Qt6 Static build for macOS problem: Undefined symbols for architecture x86_64 and issues with libraries linking.

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Hi all

I have some issues while compiling QML project (qmake) under Qt6 Static build. The compilations process exits with code 2 and reporting "Undefined symbols for architecture x86_64".

Further analisys of compile output shows number of issues, which seems to be libraries/plugins linking to Static build:

*Undefined symbols for architecture x86_64:
  "qml_register_types_QtQuick_Layouts()", referenced from:
      qt_plugin_instance_QtQuickLayoutsPlugin() in libqquicklayoutsplugin.a(plugin.cpp.o)
  "qml_register_types_Qt_labs_settings()", referenced from:
      qt_plugin_instance_QmlSettingsPlugin() in libqmlsettingsplugin.a(plugin.cpp.o)
...
...
...
libqtvirtualkeyboard_pinyin.a(pinyindecoderservice.cpp.o)
  "_im_set_max_lens", referenced from:
      QtVirtualKeyboard::PinyinDecoderService::setLimits(int, int) in libqtvirtualkeyboard_pinyin.a(pinyindecoderservice.cpp.o)
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make: *** [ATU_connect.app/Contents/MacOS/ATU_connect] Error 1
21:53:54: The process "/usr/bin/make" exited with code 2.
Error while building/deploying project ATU_connect (kit: 6.1.0_static)
When executing step "Make"*

I have tested (with the same resuilt) on Static builds of Qt versions 6.0.3 and 6.1.0-beta3 and under Xcode 12.0 and 12.4.

full compile output log attached
static configuration log attached

Edit:
Logs seems to be not attaching to the post. Those can be found here:
Compile output log: http://vk6nx.net/files/compile_output.txt
Static config log: http://vk6nx.net/files/configuration.txt

Static Build environment:
macOS Catalina 10.15.17

Static Build Qt versions:
6.0.3 and 6.1.0-beta3

Xcode environment
Xcode_12.4
Command_Line_Tools_for_Xcode_12.4

% xcode-select -print-path
/Applications/Xcode.app/Contents/Developer

% xcrun -sdk macosx -find clang
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang

% xcrun -sdk macosx --show-sdk-path
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX11.1.sdk

Static Build system:
ninja

Please note that the same application is successfully compiling under following dynamic Qt versions: 6.0.3, 6.1.0-beta3 and static Qt version 5.15.2.

Please note: if Static (6.0.3 or 6.1.0-beta3) is build with configuration key -shared, then application is successfully compiling (but, obviously, it is non static application).

Any suggestions would be really appreciated.

Thanks in advance.

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FYI
After further steps ithe issue was recognised as the bug.

Fix:
https://bugreports.qt.io/browse/QTBUG-93021