Cross-Compile QT 5.12.3 / Raspberry Pi 3

출처: http://wapel.de/?p=603

Cross-Compile QT 5.12.3 / Raspberry Pi 3 – Marc Wapelhorst

Running Raspbian Stretch on Raspberry Pi 3A/B+

[on RPi] Install a bunch of development files (for simplicity we use build-dep, not everything is really needed, but it is easier this way).

Edit sources list in /etc/apt/sources.list and uncomment the deb-src line:

sudo nano /etc/apt/sources.list

Update your system and install required libraries:

sudo apt-get update sudo apt-get build-dep qt4-x11 sudo apt-get build-dep libqt5gui5 sudo apt-get install libudev-dev libinput-dev libts-dev libxcb-xinerama0-dev libxcb-xinerama0

Optional depending on your project:

sudo apt-get install wiringpi libnfc-bin libnfc-dev fonts-texgyre

Optional depending if you want to use QtMultimedia:

sudo apt-get install gstreamer1.0-plugins* libgstreamer1.0-dev libgstreamer-plugins-base1.0-dev libopenal-data libsndio6.1 libopenal1 libopenal-dev pulseaudio

 

[on RPi] Prepare our target directory

sudo mkdir /usr/local/qt5pi sudo chown pi:pi /usr/local/qt5pi

 

[onRPi] Correct links to EGL and GLES Drivers

sudo rm /usr/lib/arm-linux-gnueabihf/libEGL.so.1.0.0 sudo rm /usr/lib/arm-linux-gnueabihf/libGLESv2.so.2.0.0 sudo ln -s /opt/vc/lib/libbrcmEGL.so /usr/lib/arm-linux-gnueabihf/libEGL.so.1.0.0 sudo ln -s /opt/vc/lib/libbrcmGLESv2.so /usr/lib/arm-linux-gnueabihf/libGLESv2.so.2.0.0

 

[on host] Create our working directory and get a toolchain:

mkdir ~/raspi cd ~/raspi git clone https://github.com/raspberrypi/tools

 

[on host] Create a sysroot. Using rsync we can properly keep things synchronized in the future as well.

mkdir sysroot sysroot/usr sysroot/opt rsync -avz pi@yourpi:/lib sysroot rsync -avz pi@yourpi:/usr/include sysroot/usr rsync -avz pi@yourpi:/usr/lib sysroot/usr rsync -avz pi@yourpi:/opt/vc sysroot/opt

 

[on host] Adjust symlinks to be relative. Use provided script, because the old fixQualifiedLibraryPaths is not working properly:

wget https://raw.githubusercontent.com/riscv/riscv-poky/master/scripts/sysroot-relativelinks.py chmod +x sysroot-relativelinks.py ./sysroot-relativelinks.py sysroot

 

[on host] Get QT (start with qtbase first)

git clone git://code.qt.io/qt/qtbase.git -b 5.12.3 cd qtbase

 

[on host] Modify the qmake.conf  –> mkspecs/devices/linux-rasp-pi3-g++/qmake.conf

nano ~/raspi/qtbase/mkspecs/devices/linux-rasp-pi3-g++/qmake.confVC_LIBRARY_PATH = $$[QT_SYSROOT]/opt/vc/lib VC_INCLUDE_PATH = $$[QT_SYSROOT]/opt/vc/include VC_LINK_LINE = -L$${VC_LIBRARY_PATH} QMAKE_LIBDIR_OPENGL_ES2 = $${VC_LIBRARY_PATH} QMAKE_LIBDIR_EGL = $$QMAKE_LIBDIR_OPENGL_ES2 QMAKE_LIBDIR_OPENVG = $$QMAKE_LIBDIR_OPENGL_ES2

 

[on host] Compile, make, make install

./configure -release -opengl es2 -device linux-rasp-pi3-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 -no-use-gold-linker -v -no-gbm make -j4 make install

If you failed build –>

git clean -dfx

 

[on host] Deploy Qt to the device. We simply sync everything from ~/raspi/qt5pi to the prefix we configured above.

rsync -avz qt5pi pi@yourpi:/usr/local

 

[on RPi] Update the device to let the linker find the Qt libs:

echo /usr/local/qt5pi/lib | sudo tee /etc/ld.so.conf.d/qt5pi.conf sudo ldconfig

 

[on host] Build other Qt modules as desired, the steps are always the same:

git clone git://code.qt.io/qt/<qt-module>.git -b <qt-version> cd <qt-module> ~/raspi/qt5/bin/qmake make make install

My Modules:

• qtbase
• qtxmlpatterns
• qtsvg
• qtdeclarative
• qtimageformats
• qtgraphicaleffects
• qtquickcontrols
• qtquickcontrols2
• qtvirtualkeyboard
• qtwebsockets
• qtwebglplugin
• qtcharts
• qtconnectivity
• qtmultimedia
• qtlocation

Then deploy new files by running:

rsync -avz qt5pi pi@yourpi:/usr/local

 

Set physical Display size in mm:

sudo nano ~/.profile

# physical display properties

export QT_QPA_EGLFS_PHYSICAL_WIDTH=211

export QT_QPA_EGLFS_PHYSICAL_HEIGHT=127

source .profile