/qt5pi/qt-everywhere-src-5.11.2/qtbase/src/plugins/platforms/eglfs/deviceintegration/eglfs_kms/qeglfskmsgbmwindow.cpp:61:56: ошибка: expected «(» before «PFNEGLCREATEPLATFORMWINDOWSURFACEEXTPROC»
/opt/qt5pi/qt-everywhere-src-5.11.2/qtbase/src/plugins/platforms/eglfs/deviceintegration/eglfs_kms/qeglfskmsgbmwindow.cpp:62:68: ошибка: expected «)» before «;» token
             eglGetProcAddress("eglCreatePlatformWindowSurfaceEXT"));
                                                                    ^
/opt/qt5pi/qt-everywhere-src-5.11.2/qtbase/src/plugins/platforms/eglfs/deviceintegration/eglfs_kms/qeglfskmsgbmwindow.cpp:65:9: ошибка: нет декларации «createPlatformWindowSurface» в этой области видимости
     if (createPlatformWindowSurface) {
         ^
Makefile:2877: recipe for target '.obj/qeglfskmsgbmwindow.o' failed
make[7]: *** [.obj/qeglfskmsgbmwindow.o] Error 1
make[7]: *** Ожидание завершения заданий…
make[7]: выход из каталога «/opt/qt5pi/qt5build/qtbase/src/plugins/platforms/eglfs/deviceintegration/eglfs_kms»
Makefile:72: recipe for target 'sub-eglfs_kms-make_first' failed
make[6]: *** [sub-eglfs_kms-make_first] Error 2
make[6]: выход из каталога «/opt/qt5pi/qt5build/qtbase/src/plugins/platforms/eglfs/deviceintegration»
Makefile:104: recipe for target 'sub-deviceintegration-make_first-ordered' failed
make[5]: *** [sub-deviceintegration-make_first-ordered] Error 2
make[5]: выход из каталога «/opt/qt5pi/qt5build/qtbase/src/plugins/platforms/eglfs»
Makefile:125: recipe for target 'sub-eglfs-make_first' failed
make[4]: *** [sub-eglfs-make_first] Error 2
make[4]: выход из каталога «/opt/qt5pi/qt5build/qtbase/src/plugins/platforms»
Makefile:102: recipe for target 'sub-platforms-make_first' failed
make[3]: *** [sub-platforms-make_first] Error 2
make[3]: выход из каталога «/opt/qt5pi/qt5build/qtbase/src/plugins»
Makefile:776: recipe for target 'sub-plugins-make_first' failed
make[2]: *** [sub-plugins-make_first] Error 2
make[2]: выход из каталога «/opt/qt5pi/qt5build/qtbase/src»
Makefile:48: recipe for target 'sub-src-make_first' failed
make[1]: *** [sub-src-make_first] Error 2
make[1]: выход из каталога «/opt/qt5pi/qt5build/qtbase»
Makefile:52: recipe for target 'module-qtbase-make_first' failed
make: *** [module-qtbase-make_first] Error 2

what it can be?

sierdzio

Oh, I remember stumbling upon that error myself, but I don't remember how I resolved it myself (possibly by switching OpenGL driver in pi-config and updating sysroot).

These might help:

gogoer

thank your all!!! i compiled and builed qt 5.10.1. I tryed build 5.11.2, but have errors. I think 5.10.1 is enough.
I installed QTCreator and configured it. But when i compile project, i have error:

sys/cdefs.h: no such file or directory

file cdefs.h is in /usr/include/sys/cdefs.h, ichecked it.
i do:

export Path=$PATH:/usr/include

but i have same error still building project in QTCreator.
what i need to do to solve this?

sierdzio

Have you followed the guide for setting up Qt Creator for use with RPi? https://wiki.qt.io/RaspberryPi2EGLFS#Qt_Creator

gogoer

yes i do.
but at Kit screen i have error: compiler "RaspGCC" (x86-linux-generic-elf-64bit) cant create code for QT profile "Q5.10.1 (qt5pi)" (arm-linux-generic-elf-32bit).

sierdzio

@gogoer said in Installation QT 5.11 on Raspberry Pi 3:

yes i do.
but at Kit screen i have error: compiler "RaspGCC" (x86-linux-generic-elf-64bit) cant create code for QT profile "Q5.10.1 (qt5pi)" (arm-linux-generic-elf-32bit).

