Cross compile Qt (Windows) to Raspberry 3

[Garyio]

@pVit Can you tell us how you got the tutorial by sysprogs to work? I think most people are having problems getting it to work.

[pVit]

@Garyio
What problem do you have? I did everything in tutorial, used mingw32-gcc 4.7.2, python 2.7.11 and raspberry-gcc 4.6.3 and everything is okay.

[small_bird]

@Hannu Hi, you said Qt5.6.1 has problems with opengl es? What is the problem ?

[lygstate]

Where to download MINGW64 gcc 4.9.2

[jsulm]

@lygstate The easiest way is to use Qt Maintenance Tool if you used Qt Online Installer to install Qt.
Also, how is your question related to this thread?

[lygstate]

How to exclude qtscript from build?

[lygstate]

If the steps is not appear, then following the steps in https://visualgdb.com/tutorials/raspberry/qt/embedded/, otherwise using the steps below instead

• Step 3: Download gcc 4.9.2 for Windows
  https://wiki.qt.io/MinGW
  https://download.qt.io/online/qtsdkrepository/windows_x86/desktop/tools_mingw/
  The download URL is
  https://download.qt.io/online/qtsdkrepository/windows_x86/desktop/tools_mingw/qt.tools.win32_mingw492/4.9.2-1i686-4.9.2-release-posix-dwarf-rt_v3-rev1.7z
  extract as C:/SysGCC/mingw32
  gcc would placed at C:/SysGCC/mingw32/bin/gcc.exe

• Step 5: Download Qt 5.8.0/Qt 5.6.1 source
  and extract as
  C:\SysGCC\qt-everywhere-opensource-src-5.8.0
  There is path C:\SysGCC\qt-everywhere-opensource-src-5.8.0\qtbase

• Step 6: Sync sysroot

  /lib
  /usr/include
  /usr/lib
  /usr/local/include
  /usr/local/lib
  /opt
  
  /opt/vc
  

• Step 7: Install MSYS2
  Download newest msys2 from http://www.msys2.org/
  http://repo.msys2.org/distrib/x86_64/msys2-x86_64-20161025.exe
  Install it.
  open msys2/mingw32.exe

  pacman -S make perl pkg-config diffutils
  

  Close the shell

• Steop 8: Edit ~/.bashrc
  Append following lines

  export PATH=$PATH:/c/SysGCC/mingw32/bin
  export PATH=$PATH:/c/Python27
  export PATH=$PATH:/c/SysGCC/Raspberry/bin
  mkdir -p /c/SysGCC/qt-build
  cd /c/SysGCC/qt-build
  

  open msys2/mingw32.exe

• Step 9: Check that gcc is linked to C:/SysGCC/mingw32/bin/gcc.exe

• Step10: Prepare the source code
  Copy folder qt-everywhere-opensource-src-5.8.0\qtbase\mkspecs\linux-arm-gnueabi-g++\
  and it's contents as
  qt-everywhere-opensource-src-5.8.0\qtbase\mkspecs\linux-arm-gnueabihf-g++\
  in folder qt-everywhere-opensource-src-5.8.0\qtbase\mkspecs\linux-arm-gnueabihf-g++\
grep -irn arm-linux-gnueabi- arm-linux-gnueabihf- .

  Edit qt-everywhere-opensource-src-5.8.0\qtbase\mkspecs\devices\linux-rpi3-g++\qmake.conf
  Replace part lines with (This should also works for Qt 5.6.1, not tested for OpenGL ES):

  VC_LIBRARY_PATH         = $$[QT_SYSROOT]/opt/vc/lib
  VC_INCLUDE_PATH         = $$[QT_SYSROOT]/opt/vc/include
  
  QMAKE_LFLAGS           += -L$${VC_LIBRARY_PATH}
  
  VC_LINK_LINE            = -L$${VC_LIBRARY_PATH}
  

• Step 12: Configure for Host & Target(Only Qt 5.8 and upper, Qt 5.7 not tested)
  For Qt 5.8 Host & Target
  No step 16, results are in step 16.

  ../qt-everywhere-opensource-src-5.8.0/configure -skip qtscript -platform win32-g++ -xplatform linux-arm-gnueabihf-g++ -release -device linux-rpi3-g++ -sysroot C:/SysGCC/Raspberry/arm-linux-gnueabihf/sysroot -prefix /usr/local/qt5 -device-option CROSS_COMPILE=C:/SysGCC/Raspberry/bin/arm-linux-gnueabihf- -nomake examples -opensource -confirm-license
  

  For Qt 5.6 and lower, Only Host

  ../qt-everywhere-opensource-src-5.6.1/configure -skip qtscript -platform win32-g++ -xplatform linux-arm-gnueabihf-g++ -release -device linux-rpi3-g++ -sysroot C:/SysGCC/Raspberry/arm-linux-gnueabihf/sysroot -prefix /usr/local/qt5 -opensource -confirm-license
  

