using gdb with DMD on OS X

[John Stoneham]

I've been messing around with this for a couple of hours, and I'm having difficulty determining whether gdb on OS X can be used with DMD at all (it seems to work ok with gdc). I've tried compiling with both -g and -gc switches.

The first problem is that you can't set breakpoints, with gdb complaining "No source file named" whatever. Using absolute pathnames with the break or directory commands doesn't help:
  
  obijohn:~/projects/d$ gdb hi
  [... copyright notice for gdb ...]
  (gdb) break hi.d:5
  No source file named hi.d.
  Make breakpoint pending on future shared library load? (y or [n]) 
  (gdb) directory ~/projects/d
  Source directories searched: /Users/obijohn/projects/d:$cdir:$cwd
  (gdb) pwd
  Working directory /Users/obijohn/projects/d.
  (gdb) break hi.d:5
  No source file named hi.d.
  Make breakpoint pending on future shared library load? (y or [n]) 
  (gdb) break "~/projects/d/hi.d:5"
  No source file named ~/projects/d/hi.d.
  Make breakpoint pending on future shared library load? (y or [n]) 
  (gdb) break "/Users/obijohn/projects/d/hi.d:5"
  No source file named /Users/obijohn/projects/d/hi.d.
  Make breakpoint pending on future shared library load? (y or [n]) 

Since this problem doesn't exist when compiling with gdc, I'm assuming it's a dmd issue (perhaps relating to the paths used in the symbolic information?). 

If this is a gdb issue, then that's a bigger problem since we're stuck with the version that Apple supplies with XCode (can't update to gdb-6.8 since the gnu sources won't compile on OS X, there's no fink or macports gdb available, and the latest Apple version is 6.3.5). 

Anyone had any luck with this?