x86 architecture ubuntu builds arm64 cross-compilation environment and QT compilation arm64 architecture project

Background: Since recent projects require domestic system adaptation, a lot of software needs to be recompiled to adapt to CPUs of different architectures.

environment:

1. Host win10 64bit vmware virtual host ubuntu1804 64bit

2. The vmware virtual host has installed qt5.14.2 and qt_create4.11.1

1. Cross-compilation of C/C++ programs

1. Cross-compilation environment construction

①Select the compilation tool aarch64-linux-gnu

②Install cross-compilation tools

sudo apt-get install gcc-aarch64-linux-gnu g++-aarch64-linux-gnu

After installation, verify whether it is ok. Directly enter aarch64- and press the Tab key. If it can automatically complete aarch64-linux-gnu-gcc, then there is no problem. Check the version information: aarch64-linux-gnu-gcc -v, you can find the following As shown in the figure, the installation is complete.

aarch64-linux-gnu-gcc -v

 2. Compile source code

For example, you need to compile the test.c source code into an arm64 executable file. The instructions are as follows:

aarch64-linux-gnu-gcc -o test test.c

After the compilation is passed, use the file command to check whether the file type is ELF: 64bit LSB shared object, ARM aarch64... If so, the source code compilation is completed.

3. QT builds arm64 compilation environment

①Download qt-everywhere-src-5.14.2.tar.xz, and use the xz command to decompress the qt-everywhere-src-5.14.2.tar file, and then use the tar command to decompress qt-everywhere-src-5.14.2. tar file and get the folder: qt-everywhere-src-5.14.2

xz -d qt-everywhere-src-5.14.2.tar.xz

tar -xvf qt-everywhere-src-5.14.2.tar

Check whether the compiler in the linux-aarch64-gnu-g++/qmake.conf configuration file in qt-everywhere-src-5.14.2/qtbase/mkspecs is aarch64-linux-gnu- If not, it needs to be modified to the corresponding cross-compilation Tool name, as shown below:

 ②Enter the source code root directory: cd qt-everywhere-src-5.14.2

./configure -prefix /opt/Qt5.14.2/5.14.2/aarch64 -make libs -xplatform linux-aarch64-gnu-g++ -no-opengl -skip qtdeclarative

illustrate:

- no-opengl is because the interface version of qt has been installed before

-skip qtdeclarative is a compilation problem and is temporarily skipped.

③Compile make -j16 2>&1 | tee build.log. Note that some lisence options will be entered during compilation. Just choose open source.

④Installation

Because the path specified during configuration is /opt/Qt5.14.2/5.14.2/aarch64, you need to create the aarch64 folder first and then install it. After the installation is completed, the corresponding folder will be generated in the /opt/Qt5.14.2/5.14.2/aarch64 path.

sudo mkdir -p /opt/Qt5.14.2/5.14.2/aarch64

sudo make install

⑤QT configuration option modification

After Compliers has installed the cross-compilation tool, the system can automatically find it. If it cannot be found, you need to add it yourself through the Add button.

Qt Versions needs to add a customized version, qmake needs the newly compiled and installed qmake

Kits need to select their newly added Qt Version

 ⑥Project creation and compilation

Once the above preparations are ready, you can open or create a new QT project. To build and run, select aarch64 to build the project. Compile to obtain the QT application required by arm64, provide a guide to the arm64 host, and run tests.