Qt5.12.9 migration tutorial based on Quanzhi H3

One . Preface

I played in College for a long time STM32 Single chip microcomputer ,STM32 Of MCU Most are based on Arm Cortex-M3/M4/M7 Architecture chip , It has strong real-time processing ability , but MCU Compared with MPU There are still limitations . Compared with MCU,MPU With higher processing and computing capabilities , Generally, you need to run a larger operating system （ Such as ：Linux、Andriod） To achieve complex task processing , It's up to MPU It should have higher dominant frequency and stronger computing power , Chief representative ：Arm Cortex-A Architecture's processor .

In order to complete the advanced on embedded , I bought a piece in a treasure Liunx Development board , The processor is based on ARM Cortex-A7 The whole ambition of architecture H3. The project needs to run on the development board QT application , But there is no QT Operating environment , You need to transplant it yourself .

Two . Download link

development environment  ：Ubuntu 18.04
Development board system ： Lite version Linux3.4
Qt Source code   ：qt-everywhere-src-5.12.9
Qt Creater：qt-opensource-linux-x64-5.12.9.run
Cross compiler ：gcc-linaro-4.9.4-2017.01-x86_64_arm-linux-guneabi.tar.xz

• Development board information （ Including development board firmware and source code ）https://pan.baidu.com/s/1a6F_0xYCsZj9S1xIl0FRmg（ password ：amxc）
• Qt Creater And Qt Source download link ：https://download.qt.io/archive/qt/
• Cross compiler official download link ：https://releases.linaro.org/components/toolchain/binaries/
• Cross compiler Tsinghua University mirror download link ：https://mirrors.tuna.tsinghua.edu.cn/armbian-releases/_toolchain/
• GLIBC Library official download link ：https://sourceware.org/glibc/wiki/Glibc%20Timeline
• Xshell Download link of green version ：https://423down.lanzouh.com/b0f2b54tc

among Qt If you don't want to search the source code and cross compiler directly on the official website , You can also directly CSDN download ：

• qt-everywhere-src-5.12.9：
• gcc-linaro-4.9.4-2017.01-x86_64_arm-linux-guneabi.tar.xz

3、 ... and . System compilation

Update compiler

Linux The source code of the system is provided by the merchant , First, decompression. H3-DVK-lichee-201809.tar To Ubuntu In the system ,Linux The default cross compiler version in the source code is too low , Need to replace with 4.9.4 edition Cross compiler for . Replace the decompressed cross compiler in the source code lichee/brandy/gcc-linaro Folder .

Source code compilation

First compilation , You need to import the default kernel configuration , Get into linux3.4 Folder . perform ：

cp H3_defconfig .config

Return to lichee Folder , Re execution ：

./build.sh config
# Choose in turn  1 1 0 2
# If you are prompted usbwifi  choice  y

Only the first compilation requires config, Compile again later with the command

./build.sh 

After successful compilation , Package firmware ：

./build.sh pack
#  Firmware location ：tools/pack/sun8iw7p1_dragonboard_dolphin.img

Four . QT Source code compilation

Add compiler path

decompression Qt Source code to Ubuntu System , Modify file content ：
route ：qt-everywhere-src-5.12.9/qtbase/linux-arm-gnueabi-g++/qmake.conf
Purpose ： Mainly to specify compilation Qt Compiler path of source code , Here, select just copied to lichee Compiler in source code .

#
# qmake configuration for building with arm-linux-gnueabi-g++
# MAKEFILE_GENERATOR = UNIX
CONFIG                 += incremental
QMAKE_INCREMENTAL_STYLE = sublib

include(../common/linux.conf)
include(../common/gcc-base-unix.conf)
include(../common/g++-unix.conf)

# modifications to g++.conf
QMAKE_CC                = /home/dell/linux_H3/lichee/brandy/gcc-linaro/bin/arm-linux-gnueabi-gcc
QMAKE_CXX               = /home/dell/linux_H3/lichee/brandy/gcc-linaro/bin/arm-linux-gnueabi-g++
QMAKE_LINK              = /home/dell/linux_H3/lichee/brandy/gcc-linaro/bin/arm-linux-gnueabi-g++
QMAKE_LINK_SHLIB        = /home/dell/linux_H3/lichee/brandy/gcc-linaro/bin/arm-linux-gnueabi-g++

