mycroft_mark-2_gui_qt5.11 – TTD-Public

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Version 8 (modified by admin, 5 years ago) (diff)
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Mycroft Mark II - GUI using Qt 5.12 LTS

Building with distcc

The Pi is not the fastest machine and it has limited memory so one can not build for example qtwebengine locally. To use distcc (I have a cluster of 3 gentoo servers for that) I installed a proper toolchain on the hosts using gentoos crossdev with the proper versions for the raspian buster:

crossdev --g 8.3.0-r1 --l 2.28-r6 -t arm-linux-gnueabihf

I could not really make distcc work in a "regular" way so I used the good old wrapper method:

cd /usr/lib/distcc
sudo mkdir bin
cd bin

sudo nano arm-linux-gnueabihf-wrapper

#!/bin/bash
exec /usr/lib/distcc/bin/arm-linux-gnueabihf-g${0:$[-2]} "$@"

sudo chmod a+x arm-linux-gnueabihf-wrapper
sudo ln -s arm-linux-gnueabihf-wrapper c++
sudo ln -s arm-linux-gnueabihf-wrapper cc
sudo ln -s arm-linux-gnueabihf-wrapper g++
sudo ln -s arm-linux-gnueabihf-wrapper gcc
sudo ln -s ../../../bin/distcc arm-linux-gnueabihf-g++
sudo ln -s ../../../bin/distcc arm-linux-gnueabihf-g++-8
sudo ln -s ../../../bin/distcc arm-linux-gnueabihf-gcc
sudo ln -s ../../../bin/distcc arm-linux-gnueabihf-gcc-8
sudo ls -la

should look like that:

drwxr-xr-x 2 root root 4096 Apr 15 21:03 .
drwxr-xr-x 3 root root 4096 Apr 14 22:05 ..
lrwxrwxrwx 1 root root   19 Apr 14 22:12 arm-linux-gnueabihf-g++ -> ../../../bin/distcc
lrwxrwxrwx 1 root root   19 Apr 14 22:12 arm-linux-gnueabihf-g++-8 -> ../../../bin/distcc
lrwxrwxrwx 1 root root   19 Apr 14 22:12 arm-linux-gnueabihf-gcc -> ../../../bin/distcc
lrwxrwxrwx 1 root root   19 Apr 14 22:12 arm-linux-gnueabihf-gcc-8 -> ../../../bin/distcc
-rwxr-xr-x 1 root root   74 Apr 14 22:09 arm-linux-gnueabihf-wrapper
lrwxrwxrwx 1 root root   27 Apr 14 22:13 c++ -> arm-linux-gnueabihf-wrapper
lrwxrwxrwx 1 root root   27 Apr 14 22:13 cc -> arm-linux-gnueabihf-wrapper
lrwxrwxrwx 1 root root   27 Apr 14 22:13 g++ -> arm-linux-gnueabihf-wrapper
lrwxrwxrwx 1 root root   27 Apr 14 22:13 gcc -> arm-linux-gnueabihf-wrapper

to use distcc to build just set $PATH so that it contains /usr/lib/distcc/bin first:

export PATH=/usr/lib/distcc/bin:$PATH

add the build-host to the /etc/distcc/hosts

nano /etc/distcc/hosts

# Add a list of hostnames in one line, seperated by spaces, here.
192.168.14.70 192.168.14.5

then just call gcc or make.

test that distcc works

cd ~
mkdir distcc_test
cd distcc_test
nano main.c

with the content:

#include <stdio.h>
 
int main() {
    printf("Hello distcc!\n");
    return 0;
}

set distcc messages to verbose:

export DISTCC_VERBOSE=1

make sure that you have /usr/lib/distcc/bin in the begining of the PATH (see above)

gcc -c main.c -o main.o

you should see a lot of messages from distcc (look for something like

...
distcc[4931] (dcc_r_file_timed) 1032 bytes received in 0.000620s, rate 1626kB/s
distcc[4931] 16823 bytes from main.c compiled on 192.168.14.70 in 0.8614s, rate 19kB/s
distcc[4931] (dcc_unlock) release lock fd4
...

test that the file is for the correct target (that the translation of gcc to arm-linux-gnueabihf-gcc works)

file main.o

main.o: ELF 32-bit LSB relocatable, ARM, EABI5 version 1 (SYSV), not stripped

link and run:

gcc main.o -o main
./main

monitoring distcc

You can monitor the process of distcc with:

distccmon-text 1

while the build is running in another terminal, ...

