Qt for Windows - Building from Source

This page describes the process of configuring and building Qt for Windows. To download and install a pre-built Qt for Windows, follow the instructions on the Getting Started with Qt page.

Step 1: Getting the Sources

Qt sources can be installed in Qt Online Installer. Source packages are also available through Git, as archives in the Qt Account (commercial users), and on download.qt.io (open-source users).

If you install the sources through Qt Online Installer, they will be available in the Qt installation directory, for instance C:\Qt\6.8.2\Src.

If you downloaded the source archive, extract it to a directory of your choice, for instance C:\dev\Qt\src.

Step 2: Installing Build Requirements and Set Environment

To build Qt from sources you need a build environment with a supported compiler and various build tools.

Build Tools

The executables cmake.exe, ninja.exe, and python.exe must be available in your build environment. Add the respective directory to your PATH environment variable.

Compilers

The following compilers and configurations are supported in Qt 6.8:

QDoc Dependencies

QDoc uses Clang to parse C++ code. If you wish to build QDoc manually, refer to Installing Clang for QDoc for specific build requirements.

Qt GRPC and Qt Protobuf Dependencies

Qt GRPC and Qt Protobuf require installing gRPC and Protobuf packages. You can find the installation instructions for the packages in the Example of installation for Windows using vcpkg.

Setting the Environment

For MSVC, do one of the following:

• Run the vcvarsall.bat:

  "C:\Program Files\Microsoft Visual Studio\2022\Professional\VC\Auxiliary\Build\vcvarsall.bat" amd64

• Search on the Windows search bar for the VS Native Tools command prompt.

For Mingw-w64: Add Mingw-w64 to PATH environment variable:

Set PATH=C:\qt\tools\mingw1120_64\bin;%PATH%

Step 3: Building the Qt Libraries and Tools

To configure your build, create a build directory and run the configure.bat script in this directory:

mkdir C:\dev\qt-build
cd C:\dev\qt-build
C:\dev\Qt\src\configure.bat

By default, Qt is configured for installation in the C:\Qt\Qt-major.minor.patch directory, where the major.minor.patch triplet represents the Qt version being built. This can be changed by using the -prefix option. See the list of Qt Configure Options to tweak further.

Then build the libraries and tools:

cmake --build . --parallel

Period after --build means current folder.

After building, you need to install the libraries and tools in the desired path (unless you enabled a developer build:

cmake --install .

Step 4: Building Your Application

After Qt is installed, you can start building applications with it.

If you work from the command line, consider adding the Qt tools to your PATH environment variable as follows:

set PATH=C:\Qt\Qt-major.minor.patch\bin;%PATH%

If you plan to use Qt from an IDE, you need to register the Qt version explicitly there. For Qt Creator, see Qt Creator: Adding Qt Versions.