Stephen Pitts
I'm once again trying to build Hat; this time it's on Jaguar with GHC 5.04.2. I got past the first problem; as someone else pointed on in the archives, HFS+ has some interesting case sensitivity issues, so I had to invoke ghc to compile Hat.hs by hand.
In the next release, we have renamed files to avoid case insensitivity problems.
After that, the build seemed to be going OK until I got this message: /usr/local/src/hat-2.00/script/hat-trans -trusted -prelude PreludeTracing.hs
Fail: Cannot parse in .hx file PreludeBasic line (Var "seq",Value {args=-1, fixity=R, priority=0, letBound=True})
The problem is that "args=-1" is being lexed internally as the token sequence: args =- 1. In fact the field value should really have been written in the first place as either "args=(-1)" or "args = -1", and the fault is with the compiler-derived show instance for this datatype. Although ghc-5.04.1 had this bug, but was supposed to have been fixed in 5.04.2. Indeed 5.04.2 works fine under Linux here, so I have no idea why you are seeing the problem recur under MacOS-X. So the best answer I can suggest is to check whether you really do have ghc-5.04.2, and if so, enquire with GHC central about why it appears to omit this bugfix. You could also try upgrading to 5.04.3 (a MacOS-X binary bundle is not yet available, but you could build it from source). Incidentally, we plan to release hat-2.02 very soon, but it probably won't make any difference to this particular problem, because it is your copy of ghc, not Hat, which is at fault. Regards, Malcolm