Build QT 5.12 LTS for eglfs

Install and compile Qt 5.12 LTS using this excellent guide: https://www.tal.org/tutorials/building-qt-512-raspberry-pi.

Prerequisites

I did add 1GB swap and set the GPU memory to 16MB while building which worked without problem and took about 10 hours.

Download and build

The following steps are from that guide and is only here so that it does not get lost.

wget http://download.qt.io/official_releases/qt/5.12/5.12.7/single/qt-everywhere-src-5.12.7.tar.xz
tar xf qt-everywhere-src-5.12.7.tar.xz
git clone https://github.com/oniongarlic/qt-raspberrypi-configuration.git
cd qt-raspberrypi-configuration && make install DESTDIR=../qt-everywhere-src-5.12.7
apt-get update
apt-get install build-essential libfontconfig1-dev libdbus-1-dev libfreetype6-dev libicu-dev libinput-dev libxkbcommon-dev libsqlite3-dev libssl-dev libpng-dev libjpeg-dev libglib2.0-dev libraspberrypi-dev
mkdir build
cd build

then this command:

PKG_CONFIG_LIBDIR=/usr/lib/arm-linux-gnueabihf/pkgconfig:/usr/share/pkgconfig \
../qt-everywhere-src-5.12.7/configure -platform linux-rpi-g++ \
-v \
-opengl es2 -eglfs \
-no-gtk \
-opensource -confirm-license -release \
-reduce-exports \
-force-pkg-config \
-nomake examples -no-compile-examples \
-skip qtwayland \
-skip qtwebengine \
-no-feature-geoservices_mapboxgl \
-qt-pcre \
-no-pch \
-ssl \
-evdev \
-system-freetype \
-fontconfig \
-glib \
-prefix /opt/Qt5.12 \
-qpa eglfs

make -j2
make install

This results in the complete build in /opt/Qt5.12

Build QT 5.12 LTS with qtwebengine

If you have distcc working you can build (cross-compile) QT also with qtwebengine using:

PKG_CONFIG_LIBDIR=/usr/lib/arm-linux-gnueabihf/pkgconfig:/usr/share/pkgconfig \
../qt-everywhere-src-5.12.7/configure -platform linux-rpi-g++ \
-v \
-opengl es2 -eglfs \
-no-gtk \
-opensource -confirm-license -release \
-reduce-exports \
-force-pkg-config \
-nomake examples -no-compile-examples \
-skip qtwayland \
-no-feature-geoservices_mapboxgl \
-qt-pcre \
-no-pch \
-ssl \
-evdev \
-system-freetype \
-fontconfig \
-glib \
-prefix /opt/Qt5.12 \
-qpa eglfs

in the process above.

Building Kirigami

This is based on a combination of the official KDE guide to build the KDE framework at https://community.kde.org/Get_Involved/development#Set_up_kdesrc-build and this comprehensive guide at https://jbbgameich.github.io/misc/2019/05/25/kdesrc-build-custom-qt.html As above these are the pure commands:

mkdir -p ~/kde/src
cd ~/kde/src/
git clone https://anongit.kde.org/kdesrc-build.git && cd kdesrc-build
./kdesrc-build --initial-setup
source ~/.bashrc
nano ~/.kdesrc-buildrc

change the qtdir so that it points to the Qt5.12 installation and comment the qt5-build-include and custom-qt5-libs-build-include

