I am using QT version 6.8.1 and i installed sources too. Also i am using MySQL Server 8.0 and installed MySQL Connector C 6.1 and copied libmysql.dll file to C:Qt6.8.1mingw_64bin still the error the same.So, I followed a video on youtube to build the driver using cmd first setting PATH then using this command: call C:Qt6.8.1mingw_64binqt-cmake.bat -G “MinGW Makefiles” . -DMySQL_INCLUDE_DIR=”C:Program FilesMySQLMySQL Server 8.0include” -DMySQL_LIBRARY=”C:Program FilesMySQLMySQL Server 8.0liblibmysql.lib” -DCMAKE_INSTALL_PREFIX=”C:Qt6.8.1mingw_64″ -DCMAKE_C_COMPILER=”gcc.exe” -DCMAKE_CXX_COMPILER=”g++.exe” But this results some warning and errors.

the result: — The CXX compiler identification is GNU 6.3.0
— The C compiler identification is GNU 6.3.0
— The ASM compiler identification is GNU
— Found assembler: C:/MinGW/bin/gcc.exe
— Detecting CXX compiler ABI info
— Detecting CXX compiler ABI info – done
— Check for working CXX compiler: C:/MinGW/bin/g++.exe – skipped
— Detecting CXX compile features
— Detecting CXX compile features – done
— Detecting C compiler ABI info
— Detecting C compiler ABI info – done
— Check for working C compiler: C:/MinGW/bin/gcc.exe – skipped
— Detecting C compile features
— Detecting C compile features – done
CMake Warning at C:/Qt/6.8.1/mingw_64/lib/cmake/Qt6/Qt6ConfigVersion.cmake:56 (message):
Version 6.8.1 of package Qt6 was requested but an incompatible version was
found: 6.8.1 (64bit). You can pass -DQT_NO_PACKAGE_VERSION_CHECK=TRUE to
disable the version check and force the incompatible version to be used.
There is no guarantee the build will succeed. Use at your own risk. You
can silence this warning by passing
-DQT_NO_PACKAGE_VERSION_INCOMPATIBLE_WARNING=TRUE
Call Stack (most recent call first):
CMakeLists.txt:21 (find_package)

CMake Warning at C:/Qt/6.8.1/mingw_64/lib/cmake/Qt6/Qt6ConfigVersion.cmake:56 (message):
Version 6.8.1 of package Qt6 was requested but an incompatible version was
found: 6.8.1 (64bit). You can pass -DQT_NO_PACKAGE_VERSION_CHECK=TRUE to
disable the version check and force the incompatible version to be used.
There is no guarantee the build will succeed. Use at your own risk. You
can silence this warning by passing
-DQT_NO_PACKAGE_VERSION_INCOMPATIBLE_WARNING=TRUE
Call Stack (most recent call first):
CMakeLists.txt:21 (find_package)

CMake Warning at C:/Qt/6.8.1/mingw_64/lib/cmake/Qt6/Qt6ConfigVersion.cmake:56 (message):
Version 6.8.1 of package Qt6 was requested but an incompatible version was
found: 6.8.1 (64bit). You can pass -DQT_NO_PACKAGE_VERSION_CHECK=TRUE to
disable the version check and force the incompatible version to be used.
There is no guarantee the build will succeed. Use at your own risk. You
can silence this warning by passing
-DQT_NO_PACKAGE_VERSION_INCOMPATIBLE_WARNING=TRUE
Call Stack (most recent call first):
CMakeLists.txt:21 (find_package)

CMake Warning at C:/Qt/6.8.1/mingw_64/lib/cmake/Qt6/Qt6ConfigVersion.cmake:56 (message):
Version 6.8.1 of package Qt6 was requested but an incompatible version was
found: 6.8.1 (64bit). You can pass -DQT_NO_PACKAGE_VERSION_CHECK=TRUE to
disable the version check and force the incompatible version to be used.
There is no guarantee the build will succeed. Use at your own risk. You
can silence this warning by passing
-DQT_NO_PACKAGE_VERSION_INCOMPATIBLE_WARNING=TRUE
Call Stack (most recent call first):
CMakeLists.txt:21 (find_package)

