Raspberry Pi 3: debug info, how to fix?

jsulm · 16 Mar 2017, 06:18

@JiujiuTong Maybe you should try to call configure from a clean Qt source directory? Did you try to build Qt before for x86? Even better would be to do out of source build see http://stackoverflow.com/questions/1245011/how-to-build-qt-out-of-source

JiujiuTong · 16 Mar 2017, 06:20

@jsulm
i confirm the source file is clean ,it is download from QT. i have built the QT under windows and centos x64, but not for x86.

jsulm · wrote on 16 Mar 2017, 06:20

@JiujiuTong What I mean with this "Did you try to build Qt before for x86?" is - did you build for x86 OR x86_64 before from the SAME source code tree? Because currently you're linking against your host libraries.

JiujiuTong · J jsulm 16 Mar 2017, 06:10

@jsulm
and i have tried to start a simple qt application(just a page with nothing showed ). it works well .
the source file is clean every time i try to build the QT, i will delete the source file and extract it from source file.

JiujiuTong · wrote on 17 Mar 2017, 03:15

@crasskitty
sorry , i don't understand what's your meanings

sneubert · 20 Mar 2017, 02:42

I dont´t know if you still have the debugging problem but to answer to your first post:

The qt libraries for rpi are written to the qt5pi directory, outside of the rsynced sysroot.
The debugger is looking in the local sysroot directory for the libraries if you debug remote targets.
So just tell gdb to load the libraries of your project from the debugging target.
In Qt Creator go to Options->Debugger GDB-Tab an insert set sysroot target:/ in "Additional Startup Commands"

JiujiuTong · wrote on 20 Mar 2017, 02:42

@sneubert
thank you for your answer!
should I just insert "set sysroot target:/" in "Additional Startup Commands" or replace string with my ENV value?
I can understand you description, but confused with "set sysroot target:/" i have set sysroot to "/home/tong/rasp/sysroot" in build&run -->kits-->sysroot. should the target:/ be the real path or something? thank you very much!

sneubert · 20 Mar 2017, 08:32

Leave you sysroot path in build&run --> kit --> sysroot the way it is, because this is needed for building your application. The set sysroot command I told you is just for gdb to instruct loading libraries remote. Use the exact string set sysroot target:/ only for "Additional Startup Commands" in Options->Debugger GDB-Tab.

JiujiuTong · wrote on 20 Mar 2017, 08:32

@sneubert
OK, thank you !