#    qtdir  ~/kde/qt5 # Where to find Qt5
    qtdir /opt/Qt5.12
...
# Qt and some Qt-using middleware libraries
# include /home/pi/kde/src/kdesrc-build/qt5-build-include
# include /home/pi/kde/src/kdesrc-build/custom-qt5-libs-build-include

kdesrc-build kirigami --include-dependencies

Test Kirigami

Use the exmaple from https://api.kde.org/frameworks/kirigami/html/classorg_1_1kde_1_1kirigami_1_1ApplicationWindow.html (also attached) and try to run it.

mkdir -p ~/ws_qt/kirigami
cd ~/ws_qt/kirigami

either edit the file and paste the content

nano main.qml

or download the attachement

wget https://www.thinkthinkdo.com/trac/project1/raw-attachment/wiki/mycroft_mark-2_gui_qt5.11/main.qml

run it (showing additional debug output and adding the kde framwork build to the import path)

QT_DEBUG_PLUGINS=1 QML_IMPORT_TRACE=1 QML2_IMPORT_PATH=/home/pi/kde/usr/lib/arm-linux-gnueabihf/qml /opt/Qt5.12/bin/qmlscene ~/ws_qt/kirigami/main.qml

build kio

The mycroft-gui also need KIO from the framework. Build it as above for kirigami.

./kdesrc-build kio

Some of the packages failed to build but they don't seem to be necessary.

build the mycroft GUI

This is following https://github.com/MycroftAI/mycroft-gui but building the GUI manually for the QT5.12 and Kirigami installation above

cd ~
sudo apt-get install git -y
git clone https://github.com/mycroftai/mycroft-gui
cd mycroft-gui
sudo apt-get install -y git-core g++ cmake extra-cmake-modules gettext pkg-config
mkdir build-testing
cd build-testing

Thy mycroft-gui has some dependencies (WebView, Plasma) that I removed for now because I don't see where they are used but I will see. Edit the CMakeLists.txt to remove them:

nano ../CMakeLists.txt

...
find_package(Qt5 ${QT_MIN_VERSION} CONFIG REQUIRED COMPONENTS
    Quick
    Core
    Qml
    Network
    WebSockets
#    WebView
)
...
if(NOT CMAKE_SYSTEM_NAME STREQUAL "Android")
    find_package(Qt5Widgets ${QT_MIN_VERSION} REQUIRED)
#    find_package(KF5Plasma ${KF5_MIN_VERSION} REQUIRED)
    find_package(KF5DBusAddons ${KF5_MIN_VERSION} REQUIRED)
    find_package(KF5KIO ${KF5_MIN_VERSION} REQUIRED) # FIXME look for "KIOWidgets" (KRun) explicitly
endif()
...

nano ../application/main.cpp

...
#include <QDebug>
#include <QCursor>
// #include <QtWebView/QtWebView>

#ifdef Q_OS_ANDROID
...
    }

//    QtWebView::initialize();

    QQuickView view;
    view.setResizeMode(QQuickView::SizeRootObjectToView);
...

export CMAKE_PREFIX_PATH=/opt/Qt5.12:/home/pi/kde/usr
cmake .. -DCMAKE_INSTALL_PREFIX=/usr -DCMAKE_BUILD_TYPE=Release -DKDE_INSTALL_LIBDIR=lib -DKDE_INSTALL_USE_QT_SYS_PATHS=ON
make -j4
sudo make install

build lottie

rm -rf lottie-qml/
git clone https://github.com/kbroulik/lottie-qml
cd lottie-qml
mkdir build
cd build
export CMAKE_PREFIX_PATH=/opt/Qt5.12:/home/pi/kde/usr
cmake .. -DCMAKE_INSTALL_PREFIX=/usr -DCMAKE_BUILD_TYPE=Release -DKDE_INSTALL_LIBDIR=lib -DKDE_INSTALL_USE_QT_SYS_PATHS=ON
make
sudo make install

manually run the mycroft-gui

LD_LIBRARY_PATH=/opt/Qt5.12/lib:/home/pi/kde/usr/lib/arm-linux-gnueabihf QT_DEBUG_PLUGINS=1 QML_IMPORT_TRACE=1 QML2_IMPORT_PATH=/home/pi/kde/usr/lib/arm-linux-gnueabihf/qml /usr/bin/mycroft-gui-app