ARM QT Cross-Compiling

I. Installing the cross compiler

I now use here is the Huawei Hers series arm-hisiv500-linux aarch64-himix100-linux Hi3519AV100 chip.

1. Unzip the cross compiler compression package
2. Execute the installation script with the suffix install, such as aarch64-himix100-linux.install. Different series of cross compilers will be installed in the default directory /opt/hisi-linux/x86-arm, according to The name of the series is distinguished.

[root@test ]# ll /opt/hisi-linux/x86-arm/
total 8
drwxr-xr-x. 12 520 520 4096 Aug 22 13:55 aarch64-himix100-linux
drwxr-xr-x. 10 520 520 4096 Aug 22 13:44 arm-hisiv500-linux

3. Configure the environment variables. The HiSilicon chip automatically configures the cross-compiler and configures the environment variables. You do not need to manually configure it yourself. If not configured, you need to change the /etc/profile file and add environment variables at the end, such as:

export PATH="/opt/hisi-linux/x86-arm/aarch64-himix100-linux/bin:$PATH"

Then, execute the following command to make it effective:

source /etc/profile

II. Download QT

1. Go to the official website to download the QT source code of your required version:
   http://download.qt.io/archive/qt/
   The QT version I used is 4.8.7
   http://download.qt.io/archive/qt/4.8/4.8.7/qt-everywhere-opensource-src-4.8.7.tar.gz
2. Unzip

tar -zxvf qt-everywhere-opensource-src-4.8.7.tar.gz

3. Enter the directory

cd qt-everywhere-opensource-src-4.8.7

III. Configuring QT

1. Configure the qmake.conf configuration file, first copy a template configuration file for customization:

cp -r ./mkspecs/qws/linux-arm-g++ ./mkspecs/qws/linux-himix100-g++

Edit the configuration file:

gedit ./mkspecs/qws/linux-himix100-g++/qmake.conf

Replace arm-linux with the corresponding compiler, such as aarch64-himix100-linux. Finally, the entire file looks like this:

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

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

# modifications to g++.conf
QMAKE_CC                = aarch64-himix100-linux-gcc
QMAKE_CXX               = aarch64-himix100-linux-g++
QMAKE_LINK              = aarch64-himix100-linux-g++
QMAKE_LINK_SHLIB        = aarch64-himix100-linux-g++

# modifications to linux.conf
QMAKE_AR                = aarch64-himix100-linux-ar cqs
QMAKE_OBJCOPY           = aarch64-himix100-linux-objcopy
QMAKE_STRIP             = aarch64-himix100-linux-strip

load(qt_config)

2. configure
   1). 32-bit cross compiler configuration such as arm-hisiv500-linux and Hi3519AV100:

./configure -opensource -confirm-license -embedded arm -nomake examples -nomake demos -nomake docs -xplatform qws/linux-hisiv500-g++ -prefix /usr/local/Trolltech/QtEmbedded-4.8.7-arm_x32

Among them, qws/linux-hisiv500-g++ needs to be modified according to different compilers.
The installation directory /usr/local/Trolltech/QtEmbedded-4.8.7-arm_x32 can also be customized as needed. The default installation directory is /usr/local/Trolltech/, and the name is automatically named according to the Qt version and compiler architecture.

2. configure
   2). aarch64-himix100-linux 64-bit cross compiler configuration:

./configure -opensource -confirm-license -qt-sql-sqlite -qt-gfx-linuxfb -plugin-sql-sqlit -no-qt3support -no-phonon -no-svg -no-webkit -no-javascript-jit -no-script -no-scripttools -no-declarative -no-declarative-debug -qt-zlib -no-gif -qt-libtiff -qt-libpng -no-libmng -qt-libjpeg -no-rpath -no-pch -no-3dnow -no-avx -no-neon -no-openssl -no-nis -no-cups -no-dbus -embedded arm -platform linux-g++ -little-endian -qt-freetype -no-opengl -no-glib -nomake demos -nomake examples -nomake docs -xplatform qws/linux-himix100-g++ -prefix /usr/local/Trolltech/QtEmbedded-4.8.7-arm_x64

Similarly, qws/linux-himix100-g++ needs to be modified according to different compilers.
The installation directory /usr/local/Trolltech/QtEmbedded-4.8.7-arm_x64 can also be defined as needed. The default installation directory is /usr/local/Trolltech/, and the name is automatically named according to the Qt version and the compiler architecture.

IV. 64-bit compiler extra configuration:

1. Edit the q_atomic_swp.h header file to resolve the assembly swap error at compile time.

gedit ./src/corelib/arch/qatomic_armv5.h

Modify the q_atomic_swp function to:

inline char q_atomic_swp(volatile char *ptr, char newval)
{
    register char ret;

    /*asm volatile("swpb %0,%2,[%3]"
    : "=&r"(ret), "=m" (*ptr)
    : "r"(newval), "r"(ptr)
    : "cc", "memory");*/

    ret=*ptr;

    *ptr=newval;

    return ret;
}

2. Modify itemviews.cpp line 396 to resolve compilation errors: error: invalid conversion frome 'int' to

vi src/plugins/accessible/widgets/itemviews.cpp +396

After modification, it is:

view()->selectionModel()->select(index, QItemSelectionModel::SelectionFlags( QItemSelectionModel::Columns & QItemSelectionModel::Deselect ));

V. Compile and install

Compile

gmake -j8

2. Installation

gmake install

VI. Configuring Qt Creator

Configured in the toolbar Tools->Options->Build & Run tab, there is no explanation here, as shown in the figure:

Reference：

https://doc.qt.io/archives/qt-4.8/qt-embedded-crosscompiling.html
https://blog.csdn.net/yfkyfk521/article/details/89446969