176 lines
10 KiB
Markdown
176 lines
10 KiB
Markdown
# Installing CMake
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{% hint style='tip' %}
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Your CMake version should be newer than your compiler. It should be newer than the libraries you are using (especially Boost). New versions work better for everyone.
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{% endhint %}
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If you have a built in copy of CMake, it isn't special or customized for your system. You can easily install a new one instead, either on the system level or the user level. Feel free to instruct your users here if they complain about a CMake requirement being set too high. Especially if they want < 3.1 support. Maybe even if they want CMake < 3.17 support...
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#### Quick list (more info on each method below)
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Ordered by author preference:
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* All
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- [Pip][PyPI] (official, sometimes delayed slightly)
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- [Anaconda][] / [Conda-Forge][]
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* Windows
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- [Chocolatey][]
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- [Scoop][]
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- [MSYS2][]
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- [Download binary][download] (official)
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* MacOS
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- [Homebrew][]
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- [MacPorts][]
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- [Download binary][download] (official)
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* Linux
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- [Snapcraft][snap] (official)
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- [APT repository][apt] (Ubuntu/Debian only) (official)
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- [Download binary][download] (official)
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## Official package
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You can [download CMake from KitWare][download]. This is how you will probably get CMake if you are on Windows. It's not a bad way to get it on macOS either, but using `brew install cmake` is much nicer if you use [Homebrew](https://brew.sh) (and you should). You can also get it on most other package managers, such as [Chocolatey](https://chocolatey.org) for Windows or [MacPorts](https://www.macports.org) for macOS.
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On Linux, there are several options. Kitware provides a [Debian/Ubunutu apt repository][apt], as well as [snap packages][snap]. There are universal Linux binaries provided, but you'll need to pick an install location. If you already use `~/.local` for user-space packages, the following single line command[^1] will get CMake for you [^2]:
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{% term %}
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~ $ wget -qO- "https://cmake.org/files/v3.17/cmake-3.17.0-Linux-x86_64.tar.gz" | tar --strip-components=1 -xz -C ~/.local
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{% endterm %}
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If you just want a local folder with CMake only:
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{% term %}
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~ $ mkdir -p cmake-3.17 && wget -qO- "https://cmake.org/files/v3.17/cmake-3.17.0-Linux-x86_64.tar.gz" | tar --strip-components=1 -xz -C cmake-3.17
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~ $ export PATH=`pwd`/cmake-3.17/bin:$PATH
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{% endterm %}
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You'll obviously want to append to the PATH every time you start a new terminal, or add it to your `.bashrc` or to an [LMod] system.
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And, if you want a system install, install to `/usr/local`; this is an excellent choice in a Docker container, for example on GitLab CI. Do not try it on a non-containerized system.
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{% term %}
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docker $ wget -qO- "https://cmake.org/files/v3.17/cmake-3.17.0-Linux-x86_64.tar.gz" | tar --strip-components=1 -xz -C /usr/local
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{% endterm %}
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If you are on a system without wget, replace `wget -qO-` with `curl -s`.
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You can also build CMake on any system, it's pretty easy, but binaries are faster.
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## CMake Default Versions
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Here are some common build environments and the CMake version you'll find on them. Feel free to install CMake yourself, it's 1-2 lines and there's nothing "special" about the built in version. It's also very backward compatible.
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### Windows
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[][chocolatey]
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[][MSYS2]
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[][MSYS2]
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Also [Scoop][scoop] is generally up to date. The normal installers from CMake.org are common on Windows, too.
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### MacOS
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[][homebrew]
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[][homebrew-cask]
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[][macports]
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Homebrew is quite a bit more popular nowadays on macOS, at least according to Google Trends.
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### Linux
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#### RHEL/CentOS
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[][centos]
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[][centos]
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[][centos]
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The default on 8 is not too bad, but you should not use the default on 7. Use the EPEL package instead.
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#### Ubuntu
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[](https://launchpad.net/ubuntu/trusty/+source/cmake)
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[](https://launchpad.net/ubuntu/xenial/+source/cmake)
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[](https://launchpad.net/ubuntu/bionic/+source/cmake)
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[](https://launchpad.net/ubuntu/disco/+source/cmake)
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[](https://launchpad.net/ubuntu/eoan/+source/cmake)
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You should only use the default CMake on 18.04+; it's an LTS release with a pretty decent minimum version!
