[Bug go/46986] Go is not supported on Darwin

[afb at users dot sourceforge.net]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46986

--- Comment #19 from Anders F Björklund <afb at users dot sourceforge.net> 2012-02-15 22:08:59 UTC ---
(In reply to comment #17)
> I think that now the only thing which will need to change in the Go frontend
> proper is using otool instead of objcopy in libgo/Makefile.am.

The otool was simple enough, but the other go_export issues still remain.
And there are some new issues with ucontext being deprecated on Mac OS X.