Merge C++ conversion into trunk (0/6 - Overview)

[Mike Stump]

On Aug 15, 2012, at 4:59 AM, Richard Guenther wrote:
> and debugging becomes a nightmare (hello gdb people!)

> (gdb) call debug_tree (0x7ffff67fa5e8)
> Cannot resolve function debug_tree to any overloaded instance

Inquiring minds want to know if:

macro define debug_tree(A) ((tree)A)

makes the above work if you put it into gdbinit.in?  If yes, then, I think for now we should add such lines for every non-overloaded function, I too like using hex constants from dumps.  Oh, or, maybe we just add a debug_tree(long) overload just to satisfy gdb.