https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79869
--- Comment #3 from Claudiu Zissulescu <claziss at gmail dot com> --- DOC is string that shortly describes an machine dependent option. This string is used to throw an warning/error when the underling option is not available for a specific architecture, which can be arcem, arc700, arc6xx or archs. The DOC definitions are in arc/arc-options.def The arches name are defined in arc/arc-arches.def