CMake Warning at C:/Qt/6.8.1/mingw_64/lib/cmake/Qt6/Qt6ConfigVersion.cmake:56 (message):
Version 6.8.1 of package Qt6 was requested but an incompatible version was
found: 6.8.1 (64bit). You can pass -DQT_NO_PACKAGE_VERSION_CHECK=TRUE to
disable the version check and force the incompatible version to be used.
There is no guarantee the build will succeed. Use at your own risk. You
can silence this warning by passing
-DQT_NO_PACKAGE_VERSION_INCOMPATIBLE_WARNING=TRUE
Call Stack (most recent call first):
CMakeLists.txt:21 (find_package)

CMake Warning at C:/Qt/6.8.1/mingw_64/lib/cmake/Qt6/Qt6ConfigVersion.cmake:56 (message):
Version 6.8.1 of package Qt6 was requested but an incompatible version was
found: 6.8.1 (64bit). You can pass -DQT_NO_PACKAGE_VERSION_CHECK=TRUE to
disable the version check and force the incompatible version to be used.
There is no guarantee the build will succeed. Use at your own risk. You
can silence this warning by passing
-DQT_NO_PACKAGE_VERSION_INCOMPATIBLE_WARNING=TRUE
Call Stack (most recent call first):
CMakeLists.txt:21 (find_package)

CMake Warning at C:/Qt/6.8.1/mingw_64/lib/cmake/Qt6/Qt6ConfigVersion.cmake:56 (message):
Version 6.8.1 of package Qt6 was requested but an incompatible version was
found: 6.8.1 (64bit). You can pass -DQT_NO_PACKAGE_VERSION_CHECK=TRUE to
disable the version check and force the incompatible version to be used.
There is no guarantee the build will succeed. Use at your own risk. You
can silence this warning by passing
-DQT_NO_PACKAGE_VERSION_INCOMPATIBLE_WARNING=TRUE
Call Stack (most recent call first):
CMakeLists.txt:21 (find_package)

CMake Warning at C:/Qt/6.8.1/mingw_64/lib/cmake/Qt6/Qt6ConfigVersion.cmake:56 (message):
Version 6.8.1 of package Qt6 was requested but an incompatible version was
found: 6.8.1 (64bit). You can pass -DQT_NO_PACKAGE_VERSION_CHECK=TRUE to
disable the version check and force the incompatible version to be used.
There is no guarantee the build will succeed. Use at your own risk. You
can silence this warning by passing
-DQT_NO_PACKAGE_VERSION_INCOMPATIBLE_WARNING=TRUE
Call Stack (most recent call first):
CMakeLists.txt:21 (find_package)

CMake Warning at C:/Qt/6.8.1/mingw_64/lib/cmake/Qt6/Qt6ConfigVersion.cmake:56 (message):
Version 6.8.1 of package Qt6 was requested but an incompatible version was
found: 6.8.1 (64bit). You can pass -DQT_NO_PACKAGE_VERSION_CHECK=TRUE to
disable the version check and force the incompatible version to be used.
There is no guarantee the build will succeed. Use at your own risk. You
can silence this warning by passing
-DQT_NO_PACKAGE_VERSION_INCOMPATIBLE_WARNING=TRUE
Call Stack (most recent call first):
CMakeLists.txt:21 (find_package)

CMake Error at CMakeLists.txt:21 (find_package):
Could not find a configuration file for package “Qt6” that is compatible
with requested version “6.8.1”.

The following configuration files were considered but not accepted:

C:/Qt/6.8.1/mingw_64/lib/cmake/Qt6/Qt6Config.cmake, version: 6.8.1 (64bit)