• Step13: Skip

• Step 14: This is normal as long as qmake.exe got built. Check this by running qtbase/bin/qmake -v

• Step 15: Skip

• Step 16: Configure the Target (Only Qt 5.6 and lower), otherwise Skip it
  Remove -std=c++1z from qt-everywhere-opensource-src-5.6.1\qtbase\mkspecs\devices\linux-rpi3-g++\qmake.conf
  Qt 5.6.x execute the following command

  ../qt-everywhere-opensource-src-5.6.1/configure -skip qtscript -platform win32-g++ -xplatform linux-arm-gnueabihf-g++ -release -device linux-rpi3-g++ -sysroot C:/SysGCC/Raspberry/arm-linux-gnueabihf/sysroot -prefix /usr/local/qt5 -device-option CROSS_COMPILE=C:/SysGCC/Raspberry/bin/arm-linux-gnueabihf- -nomake examples -opensource -confirm-license
  

• Step 17: Building And Install

  make && make install
  

[jsulm]

@lygstate Pass this to configure:

-skip qtscript

[lygstate]

@jsulm Thanks, I am using this method.

[CrazyCreepy]

I do all the tuto and i can make a excutable with qt but the qlabel and the qpushbutton it isn't show. i think it's because when create the qmake the modul gtk isn't enable. when i try to enable it that said

ERROR: Feature 'gtk3' was enabled, but the pre-condition 'features.glib && libs.gtk3' failed.

it's do 1 week i try to fine how to fix the pre-condition.

[jsulm]

@CrazyCreepy "qlabel and the qpushbutton it isn't show" - what does it mean? Are they not shown at all, or no text?
For gtk3 support you probably need to install gtk3 dev packages, but it actually should work without.
If there is no text then you probably have some font issues.

[CrazyCreepy]

@jsulm I mean the label and push button doesn't exist! if i wants to close my windows i will use httop... it work without gtk3 but not all feature is enable and this can be very problematic later... and i installe Gtk3 on my rasp, but they change noting i need to configure in my compiler but i don't know how .

[jsulm]

@CrazyCreepy As I said you need to install gtk3/glib dev packages on your RPi/sysroot and then build Qt (there is nothing to configure in compiler).
"label and push button doesn't exist" - you probably mean - they are not shown?

[CrazyCreepy]

that what i get on my raspberry pi

and that was i get

I have already install the glib and gtk3 on my raspberry... I also try to syncronize all of my raspberry pi with smartputty in my sysroot and it's doesn't work... I'm little exhausted of this.... thanks for help.

[pinballsp]

Hello.

Very good instructions to config QT5 for RPY3 with cross. I try to install but fail in step6, seem some permissions problem, but do not know why, I work with Administrator user, and I have change permissions to all files to get access to all users.

This is capture screen about fail when I try to run step 6 to syncronize sysroot. Somebody may help me, why fail ??. Translation to english language about the error message is "Cannot connect: Try to access to one socket not allowed because your access permissions 192.168.1.7"

If I run directly StmarTTY from Windows work perfectly, but I run SmarTTY from a DOS window also fail with same error message,

[pinballsp]

.

Hello.

My before problem was because the firewall, already solved. I have follow instructions of lystate user, and all seem ok but fail in last step, with this error message.

Somebody know how to solve this problem to may compile ??

.

And this is the content of the config.log file:

executing config test use_gold_linker
cd C:\SysGCC\qt-build\qtbase\config.tests && C:/SysGCC/Raspberry/bin/arm-linux-gnueabihf-g++ -fuse-ld=gold -o conftest-out conftest.cpp
cc1plus.exe: error: unrecognized command line option '-fuse-ld=gold'

test config.qtbase.tests.use_gold_linker FAILED
executing config test verifyspec

cd C:\SysGCC\qt-build\qtbase\config.tests\common\verifyspec && C:\SysGCC\qt-build\qtbase\bin\qmake.exe -qtconf C:/SysGCC/qt-build/qtbase/bin/qt.conf "CONFIG -= qt debug_and_release app_bundle lib_bundle" "CONFIG += shared console" "QMAKE_CFLAGS += --sysroot=C:/SysGCC/Raspberry/arm-linux-gnueabihf/sysroot" "QMAKE_CXXFLAGS += --sysroot=C:/SysGCC/Raspberry/arm-linux-gnueabihf/sysroot" "QMAKE_LFLAGS += --sysroot=C:/SysGCC/Raspberry/arm-linux-gnueabihf/sysroot" C:/SysGCC/qt-everywhere-opensource-src-5.8.0/qtbase/config.tests/common/verifyspec

cd C:\SysGCC\qt-build\qtbase\config.tests\common\verifyspec && set MAKEFLAGS=& C:/SysGCC/msys2/usr/bin/make

