[Darwin] Patch: enable linkonce support for Darwin

[Joseph S. Myers]

On Thu, 29 Jan 2004, Matt Austern wrote:

> Whew!  I hope I've answered most of the major questions here.  Now the 
> patch.

I don't see any documentation in this patch of either the command-line
option or the target macros.  If the new command-line option can readily
be tested it needs a testcase as well, otherwise some explanation of how
it has been tested and why this can't be included in the testsuite.

-- 
Joseph S. Myers
jsm@polyomino.org.uk