From ArchWiki

OpenWRT is a project to generate custom systems for embedded devices, but it also allows to generate images running for x86 and UML mode


Basic devel tools are needed, base-devel contains most of them, but you probably have missing wget and maybe asciidoc although this last one I cannot confirm how 'dependency' it is. You will notice on run


If you are willing to use UML target, you need aur's glibc-static