Hm, unless you misconfigured the RaspGCC compiler (see in "compilers" tab), it should work. If you're using Qt creator 4.7, try with 4.6. I've seen similar issues on Android with newest QtC, perhaps it's just IDE bug.

gogoer

i configured everythin by manual one more time, now when i create empty qtquick project in qtcreator and try to build it, i have in console output:

cannot run target compiler 'arm-linux-gnueabihf-g++'

jsulm

@gogoer Please show you compiler configuration in "Compiler" tab.

gogoer

here it:
0_1542052879388_Снимок экрана от 2018-11-12 10-27-23.png

jsulm

@gogoer If you copy/past the path to compiler into a terminal: does it start/run?

gogoer

yes, in terminal this path works good!

gogoer

maybe i need to use another compiler? why this dont work?

gogoer

here is the output:

16:24:47: Выполняются этапы для проекта 111...
16:24:47: Запускается: «/opt/qt5pi/sysroot/usr/local/qt5pi/bin/qmake» /home/pasha/111/111.pro -spec devices/linux-rasp-pi3-g++ CONFIG+=debug CONFIG+=qml_debug
Project ERROR: Cannot run target compiler 'arm-linux-gnueabihf-g++'. Output:
===================
Using built-in specs.
COLLECT_GCC=arm-linux-gnueabihf-g++
Target: arm-linux-gnueabihf
Configured with: /cbuild/slaves/oorts/crosstool-ng/builds/arm-linux-gnueabihf-raspbian-linux/.build/src/gcc-linaro-4.8-2014.01/configure --build=i686-build_pc-linux-gnu --host=i686-build_pc-linux-gnu --target=arm-linux-gnueabihf --prefix=/cbuild/slaves/oorts/crosstool-ng/builds/arm-linux-gnueabihf-raspbian-linux/install --with-sysroot=/cbuild/slaves/oorts/crosstool-ng/builds/arm-linux-gnueabihf-raspbian-linux/install/arm-linux-gnueabihf/libc --enable-languages=c,c++,fortran --disable-multilib --enable-multiarch --with-arch=armv6 --with-tune=arm1176jz-s --with-fpu=vfp --with-float=hard --with-pkgversion='crosstool-NG linaro-1.13.1-4.8-2014.01 - Linaro GCC 2013.11' --with-bugurl=https://bugs.launchpad.net/gcc-linaro --enable-__cxa_atexit --enable-libmudflap --enable-libgomp --enable-libssp --with-gmp=/cbuild/slaves/oorts/crosstool-ng/builds/arm-linux-gnueabihf-raspbian-linux/.build/arm-linux-gnueabihf/build/static --with-mpfr=/cbuild/slaves/oorts/crosstool-ng/builds/arm-linux-gnueabihf-raspbian-linux/.build/arm-linux-gnueabihf/build/static --with-mpc=/cbuild/slaves/oorts/crosstool-ng/builds/arm-linux-gnueabihf-raspbian-linux/.build/arm-linux-gnueabihf/build/static --with-isl=/cbuild/slaves/oorts/crosstool-ng/builds/arm-linux-gnueabihf-raspbian-linux/.build/arm-linux-gnueabihf/build/static --with-cloog=/cbuild/slaves/oorts/crosstool-ng/builds/arm-linux-gnueabihf-raspbian-linux/.build/arm-linux-gnueabihf/build/static --with-libelf=/cbuild/slaves/oorts/crosstool-ng/builds/arm-linux-gnueabihf-raspbian-linux/.build/arm-linux-gnueabihf/build/static --enable-threads=posix --disable-libstdcxx-pch --enable-linker-build-id --enable-plugin --enable-gold --with-local-prefix=/cbuild/slaves/oorts/crosstool-ng/builds/arm-linux-gnueabihf-raspbian-linux/install/arm-linux-gnueabihf/libc --enable-c99 --enable-long-long --with-float=hard
Thread model: posix
gcc version 4.8.3 20140106 (prerelease) (crosstool-NG linaro-1.13.1-4.8-2014.01 - Linaro GCC 2013.11) 
COLLECT_GCC_OPTIONS='-march=armv8-a' '-mtune=cortex-a53' '-mfpu=crypto-neon-fp-armv8' '-mfloat-abi=hard' '-E' '-v' '-shared-libgcc' '-mtls-dialect=gnu'
 /opt/qt5pi/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian/bin/../libexec/gcc/arm-linux-gnueabihf/4.8.3/cc1plus -E -quiet -v -imultilib . -imultiarch arm-linux-gnueabihf -iprefix /opt/qt5pi/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian/bin/../lib/gcc/arm-linux-gnueabihf/4.8.3/ -isysroot /opt/qt5pi/sysroot -D_GNU_SOURCE - -march=armv8-a -mtune=cortex-a53 -mfpu=crypto-neon-fp-armv8 -mfloat-abi=hard -mtls-dialect=gnu
/opt/qt5pi/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian/bin/../libexec/gcc/arm-linux-gnueabihf/4.8.3/cc1plus: error while loading shared libraries: libz.so.1: cannot open shared object file: No such file or directory
===================
Maybe you forgot to setup the environment?
16:24:47: Процесс «/opt/qt5pi/sysroot/usr/local/qt5pi/bin/qmake» завершился с кодом 3.
Ошибка при сборке/установке проекта 111 (комплект: Raspberry)
Во время выполнения этапа «qmake»
16:24:47: Прошло времени: 00:00.

