what is openwrt-gl-sft1200 fr?

This repository is a mirror of the official OpenWrt project. According to its description, it exists purely for reference and is not used for direct check ins. Pull requests can still be submitted here, but they get merged into staging trees first and then flow into the real OpenWrt repository, rather than being applied to this copy directly. OpenWrt itself is a Linux based operating system built for embedded devices, most commonly WiFi home routers. Instead of shipping a single fixed firmware image the way a router manufacturer normally would, OpenWrt gives you a fully writable filesystem along with a package manager, so you can add, remove, and reconfigure software on the device well beyond what the original vendor firmware allowed. For most people the simplest way to use OpenWrt is to download a ready made firmware image through the project's online Firmware Selector tool, matched to their specific router model, and follow the install instructions linked from there. For anyone who wants more control, such as extra packages or a custom toolchain, the OpenWrt wiki's download page has additional options. Building OpenWrt from source is aimed at more advanced users and developers. It requires a Linux, BSD, or macOS system with a case sensitive filesystem, plus a list of standard build tools. The basic process is to update and install package feeds, run a configuration menu to choose your target device and desired packages, then run a single build command that downloads sources, builds a cross compile toolchain, and compiles the Linux kernel and chosen applications for the target hardware. The wider OpenWrt project is split across several related repositories for things like its web interface, community contributed packages, and routing specific packages. It is licensed under GPL-2.0, and support is available through an official forum, chat channels, and a developer mailing list for those wanting to contribute patches.