Jetson Nano. QtWebView error.

[Daniel Gonzalez]

I need to install QWebEngine library of pyqt5 in my Jetson Nano 4gb. I tryed to follow many toturials, but it was imposible for me. I installed pyqt5 but the qwebEngineView was imposible. Any of you have got the same problem.? Anyone can help me?
The tutorial in which I came closest to installing it was:
This build Qt procedure based on PhysicsX description: QTonRaspberryPi/QtJetsonNano5.15.0 at main · PhysicsX/QTonRaspberryPi · GitHub

As target OS was used Ubuntu 18.04.5 LTS (bionic)

Probably upgrade to 20.04.4 LTS will need to install less packages number.

To build was used Linaro Cross Compiler Toolchain in version 5.5.0

Instal extra packages on target system: ffmpeg flex fontconfig libavcodec-dev libavformat-dev libavutil-dev libc6-dev libdbus-1-dev libexpat1 libexpat1-dev libfreetype6-dev libglib2.0-dev libgstreamer-plugins-base1.0-dev libgstreamer1.0-dev
libicu-dev libinput-dev libjpeg-dev libmtdev-dev libnss3-dev libopus-dev libpng-dev libpthread-workqueue-dev libpulse-dev libqt5multimedia5-plugins libre2-dev libssl-dev libssl1.0-dev libwebp-dev
libx11-dev libx11-xcb-dev libxext-dev libxfixes-dev zlib1g-dev

Instal extra packages on host system: flex ninja-build libclang-dev libnss3-dev

Change two files chromium-browser sources to propertly compiling QtWebEngine:

Add two lines (marked by +) in file qt-everywhere-src-5-15-0/qtwebengine/src/3rdparty/chromium/third_party/libvpx/BUILD.gn near to line 343:
} else if (current_cpu == “arm64”) {
if (is_chromeos || is_win ) {
sources=libpvx_src_arm64_highbd
} else {
configs -= [ "//build/config/compiler:default_symbols" ]
configs += [ "//build/config/compiler:no_symbols" ]
sources = libpvx_srcs_arm64
}
}
Make changes in file qt-everywhere-src-5-15-0/qtwebengine/src/3rdparty/chromium/v8/src/codegen/arm64/macro-assembler-arm64.h:
a) comment line 1973:
// DISALOW_IMPLICIT_CONSTRUCTORS(MacroAssembler);
b) change and add (+) lines from line 162:
// using TurboAssemblerBase::TurboAssemblerBase;
TurboAssembler(Isolateisolate, CodeObjectRequired create_code_object,
std::unique_ptr<AssemblerBuffer> buffer = {} )
: TurboAssemblerBase(isolate, create_code_object, std::move(buffer)){}
TurboAssembler(Isolateisolate, const AssemblerOptions& options,
CodeObjectRequired create_code_object,
std::unique_ptr<AssemblerBuffer> buffer = {} )
: TurboAssemblerBase(isolate, options, create_code_object, std::move(buffer)){}
c) change and add (+) lines from line 1426:
// using TurboAssembler::TurboAssembler;

MacroAssembler(Isolateisolate, CodeObjectRequired create_code_object,
std::unique_ptr<AssemblerBuffer> buffer = {} )
: TurboAssembler(isolate, create_code_object, std::move(buffer)){}
MacroAssembler(Isolateisolate, const AssemblerOptions& options,
CodeObjectRequired create_code_object,
std::unique_ptr<AssemblerBuffer> buffer = {} )
: TurboAssembler(isolate, options, create_code_object, std::move(buffer)){}
Add line:
QMAKE_LIBDIR_OPENGL[_ES2]=$$[SYSROOT]/usr/lib/aarch64-linux-gnu/tegra-egl
and change line:
EGLSFS_DEVICE_INTEGRATION=eglfs_x11
in file qt-everywhere-src-5-15-0/qtbase/mkspec/devices/linux-jetson-nano/qmake.conf.

Remove options -skip qtwebengine from configure command line. My command looks like:
…/qt-everywhere-src-5.15.0/configure -opengl es2 -device linux-jetson-nano -device-option CROSS_COMPILE=/opt/qt5jnano/gcc-linaro-5.5.0-2017.10-x86_64_aarch64-linux-gnu/bin/aarch64-linux-gnu- -sysroot /opt/qt5jnano/sysroot -prefix /usr/local/qt5.15.0 -opensource -confirm-license -skip qtscript -skip wayland -force-debug-info -skip qtdatavis3d -skip location -nomake examples -make libs -pkg-config -no-use-gold-linker -v

Note: Machine’s with many cpu cores and small RAM size can often make memory error. After that you can reinvoke compile process again.
To prevent this limit number of cores or use computer with large RAM memory size.

Note: Read my config.summary to check witch modules and libraries should be use to compile Qt.

But at the end. It fail in a few libraries?

[Daniel Gonzalez]

is it there any incompatibility between Jetson Nano Hardware/Sofware and qtWebView? (aarch64+Ubuntu 18.04)

Thanks for your answers.