Build LibreMesh
Recommended methods
Firmware Selector
Download the firmware for your device via the Firmware Selector.
https://firmware-selector.libremesh.org
The Firmware Selector request a firmware build via an ASU (online ImageBuilder) instance.
ImageBuilder
Assemble prebuilt kernel, packages and device information to produce the firmware
lime-sdk
Build packages using the OpenWrt SDK and firmware images using the OpenWrt ImageBuilder
Buildroot
Compile everything: tools, toolchain, kernel, packages, firmwares
Other methods
List of imagebuilder frontends on the OpenWrt wiki