Configuration issue (sysroot, libraries) when build yocto Qt5 for beaglebone

Fanning

Hello,

I'm using Yocto and configures a dedicated kit to the cross compilation environment for beagle bone black.
When I tried to compile a "helloworld" program I had a linking issue.

Host: ubuntu 16.04 64 Bit, YP Core - Krogoth 2.1.1(Yocto), Qt 5.6.1

I bitbake @bitbake meta-toolchain-qt5@ and the output :
@/home/fanning/data/yocto_bbb/build/tmp/deploy/sdk@

I run scrip @poky-glibc-x86_64-meta-toolchain-qt5-cortexa8hf-neon-toolchain-2.1.1.sh@ and the output save to /opt.

QtCreator configuration

I did update qtcreator.sh to set the env variable required for cross compilation
Sysyroot: @/opt/poky/2.1.1/sysroots/x86_64-pokysdk-linux@
Compiler: @/opt/poky/2.1.1/sysroots/x86_64-pokysdk-linux/usr/bin/arm-poky-linux-gnueabi/arm-poky-linux-gnueabi-g++ @
QtVersion: @/opt/poky/2.1.1/sysroots/x86_64-pokysdk-linux/usr/bin/qt5/qmake@(qt 5.6.2).
Debug: @/opt/poky/2.1.1/sysroots/x86_64-pokysdk-linux/usr/bin/arm-poky-linux-gnueabi/arm-poky-linux-gnueabi-gdb@

The issue
When I tried to compile my "Hello" program (named QtVersion and writing the version of Qt in a console), the linker is giving me the following error.

g++ -o QtVersion main.o -lQt5Core -lpthread
/usr/bin/ld: cannot find -lQt5Core

When i try:
@INCLUDEPATH += /opt/poky/2.1.1/sysroots/cortexa8hf-neon-poky-linux-gnueabi/usr/include@
@LIBS += /opt/poky/2.1.1/sysroots/cortexa8hf-neon-poky-linux-gnueabi/usr/lib/*.so@ into .pro file on Qt then error

Error: @/opt/poky/2.1.1/sysroots/cortexa8hf-neon-poky-linux-gnueabi/usr/lib/libBrokenLocale.so: error adding symbols: File in wrong format@

I hope you will be able to help me to solve it.

Thx and rgds,
Fanning

jsulm

@Fanning said in Configuration issue (sysroot, libraries) when build yocto Qt5 for beaglebone:

LIBS += /opt/poky/2.1.1/sysroots/cortexa8hf-neon-poky-linux-gnueabi/usr/lib/*.so

Are you adding ALL libs?
If it says wrong format then you're probably using wrong compiler (your host compiler?).
You call

g++ -o QtVersion main.o -lQt5Core -lpthread

What is g++ in this case (you can check calling 'which g++')? It should be your cross- compiler not the host x86 compiler. You can specify the whole path to the compiler.

Fanning

Hi, thank for your rep !

If i change like this: @LIBS += /opt/poky/2.1.1/sysroots/cortexa8hf-neon-poky-linux-gnueabi/usr/lib/Qt.so@

Error:
g++ -o BBB main.o /opt/poky/2.1.1/sysroots/cortexa8hf-neon-poky-linux-gnueabi/usr/lib/Qt.so -lQt5Core -lpthread
/opt/poky/2.1.1/sysroots/cortexa8hf-neon-poky-linux-gnueabi/usr/lib/libQt53DCore.so: error adding symbols: File in wrong format.

I check @which g++@ the output @/usr/bin/g++@

What i can do to change compiler arm-poky-linux on Qt ?

tasi

Hi Fanning,

have you any solution?

Thanks,
Tasi

mostefa

@Fanning said in Configuration issue (sysroot, libraries) when build yocto Qt5 for beaglebone:

Hello,

I'm using Yocto and configures a dedicated kit to the cross compilation environment for beagle bone black.
When I tried to compile a "helloworld" program I had a linking issue.

Host: ubuntu 16.04 64 Bit, YP Core - Krogoth 2.1.1(Yocto), Qt 5.6.1

I bitbake @bitbake meta-toolchain-qt5@ and the output :
@/home/fanning/data/yocto_bbb/build/tmp/deploy/sdk@

I run scrip @poky-glibc-x86_64-meta-toolchain-qt5-cortexa8hf-neon-toolchain-2.1.1.sh@ and the output save to /opt.

QtCreator configuration

I did update qtcreator.sh to set the env variable required for cross compilation
Sysyroot: @/opt/poky/2.1.1/sysroots/x86_64-pokysdk-linux@

Hi, for me the problem is your sysroot path in Qt creator:

/opt/poky/2.1.1/sysroots/x86_64-pokysdk-linux

Path of sysroot need to be something like this :

/opt/poky/1.6.3/sysroots/armv6-vfp-poky-linux-gnueabi/

This path is according to my raspberrypi build (with daisy branch of meta-raspberry)

So i think that path of your sysroot should be something like this:

/opt/poky/2.1.1/sysroots/cortexa8hf-neon-poky-linux-gnueabi

Hope this can help you, if not keep me informed

tasi

Hi mostefa,

I setting like you, but error still occurs
"/usr/bin/ld: cannot find -lQt5Core"

Thanks,
Tasi

mostefa

@tasi

Try to :

close qtcreator
where your qtcreator is installed , open your qtcreator.sh wih gedit and add the following line:

source /opt/poky/2.1.1/sysroots/cortexa8hf-neon-poky-linux-gnueabi

on the top of your qtcreator.sh

and save ,

Run your qtcreator again and see if it is better,

I also advise to install a new clean version of qtcreator , (maybe your env variable are not good now)

this version worked for me with raspberrypi:

http://download.qt-project.org/official_releases/qtcreator/3.2/3.2.2/qt-creator-opensource-linux-x86_64-3.2.2.run

and then do the step i described.

Waiting for your feedback !

jsulm

@tasi @mostefa I would not do any hacks like editing qtcreator.sh! This is not the clean solution.
You just need to set-up your Kit for cross-compilation correctly in QtCreator: select correct compiler and correct Qt version.
Did you actually set-up a Kit?

mostefa

@jsulm said in Configuration issue (sysroot, libraries) when build yocto Qt5 for beaglebone:

@tasi @mostefa I would not do any hacks like editing qtcreator.sh! This is not the clean solution.
You just need to set-up your Kit for cross-compilation correctly in QtCreator: select correct compiler and correct Qt version.
Did you actually set-up a Kit?

AFAIK, this is a common practice, for embedded device !!!

https://community.nxp.com/thread/309578

https://community.nxp.com/docs/DOC-95251

http://wiki.hioproject.org/index.php?title=HIO_Wiki:Set_Up_Qt_Creator_for_Yocto_Device

chaithubk

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