dwarf_add_AT_location_expr(3) on FreeBSD
The text cf44c0cde8b7, 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 an attribute descriptor for a location expression