gcc 3.0 branch fails on libstdc++

[Matt_Conway@i2.com]

Is Head CVS of libstdc++ alone ok, or do I need the head gcc as well - I
would prefer to work with the gcc 3.0 branch for gcc.
If I grab the Head CVS of libstdc++ and stick it in my gcc 3.0 branch in
place of the one that is there, do I have to wait 10 more hours for a full
gcc bootstrap build, or is there any shortcuts I can take?  i.e. can I just
put the new libstdc++-v3 dir in the branch source tree, and run "make
all-target-libstdc++-v3" in my existing buildtree, or will things be all
screwed up? Thanks,

Matt