3.1 build failure on Solaris 2.6

[Tom Tromey]

I'm building today's gcc 3.1 (from cvs) on Solaris 2.6.
I get this:

 ld: fatal: symbol `expf' is multiply defined:
         (file .libs/libstdc++.lax/libmath.a/stubs.o and file .libs/libstdc++.lax/libmath.a/expf.o);

Any ideas?

I configured with `--enable-threads=posix --enable-languages=java'.
GNU as and GNU ld are in my path but I didn't request them to be used
or do anything special.

Tom