Barney Stratford:
this one built and installed fine on Mac OS X 10.6 :). Interesting, I thought there were still problems there. I assume that's a 32-bit version. The problems manifest themselves only when you compile a 64-bit GHC.
That's incorrect. The 32-bit version is only partially working. GHCi dies with a bus error (after package loading) and various features that need the interpreter/dynamic loading (such as TH and annotations) die under certain circumstances. Disclaimer: I didn't actually test this with 6.12.1RC1, but with 6.13. However, there shouldn't be any difference as I am not aware of any 6.12.1-specific Mac fixes. Manuel PS: I am chasing these bugs, but I don't have a lot of time for that at the moment, they are tricky bugs, and my Mac-fu is still pretty limited. So, if anybody else likes to have a go with gdb and dtrace, please do so.