交叉编译Qt5.12.8到树莓派3B+

硬件

主机系统：Ubuntu16.04

树莓派3B+系统：Raspbian

 

1 准备Raspberry Pi

/etc/apt/sources.list中的编辑源列表，并取消注释deb-src行

sudo nano /etc/apt/sources.list

更新，下载需要的开发包

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

2准备Linux主机

创建文件夹

mkdir ~/raspi
cd ~/raspi

克隆交叉编译工具链

git clone https://github.com/raspberrypi/tools

将工具链二进制目录添加到PATH。打开.bashrc并在文件末尾添加行

nano ~/.bashrc
export PATH=$PATH:～/raspi/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian-x64/bin

下载Qt源码

wget https://download.qt.io/official_releases/qt/5.12/5.12.8/single/qt-everywhere-src-5.12.8.tar.xz
tar xf qt-everywhere-src-5.12.8.tar.xz

获取树莓派sysroot

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

修改raspberrypi_ip为你当前树莓派的ip地址，在同步时需要一些时间

将绝对符号链接转换为相对符号链接

#!/usr/bin/env python
import sys
import os

# Take a sysroot directory and turn all the abolute symlinks and turn them into
# relative ones such that the sysroot is usable within another system.

if len(sys.argv) != 2:
    print("Usage is " + sys.argv[0] + "")
    sys.exit(1)

topdir = sys.argv[1]
topdir = os.path.abspath(topdir)

def handlelink(filep, subdir):
    link = os.readlink(filep)
    if link[0] != "/":
        return
    if link.startswith(topdir):
        return
    #print("Replacing %s with %s for %s" % (link, topdir+link, filep))
    print("Replacing %s with %s for %s" % (link, os.path.relpath(topdir+link, subdir), filep))
    os.unlink(filep)
    os.symlink(os.path.relpath(topdir+link, subdir), filep)

for subdir, dirs, files in os.walk(topdir):
    for f in files:
        filep = os.path.join(subdir, f)
        if os.path.islink(filep):
            #print("Considering %s" % filep)
            handlelink(filep, subdir)

将上面代码保存为sysroot-relativelinks.py

chmod +x sysroot-relativelinks.py
./sysroot-relativelinks.py sysroot

 

编译、安装Qt

cd qt-everywhere-src-5.12.8/qtbase
mkdir qt5build
cd qt5build
../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 -skip qtwayland -skip qtlocation -skip qtscript -make libs -prefix /usr/local/Qt5.12.8 -extprefix ~/raspi/Qt5.12.8-pi -hostprefix ~/raspi/Qt5.12.8-host -no-use-gold-linker -v -no-gbm
make -j4
make install

编译完成后将~/raspi/Qt5.12.8-pi/拷贝到树莓派的/usr/local/Qt5.12.8/

 

参考

交叉编译并部署Qt5.12.4到树莓派3B+：https://blog.csdn.net/lixiaoxin1989/article/details/90030624

 

Qt 5.9.4和RPi的交叉编译指南：https://www.raspberrypi.org/forums/viewtopic.php?t=204529

Raspberry Pi Beginners Guide：https://wiki.qt.io/Raspberry_Pi_Beginners_Guide