// Dynamic cgo exports appear
					// in the exported symbol table.
					ctxt.dynexp = append(ctxt.dynexp, s)
				}
				l.SetAttrCgoExportDynamic(s, true)
			}

			continue

		case "cgo_dynamic_linker":
			if len(f) != 2 {
				break
			}

			if *flagInterpreter == "" {
				if interpreter != "" && interpreter != f[1] {

used.

In internal mode, cmd/link itself processes all the host object files, in
particular foo.cgo2.o. To do so, it uses the cgo_import_dynamic and
cgo_dynamic_linker directives to learn that the otherwise undefined
reference to sin in foo.cgo2.o should be rewritten to refer to the
symbol sin with version GLIBC_2.2.5 from the dynamic library