Hello,

I remember a few months ago when I stumbled across a piece of code
using target_gdbarch, and I couldn't remember what this global was,
and what the different was with gdbarch.  I eventually found the
original discussion again

(http://sourceware.org/ml/gdb-patches/2008-08/msg00358.html)

but I think a comment would be nice.  I'm finally writing one today.
Does this look accurate?

2009-05-06  Joel Brobecker  <brobecker@adacore.com>

        * gdbarch.h (target_gdbarch): Add comment documenting this global.

-- 
Joel