* config/ltmain.m4sh (func_extract_archives,func_extract_an_archive):

* config/ltmain.m4sh (func_extract_archives,func_extract_an_archive):
On darwin, uniq can not take the flags -cd together, thanks to Ralf
for the fix, also ar does not accept N, so we use the fact that
ar x libfoo.a foo.o will always extract the first foo.o in the
archive and we then delete foo.o from the archive, which will also
delete only the first foo.o, then rinse and repeat.