my path to qmake: ```
/opt/qt5pi/sysroot/usr/local/qt5pi/bin/qmake

is it ok?

jsulm

@gogoer said in Installation QT 5.11 on Raspberry Pi 3:

libz.so.1: cannot open shared object file: No such file or directory

Where is your sysroot and does it contain libz.so.1?

gogoer

thank you!!!!
i make:

sudo apt-get install zlib1g:i386

and it go on!!

gogoer

I compiled my project and copy executable file to RPI.
But when I execute it, i have error

*failed to add service - already in use?

it crashes on function

QGuiApplication app(argc, argv);

and one more question: i create and install qt5.10 on ubuntu, what i need to do to update qt version on RPI? as i understand it still uses old version.

jsulm

@gogoer I don't know what "service" is mentioned in the error.
"install qt5.10 on ubuntu, what i need to do to update qt version on RPI" - do you mean you cross-compiled Qt 5.10 on your Ubuntu machine? If so you can copy the libs to the same location or RPi you defined using -prefix parameter.

gogoer

yes, i cross-compile on ubuntu. what directory i need to copy to RPI? and what is -prefix parameter?

gogoer

i created blank QTQuick application and compile it.
when i start it on RPI have error:

QML debugging is enabled. Only use this in a safe environment.
* failed to add service - already in use?

one more question:
where i can configure path to copy on RPI? now after pressing Run button executable file copies to /opt/ directory on ubuntu. i want to change it, but cant find where to do this.

jsulm

@gogoer Come on, you're already using -prefix parameter:
"../qt-everywhere-src-5.11.2/configure -v -opengl es2 -eglfs -no-gtk -device linux-rasp-pi-g++
-opensource -confirm-license -reduce-exports
-force-pkg-config -nomake examples -no-compile-examples -release
-qt-pcre -ssl -evdev -system-freetype -fontconfig -glib -prefix /opt/qt5"

So, you should copy Qt to /opt/qt5

gogoer

i compiled all by this manual: http://ulasdikme.com/projects/raspberry/Qt_for_raspberrypi.php
i used:

../qt-everywhere-src-5.10.1/configure -opengl es2 -device linux-rasp-pi3-g++ -device-option CROSS_COMPILE=arm-linux-gnueabihf- -sysroot /opt/qt5pi/sysroot -prefix /usr/local/qt5pi -opensource -confirm-license -skip qtscript -nomake examples -make libs -pkg-config -no-use-gold-linker -v

i have qt libs on /usr/local/qt5pi on my RPI.

if i compile project on PRI natively and run it works.
but if i compile same project on ubuntu and copy executable file to RPI it gives error:

* failed to add service - already in use?

maybe i need to copy something else?

ambershark

@gogoer What service is it talking about? What is your application actually trying to do? Maybe cut it down to a helloworld app to test with and make sure Qt is working properly. Or at least add logging to your application so you can see at what point it comes up with that error.

Also you can try running strace on your exe to see what it is trying to do when it fails. Sometimes that will give you some insight.

I've never seen that error from Qt. And I've used it for like 18 years now.

Edit: Ah this makes sense now ... it's a Pi thing.

https://www.raspberrypi.org/forums/viewtopic.php?t=12581

That's an old topic but it should give you some ideas.. Seems to have to do with memory.

gogoer

@ambershark said in Installation QT 5.11 on Raspberry Pi 3:

What service is it talking about? What is your application actually trying to do? Maybe cut it down to a helloworld app to test with and make sure Qt is working properly.