# modifications to linux.conf
QMAKE_AR                = /home/dell/linux_H3/lichee/brandy/gcc-linaro/bin/arm-linux-gnueabi-ar cqs
QMAKE_OBJCOPY           = /home/dell/linux_H3/lichee/brandy/gcc-linaro/bin/arm-linux-gnueabi-objcopy
QMAKE_NM                = /home/dell/linux_H3/lichee/brandy/gcc-linaro/bin/arm-linux-gnueabi-nm -P
QMAKE_STRIP             = /home/dell/linux_H3/lichee/brandy/gcc-linaro/bin/arm-linux-gnueabi-strip
load(qt_config)

To configure 、 compile 、 install

Get into qt-everywhere-src-5.12.9 directories creating config.sh The configuration script , The content is ：

./configure \
 -prefix /home/dell/qt_install \
 -xplatform linux-arm-gnueabi-g++ \
 -confirm-license \
 -opensource \
 -release \
 -shared \
 -qt-zlib \
 -qt-freetype \
 -sql-sqlite \
 -qt-libjpeg \
 -no-qml-debug \
 -no-dbus \
 -no-gif \
 -no-iconv \
 -no-opengl \
 -no-cups \
 -no-glib \
 -no-rpath \
 -no-avx \
 -no-openssl \
 -nomake tools \
 -qt-libpng \
 -no-tslib \

among ,-prefix /home/dell/qt_install For the specified Qt Library installation path ,-xplatform linux-arm-gnueabi-g++ Specify compiler for , Other options can be increased or decreased according to your own needs Qt Components , Cut properly .

Modify the Execution Authority

chmod 777 config,sh

Perform configuration

./config.sh

Compile source code

make -j16

install Qt

make install

After installation , Compiled Qt The library is right there /home/dell/qt_install in .

5、 ... and . QT Migration and environment variable addition

Compile the last step Qt library , namely /home/dell/qt_install, Copy the entire folder to lichee/buildroot/target/dragonboard/rootfs/opt/ in .

modify lichee/buildroot/target/dragonboard/extra/profile , Add global variable ：

export LD_LIBRARY_PATH=/opt/qt_install/lib
export QT_QPA_PLATFORM_PLUGIN_PATH=/opt/qt_install/plugins
export QT_QPA_PLATFORM=linuxfb:fb=/dev/fb0

Recompile after modification linux, Packing system .

./build.sh 
./build.sh pack

6、 ... and . upgrade GLIBC

Burn the firmware packaged in the previous step into the development board , Use Xshell Connect the serial port to the development board and open the terminal , Get into opt/qt_install/example Catalog , Open any one Qt Example , Execute the executable file under the corresponding folder .

Qt Error report in execution , This is because we have replaced a higher version of the cross compiler , The original in the system source code C/C++ The library does not support .

You can execute the following command under the corresponding folder to view the corresponding version number ：

strings libstdc++.so.6 | grep CXXABI   #  stay /usr/lib In the implementation of , see CXXABI Version number 
strings libc.so.6 | grep GLIBC         #  stay /lib In the implementation of , see GLIBC Version number 

We need to migrate the corresponding library files in the new compiler into the system . The corresponding library file is in gcc-linaro/arm-linux-gnueabi/libc Next .

Here, it is rude to copy all the files in this directory to lichee/buildroot/target/dragonboard/rootfs/lib/ as well as lichee/buildroot/target/dragonboard/rootfs/usr/lib/ in , Overwrite the library with the same name .

7、 ... and . function QT Program

After successfully upgrading the Library , Run again Qt Executable files in the case , A successful run , thus Qt.5.12.9 Successful transplantation .

8、 ... and . Reference material

1. Full ambition H3 System development , transplant Linux System +Qt5.9.5
2. How to be in Quanzhi H3 Run on the hardware platform Qt
3. Ubuntu14.04（64 position ） Build cross compiler environment
4. Ubuntu build ARM platform QT Environmental Science
5. ARM-GCC And development board HelloWorld