GNOME platform libraries are primarily written in C, and provide a machine-readable description of their API and ABI through GObject-Introspection. This means that C is the “default” platform language, and that the upstream documentation for each library typically references C, but it is possible to use multiple programming languages to write applications for GNOME.
GObject-Introspection allows GNOME to easily provide support for a range of high level languages. In each case, this support is provided by a separate project, which provides its own documentation and support.
Language support typically needs to be installed as part of your development environment. Packages are available for most Linux distributions. In some cases, Flatpak runtime extensions are also available.
Here are the most commonly used programming languages available for writing GNOME applications.
The GNOME project recommends using the C programming language for libraries, as it allows the maximum support across multiple programming languages. Applications, on the other hand, can be written in C or in any programming languages that provides access to the GNOME platform libraries through language bindings.
For more information about applications written in these languages, go to the Welcome to GNOME website.
See the Libraries overview for a list of libraries in the GNOME platform, and their documentation.