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short-description: Simple getting started guide |
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# The Absolute Beginner's Guide to Installing and Using Meson |
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This page is meant for people who are new to using Meson and possibly |
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even to compiling C and/or C++ code in general. It is meant to contain |
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one simple way of getting your build environment up and running. If |
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you are more experienced and have your own preferred way of installing |
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and using development software, feel free to use that instead. This |
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guide only deals with Linux, Windows and macOS platforms. If you use |
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some other platform, such as one of the BSDs, you probably already |
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know how to install development tools on it (probably better than we |
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do, even). |
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There are three phases to getting a development environment running. |
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1. Installing a compiler toolchain |
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2. Installing Meson |
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3. Creating a project and building it |
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## Installing a compiler toolchain |
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### Linux |
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All Linux distributions provide easy access to development tools. |
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Typically you need to open a terminal and execute one command, which |
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depends on your distro. |
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- Debian, Ubuntu and derivatives: `sudo apt install build-essential` |
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- Fedora, Centos, RHEL and derivatives: `sudo dnf install gcc-c++` |
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- Arch: `sudo pacman -S gcc` |
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### Windows |
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The most common development toolchain on Windows is Visual Studio, |
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which can be downloaded from [the Visual Studio web |
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site](https://visualstudio.microsoft.com/). Select the Community |
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version unless you have bought a license. |
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 |
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Download the installer and run it. When you are given a list of things |
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to install, select *Desktop development with C++*. This installs both |
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a C and a C++ compiler. |
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 |
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Once the installer finishes the compiler toolchain is ready to use. |
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### macOS |
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On macOS the development toolchain must be installed via the Mac app |
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store. Search for an app called XCode and install it. |
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 |
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*Note:* Installing XCode is not sufficient by itself. You also need to |
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start XCode' GUI application once. This will make XCode download and |
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install more files that are needed for compilation. |
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## Installing Meson |
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### Linux |
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Installing Meson is just as simple as installing the compiler toolchain. |
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- Debian, Ubuntu and derivatives: `sudo apt install meson ninja-build` |
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- Fedora, Centos, RHEL and derivatives: `sudo dnf install meson ninja-build` |
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- Arch: `sudo pacman -S meson` |
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### Windows |
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Meson provides a standard Windows `.msi` installer that can be |
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downloaded from [the Releases |
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page](https://github.com/mesonbuild/meson/releases). |
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 |
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Download and run it to install all the necessary bits. You can verify |
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that your installation is working by running the Visual Studio |
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developer tools command prompt that can be found in the start menu. |
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 |
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You should be able to run both `meson` and `ninja` and query their |
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versions. |
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 |
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### macOS |
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Due to the way Apple has set things up, getting macOS working is a bit |
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more complicated. The first thing you need to do is to install the |
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newest version of Python 3 [from the project's web |
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site](https://www.python.org/downloads/mac-osx/). |
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 |
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Once you have a working Python you can install the necessary bits |
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using Python's Pip package manager. |
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pip install --user meson ninja |
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This will install the necessary files in your home directory, but |
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sadly they are not directly usable. You need to add the directory they |
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are written to in the system's `PATH` environment variable so the |
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programs can be used directly from the terminal. This requires editing |
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a text configuration file. |
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The correct file to edit depends on which shell you are currently |
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using. If you have an old macOS install it is probably Bash and the |
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file you need to edit is `.bash_profile`. If, on the other hand, you |
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have a new macOS install then you are probably using Zsh and the file |
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to edit is `.zshrc`. In either case the file should be in your home |
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directory. |
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For Bash the line you need to add is this: |
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PATH=$PATH:/Users/username/Library/Python/3.9/bin |
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whereas for Zsh it is this: |
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export PATH=$PATH:/Users/username/Library/Python/3.9/bin |
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In both case you need to change the values for `username` and `3.9`. |
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The former needs to be substituted with your Unix username while the |
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latter needs to contain the actual Python version you installed. |
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Once this is done close the terminal application and start it again. |
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Now you should be able to run the `meson` command. |
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 |
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## Running Meson |
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Start a terminal application. On Windows you have to use the Visual |
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Studio Developer Tools Command Prompt as discussed above, because the |
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compilers are only available in that terminal. You also need to change |
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into your home directory (Linux and macOS terminals start in the home |
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directory by default). |
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cd \users\username |
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Create a new directory to hold your project. |
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mkdir testproject |
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cd testproject |
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Use Meson to create and build a new sample project. |
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meson init --name testproject --build |
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This will create a project skeleton for you and compile it. The result |
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is put in the `build` subdirectory and can be run directly from there. |
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build/testproject |
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 |
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The project is now ready for development. You can edit the code with |
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any editor and it is rebuilt by going in the `build` subdirectory and |
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executing the `meson compile` command. |
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