CMake is a cross-platform, open-source build system generator. For full documentation visit the CMake Home Page and the CMake Documentation Page. The CMake Community Wiki also references useful guides and recipes.

CMake is maintained and supported by Kitware and developed in collaboration with a productive community of contributors.

CMake is distributed under the OSI-approved BSD 3-clause License. See LICENSE.rst for details.

• Microsoft Windows
• Apple macOS
• Linux
• FreeBSD
• OpenBSD
• Solaris
• AIX

Other UNIX-like operating systems may work too out of the box, if not it should not be a major problem to port CMake to this platform. Please post to the CMake Discourse Forum to ask if others have had experience with the platform.

You can build CMake as any other project with a CMake-based build system: run an already-installed CMake on this source tree with your preferred generator and options. Then build it and install it.

To build the documentation, install Sphinx and configure CMake with -DSPHINX_HTML=ON and/or -DSPHINX_MAN=ON to enable the "html" or "man" builder. Add -DSPHINX_EXECUTABLE=/path/to/sphinx-build if the tool is not found automatically.

To run the test suite, run ctest in the CMake build directory after building. See the CMake Testing Guide for details.

You need to have a C++ compiler (supporting C++11) and a make installed. Run the bootstrap script you find in the source directory of CMake. You can use the --help option to see the supported options. You may use the --prefix=<install_prefix> option to specify a custom installation directory for CMake. Once this has finished successfully, run make and make install.

For example, if you simply want to build and install CMake from source, you can build directly in the source tree:

$ ./bootstrap && make && sudo make install

Or, if you plan to develop CMake or otherwise run the test suite, create a separate build tree:

$ mkdir build && cd build
$ ../bootstrap && make

By default the bootstrap script configures CMake to build with vendored dependencies. However, CMake does not vendor OpenSSL. To bootstrap in a minimal environment, disable use of OpenSSL:

$ ./bootstrap -- -DCMAKE_USE_OPENSSL=OFF

There are two ways for building CMake under Windows:

1. Compile with MSVC from VS 2015 or later. You need to download and install a binary release of CMake. You can get these releases from the CMake Download Page. Then proceed with the instructions above for Building CMake with CMake.

2. Bootstrap with MinGW under MSYS2. Download and install MSYS2. Then install the required build tools:

   $ pacman -S --needed git base-devel mingw-w64-x86_64-gcc
   

   and bootstrap as above.

If you have found a bug:

1. If you have a patch, please read the CONTRIBUTING.rst document.
2. Otherwise, please post to the CMake Discourse Forum and ask about the expected and observed behaviors to determine if it is really a bug.
3. Finally, if the issue is not resolved by the above steps, open an entry in the CMake Issue Tracker.

See CONTRIBUTING.rst for instructions to contribute.