Problem with meta-toolchain-qt6

Hello,
I've built yocto's dunfell with meta-qt6 branch 6.2; after the image creation I've built sdk for qtcreator configuration.
Using the sdk created (both intel64 and rpi4-64) I'm trying to build the Qml Video Shader Effects Example but I cannot build the project it report this:

/opt/rpi64/qt620/sysroots/x86_64-pokysdk-linux/usr/share/cmake-3.16/Modules/CMakeTestCXXCompiler.cmake:53: error: The C++ compiler "/opt/rpi64/qt620/sysroots/x86_64-pokysdk-linux/usr/bin/aarch64-poky-linux/aarch64-poky-linux-g+" is not able to compile a simple test program. It fails with the following output: Change Dir: /home/enricopelo/Qt/Examples/Qt-6.2.0/multimediawidgets/build-player-rpi4_Qt6_2_0-Debug/CMakeFiles/CMakeTmp Run Build Command(s):/home/enricopelo/Qt/Tools/Ninja/ninja cmTC_9a098 && [1/2] Building CXX object CMakeFiles/cmTC_9a098.dir/testCXXCompiler.cxx.o [2/2] Linking CXX executable cmTC_9a098 FAILED: cmTC_9a098 : && /opt/rpi64/qt620/sysroots/x86_64-pokysdk-linux/usr/bin/aarch64-poky-linux/aarch64-poky-linux-g+ CMakeFiles/cmTC_9a098.dir/testCXXCompiler.cxx.o -o cmTC_9a098 && : /opt/rpi64/qt620/sysroots/x86_64-pokysdk-linux/usr/libexec/aarch64-poky-linux/gcc/aarch64-poky-linux/9.3.0/real-ld: cannot find Scrt1.o: No such file or directory /opt/rpi64/qt620/sysroots/x86_64-pokysdk-linux/usr/libexec/aarch64-poky-linux/gcc/aarch64-poky-linux/9.3.0/real-ld: cannot find crti.o: No such file or directory /opt/rpi64/qt620/sysroots/x86_64-pokysdk-linux/usr/libexec/aarch64-poky-linux/gcc/aarch64-poky-linux/9.3.0/real-ld: cannot find crtbeginS.o: No such file or directory /opt/rpi64/qt620/sysroots/x86_64-pokysdk-linux/usr/libexec/aarch64-poky-linux/gcc/aarch64-poky-linux/9.3.0/real-ld: cannot find -lstdc++ /opt/rpi64/qt620/sysroots/x86_64-pokysdk-linux/usr/libexec/aarch64-poky-linux/gcc/aarch64-poky-linux/9.3.0/real-ld: cannot find -lm /opt/rpi64/qt620/sysroots/x86_64-pokysdk-linux/usr/libexec/aarch64-poky-linux/gcc/aarch64-poky-linux/9.3.0/real-ld: cannot find -lgcc_s /opt/rpi64/qt620/sysroots/x86_64-pokysdk-linux/usr/libexec/aarch64-poky-linux/gcc/aarch64-poky-linux/9.3.0/real-ld: cannot find -lgcc /opt/rpi64/qt620/sysroots/x86_64-pokysdk-linux/usr/libexec/aarch64-poky-linux/gcc/aarch64-poky-linux/9.3.0/real-ld: cannot find -lc /opt/rpi64/qt620/sysroots/x86_64-pokysdk-linux/usr/libexec/aarch64-poky-linux/gcc/aarch64-poky-linux/9.3.0/real-ld: cannot find -lgcc_s /opt/rpi64/qt620/sysroots/x86_64-pokysdk-linux/usr/libexec/aarch64-poky-linux/gcc/aarch64-poky-linux/9.3.0/real-ld: cannot find -lgcc /opt/rpi64/qt620/sysroots/x86_64-pokysdk-linux/usr/libexec/aarch64-poky-linux/gcc/aarch64-poky-linux/9.3.0/real-ld: cannot find crtendS.o: No such file or directory /opt/rpi64/qt620/sysroots/x86_64-pokysdk-linux/usr/libexec/aarch64-poky-linux/gcc/aarch64-poky-linux/9.3.0/real-ld: cannot find crtn.o: No such file or directory collect2: error: ld returned 1 exit status ninja: build stopped: subcommand failed.

there something missing in the image/sdk creation?

Best regards
Enrico