[Bug lto/48086] bootstrap-lto creates c-common.s with too many sections on x86_64-apple-darwin10

["iains at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48086

--- Comment #14 from Iain Sandoe <iains at gcc dot gnu.org> 2011-03-13 20:54:03 UTC ---
(In reply to comment #13)
> Alright, multiple segments will not work. Or even if they do, it is another
> solution that may or may not work in the future depending on the whims of
> Apple.
> 
> So, a rewrite it will have to be, then.

the response from Nick is a confirmation of both points:

"The suggestion of using different segment names will not work.  Segments
aren't really used in mach-o object files.   All mach-o object files have
exactly one LC_SEGMENT load command.  It is final linked images that support
multiple  LC_SEGMENT load commands.

It is possible to fix this in Xcode 4.x, but I think a solution that just uses
one section for all gcc LTO data (and have your own sub-section scheme) will
work with all darwin assembler versions."

==

I can only hope that the simple_object interface in libiberty will make this
possible without introducing a dependency on libelf (which seems a little OTT
for this relatively small requirement).