Export Ref, newRef, readRef, writeRef from the Prelude.

Minor bugfixes for concurrency support in Hugs.

Evaluator.c: correctly handle case of entering a black hole.
Prelude.hs:  better exception catching in forkIO and primRunIO
GC.c:        (revert_dead_CAFs): don't ASSERT(0) on a dead CAF
             (I don't know why this assert was there)

In hugs, implement ThreadId(..), instance Eq/Ord ThreadId,
and forkIO.  Add deleteAllThreads() to scheduler so Hugs can
clean up after evaluation.

A version of the Prelude with some extra (primitive) functions
exported for use by various system libraries.

Merging in the various changes between Sep99 Hugs and Nov99 Hugs.

cacheprof-related nano-wibble

Remove unused FiniteSet stuff.

Added basic support for MVars: data MVar, and newMVar, putMVar and
getMVar.

sync output

sync output

Couple of fixes for -accept-output.

Pull in _regPrelude if we're profiling.

Fix queue corruption bug in unblocking of threads blocked on I/O.

Set version to 991115, as this seems a stable point.

Wibbles to make get a fully-optimised build to work.  (We've been
building debug versions for a v. long time now).

Delete optimiser.c (the simplifier) and all supporting bits and
pieces.

Decide to use or not use readline depending on the top-level
(fptools) configure machinery.

Add checks for readline library (as opposed to headers).

Add a test for libreadline.{a|so}  (include/readline/readline.h
is already tested for.).

Install control-c signal handler in interpreter() after call to
initialize, since that calls startupHaskell, which trashes previous
signal settings.

Modify to avoid warning message in test log

Document no deriving for existentials

Add existential-deriving test

Initial revision

Fix REG_Su optimised code for update frames (only affects machines
with a REG_Su, such as Sparc).

This change provided by Alastair Reid is a bunch of wibbles which fix
some severe performance problems in the copy of the Pretty library
distributed with Hugs-Sept99.

The problems show up when making heavy use of hsep (eg printing large
numbers of comma separated lists which tend to run over the end of
line).  The problems manifest themselves as the infamous "control
stack overflow" and seem to be due to the generation of large
Int thunks that look something like this:

  80 - 4 - 1 - 1 - 3 - 1 - ... -1

(There may be a few +'s in there too but -'s predominate.)

Small test fixes

Report slow-entry counts in ticky-ticky

1.  rts_eval_ now returns Killed if evaluator is interrupted,
    so act accordingly.
2.  RevertCAFs is on by default.

Add prototype for interruptStgRts().

Re-instate interrupted stuff.  If the scheduler finds the interrupted
flag to be set, it calls deleteThread() on all the runnable and
blocked threads, wakes up any main thread clients that were waiting,
and then either

	(a) returns, in the UP case
	(b) waits for more work, in the SMP case.

wibble: Remove irrelevant #ifdef (DOUBLES).

Print float/double literals correctly in error messages.

grrr, back out changes that snuck in with previous commit.

Integer divMod now uses the native GMP method.  The PrimOp was already
there, it just wasn't being used.

Remove old Spix stuff, replace with shiny new support for Julian's
CacheProf stuff.  yay!

avoid those annoying -0.00 times.

oops, use the correct type

forgot type in parameter list

Adding Int8,16,32,64 into Hugs.

These changes are based on the current (Sep99 Hugs) version of Word.

The GHC parts should be unchanged.