dwarf_add_AT_ref_address(3) on FreeBSD
The text 1504556c7ec8, as FreeBSD 12.0-RELEASE, FreeBSD 11.4-RELEASE, FreeBSD 11.3-RELEASE, FreeBSD 11.2-RELEASE, FreeBSD 11.1-RELEASE, FreeBSD 11.0-RELEASE shipped it.
create a reference class attribute descriptor