Took some time to take a quick look at Arch. They split zoneinfo off into tzdata package. glibc then depends on that.

The PKGBUILD for the file makes use of a package() section, which calls make install and installs some config files etc. At the moment I don't know what is missing/added to prevent zoneinfo files being installed.

tzdata pulls in files from iana, including leap seconds, and creates the files as part of its package() process. Looks relatively straight forward to replicate. https://projects.archlinux.org/svnto...ackages/tzdata