The gold linker has these options to specify how threads would be used by the linker. I am not sure what these options are for but I think its for debugging the linker, maybe.
Are we planning to support these options ?
<snip from manpage>
Run the linker multi-threaded
Do not run the linker multi-threaded
Number of threads to use
Number of threads to use in initial pass
--thread-count-middle COUNT Number of threads to use in middle pass
Number of threads to use in final pass