JiujiuTong · 22 Mar 2017, 07:12

@SSGaist
can you help me out of this problem? thank you!
@jsulm
i have check the files , both ligQt5OpenGL.so and libQt5Multimedia.so exists,
and the build output is still:
/home/tong/raspi/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian-x64/bin/../lib/gcc/arm-linux-gnueabihf/4.8.3/../../../../arm-linux-gnueabihf/bin/ld: skipping incompatible /usr/lib/libpthread.so when searching for -lpthread
/home/tong/raspi/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian-x64/bin/../lib/gcc/arm-linux-gnueabihf/4.8.3/../../../../arm-linux-gnueabihf/bin/ld: skipping incompatible /usr/lib/libm.so when searching for -lm
/home/tong/raspi/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian-x64/bin/../lib/gcc/arm-linux-gnueabihf/4.8.3/../../../../arm-linux-gnueabihf/bin/ld: skipping incompatible /usr/lib/libc.so when searching for -lc
/home/tong/raspi/qt5pi/lib/libQt5MultimediaWidgets.so: undefined reference to QGLContext::currentContext()@Qt_5' /home/tong/raspi/qt5pi/lib/libQt5MultimediaWidgets.so: undefined reference toQGLShaderProgram::setAttributeArray(char const*, float const*, int, int)@Qt_5'
/home/tong/raspi/qt5pi/lib/libQt5MultimediaWidgets.so: undefined reference to QGLShaderProgram::hasOpenGLShaderPrograms(QGLContext const*)@Qt_5' /home/tong/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libQt5OpenGL.so.5: undefined reference toQStaticTextItem::setFontEngine(QFontEngine*)'
/home/tong/raspi/qt5pi/lib/libQt5MultimediaWidgets.so: undefined reference to QGLShaderProgram::addShaderFromSourceCode(QFlagsQGLShader::ShaderTypeBit, char const*)@Qt_5' /home/tong/raspi/qt5pi/lib/libQt5MultimediaWidgets.so: undefined reference toQGLContext::contextHandle() const@Qt_5'
/home/tong/raspi/qt5pi/lib/libQt5MultimediaWidgets.so: undefined reference to QGLShaderProgram::removeAllShaders()@Qt_5' /home/tong/raspi/qt5pi/lib/libQt5MultimediaWidgets.so: undefined reference toQGLShaderProgram::enableAttributeArray(char const*)@Qt_5'
/home/tong/raspi/qt5pi/lib/libQt5MultimediaWidgets.so: undefined reference to QGLShaderProgram::link()@Qt_5' /home/tong/raspi/qt5pi/lib/libQt5MultimediaWidgets.so: undefined reference toQGLShaderProgram::QGLShaderProgram(QGLContext const*, QObject*)@Qt_5'
/home/tong/raspi/qt5pi/lib/libQt5MultimediaWidgets.so: undefined reference to QGLShaderProgram::release()@Qt_5' /home/tong/raspi/qt5pi/lib/libQt5MultimediaWidgets.so: undefined reference toQGLShaderProgram::setUniformValue(char const*, QMatrix4x4 const&)@Qt_5'
/home/tong/raspi/sysroot/usr/lib/libactivemq-cpp.so: undefined reference to std::__throw_out_of_range_fmt(char const*, ...)@GLIBCXX_3.4.20' /home/tong/raspi/qt5pi/lib/libQt5MultimediaWidgets.so: undefined reference toQGLShaderProgram::~QGLShaderProgram()@Qt_5'
/home/tong/raspi/qt5pi/lib/libQt5MultimediaWidgets.so: undefined reference to QGLShaderProgram::log() const@Qt_5' /home/tong/raspi/qt5pi/lib/libQt5MultimediaWidgets.so: undefined reference toQGLShaderProgram::setUniformValue(char const*, float const () [4])@Qt_5'
/home/tong/raspi/qt5pi/lib/libQt5MultimediaWidgets.so: undefined reference to QGLShaderProgram::setUniformValue(char const, int)@Qt_5' /home/tong/raspi/qt5pi/lib/libQt5MultimediaWidgets.so: undefined reference toQGLShaderProgram::bind()@Qt_5'
collect2: error: ld returned 1 exit status

jsulm · 22 Mar 2017, 08:45

@JiujiuTong As I said "skipping incompatible" message means that the library is build for a different architecture. You're most probably mixing architectures.
/usr/lib/libpthread.so - this looks like a path on your host PC. You cannot use libraries from your host PC (X86_64) to cross compile for ARM.

jsulm · 22 Mar 2017, 08:39

@JiujiuTong Can you show your configure call?

JiujiuTong · 22 Mar 2017, 08:42

@jsulm
my configure is :
"./configure -release -opengl es2 -skip webengine -device linux-rasp-pi2-g++ -device-option CROSS_COMPILE=~/raspi/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian-x64/bin/arm-linux-gnueabihf- -sysroot ~/raspi/sysroot -opensource -confirm-license -make libs -prefix /usr/local/qt5pi -extprefix ~/raspi/qt5pi -hostprefix ~/raspi/qt5 -v "
my host is centos 7 x64, the target is raspberry pi3. thank you !

jsulm · 22 Mar 2017, 08:50

@JiujiuTong Does your sysroot contain all that incompatible libraries (like libpthread.so)?

JiujiuTong · 22 Mar 2017, 08:46

@jsulm
can you explain more precise, i'm just following the ways list by:
http://wiki.qt.io/RaspberryPi2EGLFS
should i do something else, if so can you help me ?

jsulm · wrote on 22 Mar 2017, 08:46

@JiujiuTong "-sysroot ~/raspi/sysroot" - does ~/raspi/sysroot contain file libpthread.so ?

JiujiuTong · 22 Mar 2017, 08:51

@jsulm
i just sync from raspberry, is there anyway to check if incompatible libraries are included in that path?

jsulm · 22 Mar 2017, 09:28

@JiujiuTong My question was: does it contain that file?

JiujiuTong · 22 Mar 2017, 10:51

@jsulm
yes,there is a libpthread.so

jsulm · 1 Apr 2017, 14:46

@JiujiuTong Can you do:

file PATH_TO/libpthread.so

and post the output?