These files are build instructions for the Arch Linux build system how to create an installable icingadb package.
To install on Arch Linux, use your favourite AUR helper or build manually with:
git clone https://github.com/bodsch/aur-icingadb icingadb
cd icingadb
makepkg --cleanbuild --noprogressbar --clean --force --noconfirm
makepkg --printsrcinfo > .SRCINFO