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This is version 0.18 of the Glasgow Haskell compiler.
0.18 is an "internal" release intended *ONLY* for those actually
hacking on the compiler source -- that is, those who *REALLY* know
what they are doing. Anyone else is crazy to use it; anyone who uses
it without keeping a "real" GHC release (0.16 or 0.17) around is
obviously demented.
The chances of a "clean" build are near zero, no matter what Haskell
compiler you build with. Be prepared to utter magic incantations.
(For example, `make reader/ReadPragmas.o
EXTRA_HC_OPTS="-fno-strictness -fno-specialise -fno-case-of-case"'.)
An incomplete "what's new" list:
* Unfoldings across module boundaries. Still v limited.
* Specialisation of overloaded functions. Instances -- not yet.
* Strictness analyser that handles "nested" strictness and does
"absence analysis" as well. Makes Prelude.hi fun to read. Hints:
_N_ = nothing, _A_ = arity, _U_ = update analysis info, _S_ =
strictness (U = unpack, A = absent, L = lazy, S = strict, E = strict
& enumeration type, P = primitive).
* Prelude info no longer horribly built into the compiler (as much).
Manipulating the prelude is not nearly so delicate as it once was.
* Some names have changed: MkChar => C#, MkInt => I#, MkFloat => F#,
MkDouble => D#, MkInteger => J#. (They won't change again...)
* Includes Patrick Sansom's array-based substitution code (much faster
typechecking). (You probably won't see the speedup, though, because
we've spent all the savings on fancier intermodule stuff.)
* We've added a Core "lint" pass, which can be used to check
types/out-of-scope-errors/etc after every Core-to-Core pass. It's
great! -dcore-lint.
* Initial "Native" class support; use "-syslib hbc".
* Lots of compiler code hacked on, for better or worse.
* Lots of gratuitous "trace" messages when running the compiler :-)
Documentation is unchanged since 0.1[67]. There is not one word about
any new features.
We *hope* for a new public release before Christmas (1993).
Will Partain
Keeper of the Bits, AQUA Project
Dated: 93/11/04
E-mail contacts:
glasgow-haskell-bugs@dcs.glasgow.ac.uk (bug reports)
glasgow-haskell-request@dcs.glasgow.ac.uk (general queries)
Anonymous FTP site: ftp.dcs.glasgow.ac.uk:pub/haskell/glasgow. Mostly
mirrored by ftp.cs.chalmers.se and nebula.cs.yale.edu (same
directory). Also: src.doc.ic.ac.uk, in
computing/programming/languages/haskell/glasgow/.
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