RISC-V搭建嵌入式QT开发环境

安装环境：
Ubuntu18.04
GCC：gcc version 7.5.0 (Ubuntu 7.5.0-3ubuntu1~18.04)
CROOSS-tools：gcc version 8.3.0 (crosstool-NG 1.24.0)

下载5.12安装包，解压后修改qmake.conf配置参数，将编译工具修改为交叉编译器

/qt-everywhere-src-5.12.12$ vi qtbase/mkspecs/linux-arm-gnueabi-g++/qmake.conf

#
# qmake configuration for building with arm-linux-gnueabi-g++
#

MAKEFILE_GENERATOR      = UNIX
CONFIG                 += incremental
QMAKE_INCREMENTAL_STYLE = sublib


QT_QPA_DEFAULT_PLATFORM = linuxfb #eglfs

QMAKE_CFLAGS_RELEASE   += -O2 -march=armv7-a

QMAKE_CXXFLAGS_RELEASE += -O2 -march=armv7-a


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

# modifications to g++.conf
QMAKE_CC           = /home/luckfox/workspace/luckfox-pico/tools/linux/toolchain/arm-rockchip830-linux-uclibcgnueabihf/bin/arm-rockchip830-linux-uclibcgnueabihf-gcc
QMAKE_CXX          = /home/luckfox/workspace/luckfox-pico/tools/linux/toolchain/arm-rockchip830-linux-uclibcgnueabihf/bin/arm-rockchip830-linux-uclibcgnueabihf-g++
QMAKE_LINK         = /home/luckfox/workspace/luckfox-pico/tools/linux/toolchain/arm-rockchip830-linux-uclibcgnueabihf/bin/arm-rockchip830-linux-uclibcgnueabihf-g++
QMAKE_LINK_SHLIB   = /home/luckfox/workspace/luckfox-pico/tools/linux/toolchain/arm-rockchip830-linux-uclibcgnueabihf/bin/arm-rockchip830-linux-uclibcgnueabihf-g++

# modifications to linux.conf
QMAKE_AR           = /home/luckfox/workspace/luckfox-pico/tools/linux/toolchain/arm-rockchip830-linux-uclibcgnueabihf/bin/arm-rockchip830-linux-uclibcgnueabihf-ar cqs
QMAKE_OBJCOPY     = /home/luckfox/workspace/luckfox-pico/tools/linux/toolchain/arm-rockchip830-linux-uclibcgnueabihf/bin/arm-rockchip830-linux-uclibcgnueabihf-objcopy
QMAKE_NM           = /home/luckfox/workspace/luckfox-pico/tools/linux/toolchain/arm-rockchip830-linux-uclibcgnueabihf/bin/arm-rockchip830-linux-uclibcgnueabihf-nm -P
QMAKE_STRIP        = /home/luckfox/workspace/luckfox-pico/tools/linux/toolchain/arm-rockchip830-linux-uclibcgnueabihf/bin/arm-rockchip830-linux-uclibcgnueabihf-strip
load(qt_config)

添加编译配置文件
QT_Tools/qt-everywhere-src-5.12.12$ vi build.sh

#!/bin/bash
./configure -prefix /usr/local/Trolltech/QtEmbedded-5.12-arm \
-opensource \
-confirm-license \
-release \
-strip \
-shared \
-xplatform linux-arm-gnueabi-g++ \
-optimized-qmake \
-c++std c++11 \
--rpath=no \
-pch \
-skip qt3d \
-skip qtactiveqt \
-skip qtandroidextras \
-skip qtcanvas3d \
-skip qtdoc \
-skip qtconnectivity \
-skip qtdatavis3d \
-skip qtdoc \
-skip qtgamepad \
-skip qtlocation \
-skip qtmacextras \
-skip qtnetworkauth \
-skip qtpurchasing \
-skip qtremoteobjects \
-skip qtscript \
-skip qtscxml \
-skip qtsensors \
-skip qtspeech \
-skip qtsvg \
-skip qttools \
-skip qttranslations \
-skip qtwayland \
-skip qtwebengine \
-skip qtwebview \
-skip qtwinextras \
-skip qtx11extras \
-skip qtxmlpatterns \
-make libs \
-make examples \
-nomake tools -nomake tests \
-gui \
-widgets \
-dbus-runtime \
--glib=no \
--iconv=no \
--pcre=qt \
--zlib=qt \
-no-openssl \
--freetype=qt \
--harfbuzz=qt \
-no-opengl \
-linuxfb \
--xcb=no \

配置完成后，执行make && sudo make install安装到指定的目录。

luckfox@luckfox:~$ ls /usr/local/Trolltech/QtEmbedded-5.12-arm/
bin  doc  examples  include  lib  mkspecs  plugins  qml
luckfox@luckfox:~$ ls /usr/local/Trolltech/QtEmbedded-5.12-arm/bin/
canbusutil        moc           qdbusxml2cpp  qmake  qmlcachegen       qmllint  qmlpreview  qmltestrunner  rcc        uic
fixqt4headers.pl  qdbuscpp2xml  qlalr         qml    qmlimportscanner  qmlmin   qmlscene    qvkgen         syncqt.pl
luckfox@luckfox:~$
luckfox@luckfox:~$
luckfox@

