Mike,
I just created PR28837 with the patch to prune.exp that
prunes the ld64 warnings. I have only tested this with the
core gcc at the moment because I can't get...
make -k check RUNTESTFLAGS='--target_board "unix{,-m64}"'
...to work from the toplevel of the darwin_obj directory...
http://gcc.gnu.org/ml/gcc/2006-08/msg00454.html
I'll probably file a PR on that as well as soon as someone
who really understands the dejagnu testsuite framework can
confirm that it really is a bug (don't see how it can't be
one though).
Jack