Linux下交叉环境的编译Qt程序（Qt5，nvidia tx2，Ubuntu，arm）
1.linux主机准备qt的安装qtcreator 3.5.1 qt5.5.1g++的安装apt-get install g++安装opengl库apt-get install build-essential libgl1-mesa-dev2.安装交叉编译器下载交叉编译器gcc-linaro-7.5.0-2019.12-x86_64_aarch64-linux-gnu.tar.xz解压
1.linux主机准备
qt的安装
qtcreator 3.5.1 qt5.5.1g++的安装
apt-get install g++安装opengl库
apt-get install build-essential libgl1-mesa-dev2.安装交叉编译器
下载交叉编译器
gcc-linaro-7.5.0-2019.12-x86_64_aarch64-linux-gnu.tar.xz
解压
tar -zxvf gcc-linaro-7.5.0-2019.12-x86_64_aarch64-linux-gnu.tar.xz放到/opt目录下
cp -r gcc-linaro-7.5.0-2019.12-x86_64_aarch64-linux-gnu/ /opt/配置环境变量
nano /etc/profile
添加
export PATH=/opt/gcc-linaro-7.5.0-2019.12-x86_64_aarch64-linux-gnu/bin:$PATH生效source /etc/profile,或者重启
查看是否生效
aarch64-linux-gnu-g++ -v3.下载qt源码，编译出交叉编译版的qmake
qt官网download.qt.io/archive/qt/
例如下载qt5.9.1
Index of /archive/qt/5.9/5.9.1/single
(1) 在home下创建Qt5.9.1文件夹
mkdir /opt/Qt5.9.1
(2) 拷贝解压
tar xvzf qt-everywhere-opensource-src-5.9.1.tar.xz
(3) 修改
qtbase/mkspecs/linux-aarch64-gnu-g++/qmake.conf
修改如下：
#
# qmake configuration for building with aarch64-linux-gnu-g++
#
MAKEFILE_GENERATOR = UNIX
CONFIG += incremental
QMAKE_INCREMENTAL_STYLE = sublib
QT_QPA_DEFAULT_PLATFORM = linuxfb
QMAKE_CFLAGS_RELEASE += -O2 -march=armv8-a
QMAKE_CXXFLAGS_RELEASE += -O2 -march=armv8-a
include(../common/linux.conf)
include(../common/gcc-base-unix.conf)
include(../common/g++-unix.conf)
# modifications to g++.conf
QMAKE_CC = /opt/gcc-linaro-7.5.0-2019.12-x86_64_aarch64-linux-gnu/bin/aarch64-linux-gnu-gcc
QMAKE_CXX = /opt/gcc-linaro-7.5.0-2019.12-x86_64_aarch64-linux-gnu/bin/aarch64-linux-gnu-g++
QMAKE_LINK = /opt/gcc-linaro-7.5.0-2019.12-x86_64_aarch64-linux-gnu/bin/aarch64-linux-gnu-g++
QMAKE_LINK_SHLIB = /opt/gcc-linaro-7.5.0-2019.12-x86_64_aarch64-linux-gnu/bin/aarch64-linux-gnu-g++
# modifications to linux.conf
QMAKE_AR = /opt/gcc-linaro-7.5.0-2019.12-x86_64_aarch64-linux-gnu/bin/aarch64-linux-gnu-ar cqs
QMAKE_OBJCOPY = /opt/gcc-linaro-7.5.0-2019.12-x86_64_aarch64-linux-gnu/bin/aarch64-linux-gnu-objcopy
QMAKE_NM = /opt/gcc-linaro-7.5.0-2019.12-x86_64_aarch64-linux-gnu/bin/aarch64-linux-gnu-nm -P
QMAKE_STRIP = /opt/gcc-linaro-7.5.0-2019.12-x86_64_aarch64-linux-gnu/bin/aarch64-linux-gnu-strip
load(qt_config)
#houyawei 2022.4.26(4) 回到源码文件根目录下运行
sudo ./configure -prefix /opt/Qt5.9.1/ -release -linuxfb -opensource -optimized-qmake -xplatform linux-aarch64-gnu-g++ -no-opengl -skip qt3d -skip qtcanvas3d -nomake examples -skip qtdeclarative -no-iconv
(5) 在源码文件根目录下运行：(耗时较长)
sudo make
(6) 等待运行完，运行
make -j4
(7) 等待运行完，先在opt下创建Qt5.9.1文件夹，运行
sudo make install4.配置环境变量
(1)配置环境变量到/etc/profile
export QTEDIR=/opt/Qt5.9.1:$QTEDIR
export PATH=/opt/Qt5.9.1/bin:$PATH
export LD_LIBRARY_PATH=/opt/Qt5.9.1/lib: LD_LIBRARY_PATH
(2) source /etc/profile ，或者重启
(3)检验qmake的版本
输入 qmke -v 查看是否在opt/Qt5.9.1下5.配置qt creator
此处有坑，可尝试重启Linux主机或者重启软件，并注意以下配置
6.编译运行
不能直接在Linux主机上运行，可使用file对比查看x86_64,arm_64编译出的可执行文件格式。
程序移动到tx2上，运行正常。
其它的一些问题
1）tx2上缺少库error while loading shared libaries:libqt5charts
apt seatch xxxxx（根据关键字找准确的库名）
apt-get install 库名2）fatal error: sqlite3.h: No such file or directory
linux 主机可直接安装
sudo apt-get install sqlite3
sudo apt-get install libsqlite3-dev使用交叉编译时仍找不到，把头文件放到交叉编译环境即可，例如
cp /usr/include/sqlite3.h /opt/gcc-linaro-7.5.0-2019.12-x86_64_aarch64-linux-gnu/aarch64-linux-gnu/libc/usr/include/3）编译时出错
toolchain.prf(50): system(execute) requires one or two arguments.
下面方法测试有效
In file mkspecs/features/default_pre.prf I commented last line "load(toolchain)"参考链接：
Linux下的Qt环境搭建(arm交叉编译)_xflySnail的博客-CSDN博客_qt交叉编译armLinux下的Qt环境搭建(arm交叉编译）Qt环境安装应用安装gl库安装交叉编译器配置交叉编译器到qtcreator创建应用编译运行设置成开机自启动注意：本文软件环境为在虚拟机里搭建的ubuntu-14.04.5-desktop-amd64.iso，虚拟机版本VMware-workstation-full-9.0.0，如果链接中内容发生迁移无法下载可留下联系方式，虚拟机系统安装过程本文不做讲解...
https://blog.csdn.net/u012902367/article/details/87876079?ops_request_misc=%257B%2522request%255Fid%2522%253A%2522165093461216780357217121%2522%252C%2522scm%2522%253A%252220140713.130102334..%2522%257D&request_id=165093461216780357217121&biz_id=0&utm_medium=distribute.pc_search_result.none-task-blog-2~all~baidu_landing_v2~default-4-87876079.142%5Ev9%5Econtrol,157%5Ev4%5Econtrol&utm_term=qt%E4%BA%A4%E5%8F%89%E7%BC%96%E8%AF%91&spm=1018.2226.3001.4187 toolchain.prf(50): system(execute) requires one or two arguments. | Qt Forum@titan83 - usualy it's when you've configured your compiler path to gcc instead of g++. You can try to check that and uncomment (get back) your line at the end of default_pre.prf file. I wonder if it help?
https://forum.qt.io/topic/83153/toolchain-prf-50-system-execute-requires-one-or-two-arguments/4
//houyawei 2022.4.26
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