missing source code of examples when build qt6 from source on linux

qqtang

Introduction

I've try to build qt6 from source on an aarch64 linux desktop device, which is not provided by qt-online-installer. So I try to build it on an x86_64 linux in advanced for experimental purpose. However, I found some this wired things on ubuntu20.04, that is, the examples are not shown on the Welcome page on qt creator(10.0.0):

Reproduction

System Information

linux: ubuntu 20.04
arch: x86_64
qt source code: 6.5.0
qt creator: 10.0.0
hardware: VM, 32cores CPU@2.4GHz

Qt libs and tools

The dependencies are resolved according to official posts.

build commands:

# configure
cd ~
tar -xf qt-everywhere-src-6.5.0.tar.xz && mv qt-everywhere-src-6.5.0 qt6src
mkdir qt6build && cd qt6build
rm CMakeCache.txt && ../qt6src/configure \
-prefix /opt/qt/6.5.0 \
-make examples \
-skip qtwebengine,qtwayland \
-xcb -xcb-xlib -bundled-xcb-xinput -qpa xcb \
-qt-zlib -qt-libjpeg -qt-libpng -qt-freetype -qt-pcre -qt-harfbuzz # and some sql-drivers configurations are ignored as I think it won't affect this phenomenons  :)
# build
cmake --build . --parallel
# install
cmake --install .

Qt docs

The dependencies are resolved according to official posts.

build commands:

# build
cmake --build . --target docs --parallel
# install
cmake --build . --target install_docs --parallel

Results

du -sh /opt/qt/6.5.0/:

947M	/opt/qt/6.5.0/

du -sh /opt/qt/6.5.0/*

35M	/opt/qt/6.5.0/bin
443M	/opt/qt/6.5.0/doc
105M	/opt/qt/6.5.0/examples
52M	/opt/qt/6.5.0/include
213M	/opt/qt/6.5.0/lib
15M	/opt/qt/6.5.0/libexec
12M	/opt/qt/6.5.0/metatypes
3.5M	/opt/qt/6.5.0/mkspecs
556K	/opt/qt/6.5.0/modules
320K	/opt/qt/6.5.0/phrasebooks
22M	/opt/qt/6.5.0/plugins
36M	/opt/qt/6.5.0/qml
14M	/opt/qt/6.5.0/translations

tree /opt/qt/6.5.0/examples/

tree /opt/qt/6.5.0/examples/
/opt/qt/6.5.0/examples/
├── assistant
│   ├── remotecontrol
│   │   └── remotecontrol
│   └── simpletextviewer
│       └── simpletextviewer
 <collapsed>
└── xml
    ├── dombookmarks
    │   └── dombookmarks
    ├── rsslisting
    │   └── rsslisting
    └── streambookmarks
        └── streambookmarks

742 directories, 599 files

Question

Examples that can be open in Qt Creator are critical important for Qt beginners and currently the qt(community version) I built is not perfect :(
I wonder that if there is any hero can point out why examples folders has no project files but compiled binary executable file instead.

Regards

Thx and looking forward for professional opinons :)

Appendix

build-log.tar.xz: for more compile details.
- size:
  - compressed: 2MB
  - extracted: 184MB
- files:
  - build.ninja
  - config.summary
  - CMakeFiles/*