I created a blank QTQuick project with only HelloWorld window and it gives such error, when i start it. Error crashes on

QGuiApplication app(argc, argv);

function.

But if i create or compile project on RPI (it uses QT5.3 and QTCreator1.2.3) everything works well.

ambershark

What does ldd <yourexe> show (the exe you loaded on the Pi)? I wonder if you're missing a library or it's mixing Qt versions on the Pi and the ones you loaded.

gogoer

pi@raspberrypi:/opt/untitled/bin $ ./untitled 
QML debugging is enabled. Only use this in a safe environment.
* failed to add service - already in use?
pi@raspberrypi:/opt/untitled/bin $ ldd untitled 
	linux-vdso.so.1 (0x7ee46000)
	/usr/lib/arm-linux-gnueabihf/libarmmem.so (0x76f45000)
	libQt5Quick.so.5 => /usr/local/qt5pi/lib/libQt5Quick.so.5 (0x76bbb000)
	libQt5Gui.so.5 => /usr/local/qt5pi/lib/libQt5Gui.so.5 (0x76706000)
	libQt5Qml.so.5 => /usr/local/qt5pi/lib/libQt5Qml.so.5 (0x7636e000)
	libQt5Network.so.5 => /usr/local/qt5pi/lib/libQt5Network.so.5 (0x76200000)
	libQt5Core.so.5 => /usr/local/qt5pi/lib/libQt5Core.so.5 (0x75cb6000)
	libGLESv2.so => /opt/vc/lib/libGLESv2.so (0x75c74000)
	libpthread.so.0 => /lib/arm-linux-gnueabihf/libpthread.so.0 (0x75c4c000)
	libstdc++.so.6 => /usr/lib/arm-linux-gnueabihf/libstdc++.so.6 (0x75b70000)
	libm.so.6 => /lib/arm-linux-gnueabihf/libm.so.6 (0x75af5000)
	libgcc_s.so.1 => /lib/arm-linux-gnueabihf/libgcc_s.so.1 (0x75ac8000)
	libc.so.6 => /lib/arm-linux-gnueabihf/libc.so.6 (0x75987000)
	libpng12.so.0 => /lib/arm-linux-gnueabihf/libpng12.so.0 (0x75957000)
	libz.so.1 => /lib/arm-linux-gnueabihf/libz.so.1 (0x75930000)
	librt.so.1 => /lib/arm-linux-gnueabihf/librt.so.1 (0x75919000)
	libdl.so.2 => /lib/arm-linux-gnueabihf/libdl.so.2 (0x75906000)
	libgthread-2.0.so.0 => /usr/lib/arm-linux-gnueabihf/libgthread-2.0.so.0 (0x758f4000)
	libglib-2.0.so.0 => /lib/arm-linux-gnueabihf/libglib-2.0.so.0 (0x757f1000)
	/lib/ld-linux-armhf.so.3 (0x76f5a000)
	libEGL.so => /opt/vc/lib/libEGL.so (0x757b8000)
	libbcm_host.so => /opt/vc/lib/libbcm_host.so (0x75791000)
	libvchiq_arm.so => /opt/vc/lib/libvchiq_arm.so (0x7577b000)
	libvcos.so => /opt/vc/lib/libvcos.so (0x75761000)
	libpcre.so.3 => /lib/arm-linux-gnueabihf/libpcre.so.3 (0x756ee000)

ambershark

@gogoer All that looks ok. Figured you would have mixed libraries. You can dig deeper by running ldd on each Qt lib but I don't think it will show what i was expecting.

Can you run it in a gdb and dig into the part of the code that is causing that failure? I know you said it was in QApplication but can you provide any more information? If not I don't have any more ideas ... it seems like it was compiled or installed incorrectly on the Pi but I don't know why.

gogoer

thank you very much for help.
i reinstalled ubuntu and Raspbian and everything compiles well.
now when i try to start application on RPI i have next error:

