1. Built Qt with:

   -platform linux-clang -sanitize fuzzer-no-link
   

   See attached config.opt and config.summary.

2. Tried building a project with that.

   ~/dev/clang-14.0.0/qt-dev_12.15-base_imageformats_svg-fasan-qt-tiff/qtbase/bin/qt-cmake ~/dev/src/qtbase/tests/libfuzzer/gui/image/qimage/loadfromdata/
   

   This fails with an error message:

   CMake Error at /home/qtrob/dev/clang-14.0.0/qt-dev_12.15-base_imageformats_svg-fasan-qt-tiff/qtbase/lib/cmake/Qt6/3rdparty/extra-cmake-modules/modules/ECMEnableSanitizers.cmake:101 (message):
     You ask to enable the sanitizer fuzzer-no-link,
   
             but your compiler GNU version 11.4.0
             does not support it !
             You should use at least GCC 99.99, Clang 6.0
             or MSVC 99.99
             (99.99 means not implemented yet)
   Call Stack (most recent call first):
     /home/qtrob/dev/clang-14.0.0/qt-dev_12.15-base_imageformats_svg-fasan-qt-tiff/qtbase/lib/cmake/Qt6/3rdparty/extra-cmake-modules/modules/ECMEnableSanitizers.cmake:136 (check_compiler_version)
     /home/qtrob/dev/clang-14.0.0/qt-dev_12.15-base_imageformats_svg-fasan-qt-tiff/qtbase/lib/cmake/Qt6/3rdparty/extra-cmake-modules/modules/ECMEnableSanitizers.cmake:154 (enable_sanitizer_flags)
     /home/qtrob/dev/clang-14.0.0/qt-dev_12.15-base_imageformats_svg-fasan-qt-tiff/qtbase/lib/cmake/Qt6/Qt6Config.cmake:110 (include)
     CMakeLists.txt:13 (find_package)
   

   It's correct that gcc 11.4.0 does not support fuzzer-no-link but that's irrelevant. Qt is configured with clang 14 and should use that.

The command should just configure the project so it can be built. This used to work with earlier versions of Qt.