DMD has a dependency on old non-maintained version of libstdc++. For gcc it can be fixed by replacing "#include <new.h>" with "#include <new>" in ph.c.
This is urgent because karmic koala 9.10, the next version of ubuntu that will be final in october, has removed libstdc++5 from his officiel repository. So for the moment i can't use dmd.
I tested the last version 1.047 and it works on ubuntu karmic koala 9.10 . So i presume it uses libstdc++6. I put this bug on RESOLVED.