Unable to query physical screen size, defaulting to 100 dpi.
To override, set QT_QPA_EGLFS_PHYSICAL_WIDTH and QT_QPA_EGLFS_PHYSICAL_HEIGHT (in millimeters).
QQmlApplicationEngine failed to load component
qrc:/main.qml:1 module "QtQuick" is not installed
qrc:/main.qml:2 module "QtQuick.Controls" is not installed
qrc:/main.qml:1 module "QtQuick" is not installed
qrc:/main.qml:2 module "QtQuick.Controls" is not installed

i inderstand that it cant find some libs but dont know where to fix this.

gogoer

i want to use Gauge control, so i write in main.qml:

import QtQuick 2.11
import QtQuick.Window 2.1
import QtQuick.Controls 2.4

i installed QT 5.11.

i checked folder /usr/local/qt5pi/qml/QtQuick.2
and ith have only 3 files, no folders with controls. is it normal?

gogoer

i created blank QTQuick application in QTQreator, it compiles good, but when run it gives errors (see upper).
i check it with ldd:

pi@raspberrypi:~/t3/bin $ ldd t3 
	linux-vdso.so.1 (0x7eddf000)
	/usr/lib/arm-linux-gnueabihf/libarmmem.so (0x76ef5000)
	libQt5Quick.so.5 => /usr/local/qt5pi/lib/libQt5Quick.so.5 (0x76c19000)
	libQt5Gui.so.5 => /usr/local/qt5pi/lib/libQt5Gui.so.5 (0x7685a000)
	libQt5Qml.so.5 => /usr/local/qt5pi/lib/libQt5Qml.so.5 (0x765e9000)
	libQt5Network.so.5 => /usr/local/qt5pi/lib/libQt5Network.so.5 (0x76510000)
	libQt5Core.so.5 => /usr/local/qt5pi/lib/libQt5Core.so.5 (0x760b4000)
	libGLESv2.so => /opt/vc/lib/libGLESv2.so (0x7608f000)
	libpthread.so.0 => /lib/arm-linux-gnueabihf/libpthread.so.0 (0x76066000)
	libstdc++.so.6 => /usr/lib/arm-linux-gnueabihf/libstdc++.so.6 (0x75f1e000)
	libgcc_s.so.1 => /lib/arm-linux-gnueabihf/libgcc_s.so.1 (0x75ef1000)
	libc.so.6 => /lib/arm-linux-gnueabihf/libc.so.6 (0x75db2000)
	libm.so.6 => /lib/arm-linux-gnueabihf/libm.so.6 (0x75d33000)
	libpng16.so.16 => /usr/lib/arm-linux-gnueabihf/libpng16.so.16 (0x75cf9000)
	libz.so.1 => /lib/arm-linux-gnueabihf/libz.so.1 (0x75cd2000)
	librt.so.1 => /lib/arm-linux-gnueabihf/librt.so.1 (0x75cbb000)
	libdl.so.2 => /lib/arm-linux-gnueabihf/libdl.so.2 (0x75ca8000)
	/lib/ld-linux-armhf.so.3 (0x76f0b000)
	libEGL.so => /opt/vc/lib/libEGL.so (0x75c6f000)
	libbcm_host.so => /opt/vc/lib/libbcm_host.so (0x75c48000)
	libvchiq_arm.so => /opt/vc/lib/libvchiq_arm.so (0x75c32000)
	libvcos.so => /opt/vc/lib/libvcos.so (0x75c18000)

i checked /usr/local/qt5pi/lib/libQt5Quick.so.5 path, it is ok.
what can be wrong?

ambershark

@gogoer Sorry for the delay, I haven't had time to answer questions on the forums lately..

Anyway, 3 files in that folder is normal.

What happens if you just try to run qmlscene on the command line on the RPI? It sounds like it can't find your install of Qt. Do you have a QTDIR environment variable set? Is Qt's bin directory in your path?

For example my shell looks like:

$ export | grep -i qt
declare -x PATH="/home/mike/bin:/usr/local/Qt/bin:/home/mike/bin:/usr/local/Qt/bin:/usr/local/sbin:/usr/local/bin:/usr/bin:/usr/lib/jvm/default/bin:/usr/bin/site_perl:/usr/bin/vendor_perl:/usr/bin/core_perl:/usr/local/bin:~/scripts:/usr/lib/jvm/default/bin:/usr/bin/site_perl:/usr/bin/vendor_perl:/usr/bin/core_perl:/usr/local/bin:~/scripts"
declare -x QTDIR="/usr/local/Qt"

You can also use a qt.conf file to point to your installed libs from your application directory.

Important: Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

Installation QT 5.11 on Raspberry Pi 3