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#### Other
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[](https://pkgs.alpinelinux.org/packages?name=cmake&branch=v3.11)
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[][repology]
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[][repology]
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[][repology]
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[][repology]
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[][repology]
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[][repology]
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[][repology]
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[][repology]
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[][repology]
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### General tools
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[][repology]
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[][PyPI]
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[][Conda-Forge]
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[][Anaconda]
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Just `pip install cmake` on many systems. Add `--user` if you have to. ManyLinux1 (old pip or OS) gets CMake 3.13.3.
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### CI
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| Distribution | CMake version | Notes |
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|---------------|---------------|-------|
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| [TravisCI Xenial](https://docs.travis-ci.com/user/reference/xenial/#compilers-and-build-toolchain) | 3.12.4 | Mid November 2018 this image became ready for widescale use. |
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| [TravisCI Bionic](https://docs.travis-ci.com/user/reference/bionic/#compilers-and-build-toolchain) | 3.12.4 | Same as Xenial at the moment. |
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| [Azure DevOps 18.04](https://docs.microsoft.com/en-us/azure/devops/pipelines/agents/hosted?view=azure-devops#use-a-microsoft-hosted-agent) | 3.12.4 | |
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| [GitHub Actions 18.04](https://help.github.com/en/actions/automating-your-workflow-with-github-actions/software-installed-on-github-hosted-runners#ubuntu-1804-lts) | 3.12.4 | Mostly in sync with Azure DevOps |
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### Full list
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[][repology]
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Also see [pkgs.org/download/cmake](https://pkgs.org/download/cmake).
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## Pip
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[This][PyPI] is also provided as an official package, maintained by the authors of CMake at KitWare. It's a rather new method, and might fail on some systems (Alpine isn't supported last I checked, but that has CMake 3.8), but works really well when it works (like on Travis CI). If you have pip (Python's package installer), you can do:
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```term
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gitbook $ pip install cmake
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```
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And as long as a binary exists for your system, you'll be up-and-running almost immediately. If a binary doesn't exist, it will try to use KitWare's `scikit-build` package to build, which currently can't be listed as a dependency in the packaging system, and might even require (an older) copy of CMake to build. So only use this system if binaries exist, which is most of the time.
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This has the benefit of respecting your current virtual environment, as well.
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{% hint style='info' %}
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Personally, on Linux, I put versions of CMake in folders, like `/opt/cmake312` or `~/opt/cmake312`, and then add them to [LMod]. See [`envmodule_setup`][envmodule_setup] for help setting up an LMod system on macOS or Linux. It takes a bit to learn, but is a great way to manage package and compiler versions.
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[envmodule_setup]: https://github.com/CLIUtils/envmodule_setup
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{% endhint %}
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[^1]: I assume this is obvious, but you are downloading and running code, which exposes you to a man in the middle attack. If you are in a critical environment, you should download the file and check the checksum. (And, no, simply doing this in two steps does not make you any safer, only a checksum is safer).
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[^2]: If you don't have a `.local` in your home directory, it's easy to start. Just make the folder, then add `export PATH="$HOME/.local/bin:$PATH"` to your `.bashrc` or `.bash_profile` or `.profile` file in your home directory. Now you can install any packages you build to `-DCMAKE_INSTALL_PREFIX=~/.local` instead of `/usr/local`!
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[repology]: https://repology.org/project/cmake/versions
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[LMod]: http://lmod.readthedocs.io/en/latest/
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[apt]: https://apt.kitware.com/
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[snap]: https://snapcraft.io/cmake
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[PyPI]: https://pypi.org/project/cmake/
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[chocolatey]: https://chocolatey.org/packages/cmake
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[scoop]: https://github.com/ScoopInstaller/Main/blob/master/bucket/cmake.json
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[MSYS2]: https://packages.msys2.org/base/mingw-w64-cmake
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[anaconda]: https://anaconda.org/anaconda/cmake
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[conda-forge]: https://github.com/conda-forge/cmake-feedstock
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[download]: https://cmake.org/download/
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[homebrew]: https://formulae.brew.sh/formula/cmake
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[homebrew-cask]: https://formulae.brew.sh/cask/cmake
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[macports]: https://ports.macports.org/port/cmake/summary
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[centos]: https://rpms.remirepo.net/rpmphp/zoom.php?rpm=cmake
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