C:/SysGCC/Raspberry/bin/arm-linux-gnueabihf-g++ -c -march=armv8-a -mtune=cortex-a53 -mfpu=crypto-neon-fp-armv8 -mfloat-abi=hard --sysroot=C:/SysGCC/Raspberry/arm-linux-gnueabihf/sysroot -O2 -Wall -W -fPIC -IC:/SysGCC/qt-everywhere-opensource-src-5.8.0/qtbase/config.tests/common/verifyspec -I. -IC:/SysGCC/qt-everywhere-opensource-src-5.8.0/qtbase/mkspecs/devices/linux-rpi3-g++ -o verifyspec.obj C:/SysGCC/qt-everywhere-opensource-src-5.8.0/qtbase/config.tests/common/verifyspec/verifyspec.cpp

cc1plus.exe: error: bad value (armv8-a) for -march switch
cc1plus.exe: error: bad value (cortex-a53) for -mtune switch

C:/SysGCC/qt-everywhere-opensource-src-5.8.0/qtbase/config.tests/common/verifyspec/verifyspec.cpp:1:0: error: invalid floating point option: -mfpu=crypto-neon-fp-armv8
make: *** [Makefile:176: verifyspec.obj] Error 1
executing config test verifyspec

cd C:\SysGCC\qt-build\qtbase\config.tests\common\verifyspec && C:\SysGCC\qt-build\qtbase\bin\qmake.exe -qtconf C:/SysGCC/qt-build/qtbase/bin/qt.conf "CONFIG -= qt debug_and_release app_bundle lib_bundle" "CONFIG += shared console" "QMAKE_CFLAGS += --sysroot=C:/SysGCC/Raspberry/arm-linux-gnueabihf/sysroot" "QMAKE_CXXFLAGS += --sysroot=C:/SysGCC/Raspberry/arm-linux-gnueabihf/sysroot" "QMAKE_LFLAGS += --sysroot=C:/SysGCC/Raspberry/arm-linux-gnueabihf/sysroot" C:/SysGCC/qt-everywhere-opensource-src-5.8.0/qtbase/config.tests/common/verifyspec

cd C:\SysGCC\qt-build\qtbase\config.tests\common\verifyspec && set MAKEFLAGS=&

C:/SysGCC/msys2/usr/bin/make clean && set MAKEFLAGS=& C:/SysGCC/msys2/usr/bin/make
rm -f verifyspec.obj
rm -f *~ core *.core

C:/SysGCC/Raspberry/bin/arm-linux-gnueabihf-g++ -c -march=armv8-a -mtune=cortex-a53 -mfpu=crypto-neon-fp-armv8 -mfloat-abi=hard --sysroot=C:/SysGCC/Raspberry/arm-linux-gnueabihf/sysroot -O2 -Wall -W -fPIC -IC:/SysGCC/qt-everywhere-opensource-src-5.8.0/qtbase/config.tests/common/verifyspec -I. -IC:/SysGCC/qt-everywhere-opensource-src-5.8.0/qtbase/mkspecs/devices/linux-rpi3-g++ -o verifyspec.obj C:/SysGCC/qt-everywhere-opensource-src-5.8.0/qtbase/config.tests/common/verifyspec/verifyspec.cpp

cc1plus.exe: error: bad value (armv8-a) for -march switch
cc1plus.exe: error: bad value (cortex-a53) for -mtune switch

C:/SysGCC/qt-everywhere-opensource-src-5.8.0/qtbase/config.tests/common/verifyspec/verifyspec.cpp:1:0: error: invalid floating point option: -mfpu=crypto-neon-fp-armv8

make: *** [Makefile:176: verifyspec.obj] Error 1

[jsulm]

@pinballsp armv8-a? Shouldn't it be armv7 for RPi? Please show your configure call.

[ahmedawad]

@lygstate I followed your steps in details, but it looks like there is something wrong in step 10. My compilation terminates due to #include <EGL/egl.h> not found.

Please can you elaborate step 10 again. Inside the directory "qt-everywhere-opensource-src-5.8.0\qtbase\mkspecs" , there only exist "linux-arm-gnueabi-g++" and no other directory called "linux-arm-gnueabihf-g++" under that path found.
Is it the same to open "qt-everywhere-opensource-src-5.8.0\qtbase\mkspecs\linux-arm-gnueabi-g++\qmake.conf" and change every instance of arm-linux-gnueabi- with arm-linux-gnueabihf- ??

Any way the error I get is as follows:


Please did you go through all these steps and compiled 5.8 at the end ?

Thanks in advance

[K-Str]

This post is deleted!

[K-Str]

@etiennedm ,
thanks for this very good tutorial.
It works without any problems and you can follow them without any modification.
I would be happy if I can find such detailed description also for actual Qt5 for cross compiling on a Windows machine and other Qt5 topics!
Kurt