2003-07-29 v3ac.tar.bz2
Download that, then perform the following steps:
bunzip2 -c v3ac.tar.bz2 | (cd /where/the/trunk/is/libstdc++-v3; tar xvf -)
touch Makefile.in */Makefile.in
touch configure
configure-target-libstdc++-v3 step, watch for weirdness.