将配置安装完成的QT环境移植到开发板中。
将lib 和 plugins 移植到开发板中，并配置启动参数。
新建存放QtEmbedded-5.12-arm的目录

luckfox@luckfox:~/workspace/luckfox-pico/output/out/rootfs_uclibc_rv1106$ mkdir -p usr/local/Trolltech/QtEmbedded-5.12-arm

将QtEmbedded-5.12-arm目录中的lib 和 plugins 目录拷贝到需要移植的目录中

:~/workspace/luckfox-pico/output/out/rootfs_uclibc_rv1106/usr/local/Trolltech/QtEmbedded-5.12-arm$ cp -rf /usr/local/Trolltech/QtEmbedded-5.12-arm/lib ./
:~/workspace/luckfox-pico/output/out/rootfs_uclibc_rv1106/usr/local/Trolltech/QtEmbedded-5.12-arm$ ls
lib
:~/workspace/luckfox-pico/output/out/rootfs_uclibc_rv1106/usr/local/Trolltech/QtEmbedded-5.12-arm$
:~/workspace/luckfox-pico/output/out/rootfs_uclibc_rv1106/usr/local/Trolltech/QtEmbedded-5.12-arm$
:~/workspace/luckfox-pico/output/out/rootfs_uclibc_rv1106/usr/local/Trolltech/QtEmbedded-5.12-arm$ cp -rf /usr/local/Trolltech/QtEmbedded-5.12-arm/plugins ./

配置相应的启动文件支持QT
~/workspace/luckfox-pico/output/out/rootfs_uclibc_rv1106$ vi etc/init.d/rcS

~/workspace/luckfox-pico/output/out/rootfs_uclibc_rv1106$ vi bin/qt5

#!/bin/sh

export QTDIR=/usr/local/Trolltech/QtEmbedded-5.12-arm
#set Lib PATH
export LD_LIBRARY_PATH=$QTDIR/lib:/usr/lib:$LD_LIBRARY_PATH
export QT_QPA_PLATFORM=linuxfb:fb=/dev/fb0
export QT_QPA_PLATFORM_PLUGIN_PATH=$QTDIR/plugins

export PATH=$QTDIR/bin:$PATH
export CAMERA_DEVICE=/dev/video3

#export QWS_KEYBOARD=TTY:/dev/tty1

export HOME=/root

/demo_qt5 &

添加执行权限

:~/workspace/luckfox-pico/output/out/rootfs_uclibc_rv1106$ chmod +x bin/qt5

拷贝例程测试是否能够运行QT程序
examples

打包rootfs镜像，烧写到SD卡中
打包前的镜像时间

luckfox@luckfox:~/workspace/luckfox-pico$ ls output/image/rootfs.img -l
-rw-rw-r-- 1 luckfox luckfox 82214912 12月 21 14:40 output/image/rootfs.img
luckfox@luckfox:~/workspace/luckfox-pico$ ./build.sh rootfs

cp -af /home/luckfox/workspace/luckfox-pico/sysdrv/source/busybox/busybox-1.27.2/_install/* /home/luckfox/workspace/luckfox-pico/sysdrv/out/rootfs_uclibc_rv1106
arm-rockchip830-linux-uclibcgnueabihf-gcc -march=armv7-a -mfpu=neon -mfloat-abi=hard -march=armv7-a -mfpu=neon -mfloat-abi=hard -Os io.c -o out/usr/bin/io

打包后的，单独打包不能生成rootfs.img

luckfox@luckfox:~/workspace/luckfox-pico$ ls output/image/rootfs.img -l
-rw-rw-r-- 1 luckfox luckfox 82214912 12月 21 14:40 output/image/rootfs.img
luckfox@luckfox:~/workspace/luckfox-pico$

需要
打包整个镜像：
~/luckfox-pico$ ./build.sh firmware
打包是将out目录下的文件夹打包，显示的命令如下：

mkfs.ext4 -d /home/luckfox/workspace/luckfox-pico/output/out/oem -r 1 -N 0 -m 5 -L "" -O ^64bit,^huge_file /home/luckfox/workspace/luckfox-pico/output/image/oem.img "1024M"
mkfs.ext4 -d /home/luckfox/workspace/luckfox-pico/output/out/rootfs_uclibc_rv1106 -r 1 -N 0 -m 5 -L "" -O ^64bit,^huge_file /home/luckfox/workspace/luckfox-pico/output/image/rootfs.img "2048M"
mkfs.ext4 -d /home/luckfox/workspace/luckfox-pico/output/out/userdata -r 1 -N 0 -m 5 -L "" -O ^64bit,^huge_file /home/luckfox/workspace/luckfox-pico/output/image/userdata.img "2048M"

需要打包整个固件才能够生成rootfs.img文件

luckfox@luckfox:~/workspace/luckfox-pico$ ls output/image/rootfs.img -l
-rw-rw-r-- 1 luckfox luckfox 123564032 12月 22 10:22 output/image/rootfs.img
luckfox@luckfox:~/workspace/luckfox-pico$

烧写rootfs.img文件到SD卡，启动开发板查看配置信息

# ls /usr/local/Trolltech/QtEmbedded-5.12-arm/
lib      plugins

调试方便编写一个运行QT脚本

# chmod +x runPrg

运行QT测试程序，支持QT开发

# ./runPrg
Qt Demo test
^C
#