cmake warnings in qtquick3d: frostedGlass shader resource

$ ../qt6/configure -developer-build -debug -no-optimize-debug -no-tslib -no-pch -nomake examples
...
Configuring submodule 'qtquick3d'
-- CMAKE_BUILD_TYPE was set to: 'Debug'
-- Running syncqt for module: 'QtQuick3DUtils' 
-- Running syncqt for module: 'QtQuick3DAssetImport' 
-- Running syncqt for module: 'QtQuick3DRuntimeRender' 
-- Running syncqt for module: 'QtQuick3D' 
-- Running syncqt for module: 'QtQuick3DParticles' 
-- Running syncqt for module: 'QtQuick3DAssetUtils' 
-- Found WrapQuick3DAssimp: TRUE (Required is at least version "5.1.6") 
-- Performing Test Assimp
-- Performing Test Assimp - Success
-- Running syncqt for module: 'QtQuick3DHelpers' 
-- Running syncqt for module: 'QtQuick3DIblBaker' 
-- Running syncqt for module: 'QtQuick3DGlslParser' 
-- Tool 'Qt6::balsam' will be built from source.
-- Tool 'Qt6::balsamui' will be built from source.
-- Tool 'Qt6::meshdebug' will be built from source.
-- Tool 'Qt6::shadergen' will be built from source.
-- Tool 'Qt6::instancer' will be built from source.
-- Tool 'Qt6::shapegen' will be built from source.
-- Tool 'Qt6::materialeditor' will be built from source.
CMake Warning at /home/rutledge/dev/qt6-dbg/qtbase/lib/cmake/Qt6Qml/Qt6QmlMacros.cmake:460 (message):
  Neither RESOURCE_PREFIX nor AUTO_RESOURCE_PREFIX are specified for
  materialeditor.  The resource root directory, ':/', is used as prefix.  If
  this is what you want, specify '/' as RESOURCE_PREFIX.  The recommended
  resource directory to be used as prefix is ':/qt/qml/'.  Specify
  AUTO_RESOURCE_PREFIX to use it.
Call Stack (most recent call first):
  /home/rutledge/dev/qt6-dbg/qtbase/lib/cmake/Qt6Qml/Qt6QmlMacros.cmake:695 (qt6_add_qml_module)
  qtquick3d/tools/materialeditor/CMakeLists.txt:60 (qt_add_qml_module)


assets/shaders/frostedGlass.frag -> assets/shaders/frostedGlass.frag.qsb exposed as ://assets/shaders/frostedGlass.frag.qsb
CMake Warning at /home/rutledge/dev/qt6-dbg/qtbase/lib/cmake/Qt6Qml/Qt6QmlMacros.cmake:460 (message):
  Neither RESOURCE_PREFIX nor AUTO_RESOURCE_PREFIX are specified for
  tst_qquick3dbuffermanager.  The resource root directory, ':/', is used as
  prefix.  If this is what you want, specify '/' as RESOURCE_PREFIX.  The
  recommended resource directory to be used as prefix is ':/qt/qml/'.
  Specify AUTO_RESOURCE_PREFIX to use it.
Call Stack (most recent call first):
  qtquick3d/tests/auto/quick3d_visual/buffermanager/CMakeLists.txt:34 (qt6_add_qml_module)