Search for GuiPrivate package with Qt 6.10

[nicolasfella]

Qt 6.10 extracts the private modules into a separate CMake package, so search for it

See https://bugreports.qt.io/browse/QTBUG-87776

[MhmRhm]

I can see the issue with latest qt.6.10.1. I have also checked out master branch in my build directory and still see the issue:

CMake Error at /home/mohammad/vcpkg/scripts/buildsystems/vcpkg.cmake:908 (_find_package):
  Found package configuration file:

    /home/mohammad/Qt/6.10.1/gcc_arm64/lib/cmake/Qt6/Qt6Config.cmake

  but it set Qt6_FOUND to FALSE so package "Qt6" is considered to be NOT
  FOUND.  Reason given by package:

  Failed to find required Qt component "GuiPrivate".

  Expected Config file at
  "/home/mohammad/Qt/6.10.1/gcc_arm64/lib/cmake/Qt6GuiPrivate/Qt6GuiPrivateConfig.cmake"
  exists



  Configuring with --debug-find-pkg=Qt6GuiPrivate might reveal details why
  the package was not found.

   find_package search path values and other context for the last package that was not found:
    CMAKE_MODULE_PATH: /home/mohammad/Documents/Processing/cmake;/home/mohammad/Qt/6.10.1/gcc_arm64/lib/cmake/Qt6;/home/mohammad/Qt/6.10.1/gcc_arm64/lib/cmake/Qt6/3rdparty/extra-cmake-modules/find-modules;/home/mohammad/Qt/6.10.1/gcc_arm64/lib/cmake/Qt6/3rdparty/kwin;/home/mohammad/Qt/6.10.1/gcc_arm64/lib/cmake/Qt6;/home/mohammad/Qt/6.10.1/gcc_arm64/lib/cmake/Qt6/3rdparty/extra-cmake-modules/find-modules;/home/mohammad/Qt/6.10.1/gcc_arm64/lib/cmake/Qt6/3rdparty/kwin;/home/mohammad/Qt/6.10.1/gcc_arm64/lib/cmake/Qt6;/home/mohammad/Qt/6.10.1/gcc_arm64/lib/cmake/Qt6/3rdparty/extra-cmake-modules/find-modules;/home/mohammad/Qt/6.10.1/gcc_arm64/lib/cmake/Qt6/3rdparty/kwin
    CMAKE_PREFIX_PATH: /home/mohammad/Documents/Processing-build-linux-default-release/vcpkg_installed/arm64-linux;/home/mohammad/Documents/Processing-build-linux-default-release/vcpkg_installed/arm64-linux/debug;/home/mohammad/Qt/6.10.1/gcc_arm64
    $ENV{CMAKE_PREFIX_PATH}: 
    CMAKE_FIND_ROOT_PATH: /home/mohammad/Documents/Processing-build-linux-default-release/vcpkg_installed/arm64-linux;/home/mohammad/Documents/Processing-build-linux-default-release/vcpkg_installed/arm64-linux/debug
    _qt_additional_packages_prefix_paths: 
    _qt_additional_host_packages_prefix_paths: 
    _qt_cmake_dir: /home/mohammad/Qt/6.10.1/gcc_arm64/lib/cmake
    QT_HOST_PATH: 
    Qt6HostInfo_DIR: 
    Qt6_DIR: /home/mohammad/Qt/6.10.1/gcc_arm64/lib/cmake/Qt6
    CMAKE_TOOLCHAIN_FILE: /home/mohammad/vcpkg/scripts/buildsystems/vcpkg.cmake
    CMAKE_FIND_ROOT_PATH_MODE_PACKAGE: 
    CMAKE_SYSROOT: 
    $ENV{PATH}: /usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games

Call Stack (most recent call first):
  /home/mohammad/Documents/Processing-build-linux-default-release/_deps/qxlsx-src/QXlsx/CMakeLists.txt:22 (find_package)