Add way 's', for SMP/PThreads

Junk removal

Fix crashes in re_search.  Several other functions in this file need
fixing too.

Add foreign import/export implementations for x86 stdcall convention.

Make parser notice calling conventions on f-i and f-x declarations,
check they are supported on the platform Hugs is compiled on.  Pass
them all the way through the code generator to the interpreter.

Allow f-i/f-x decls to omit the calling convention, in which case
ccall is used.  Remove calling convention from all such decls
in the Prelude so it will work on any platform.

markStablePtrTable: correctly handle case when one stable ptr refers
to an indirection to an item referred to directly by a second
stable ptr (I think!).

wibble

Foreign imports that use ByteArrays now need to be marked as being 'unsafe.'

Fix documentation installing in a binary dist.

FFI wibble:

* disallow the use of {Mutable}ByteArrays in 'safe' foreign imports.
* ensure that ForeignObjs live across a _ccall_GC_.

Adding a axiomatic testing framework library to help test Hugs and GHC
libraries.

Here is the example for the test of concat.

test_concat = testRules "concat" [
	do (xss :: [[ALPHA]]) <- var "xss"
	   concat xss <==> foldr (++) [] xss
	]

xss here ranges over various rendering of list of list,
including bottom and lists containing bottom.

<==> uses a small piece of compiler/interpreter specifics to
allow testing for

	error "" ... <==> ... error "" ===> Pass

* Completion of foreign import and foreign export for x86 ccall
  convention.  f-i's and f-x's can pass and return
  Char Int Word Addr StablePtr Float and Double.

* Significant cleanups and infrastructure improvements.
  Characterise functions by (instruction set, calling convention)
  pair where necessary, since that's what counts.

  Moved foreign export code into rts/ForeignCall.c.
  Should now be in a good position to implement x86 stdcall
  convention.

wibble

Cleanup of the foreign import code.  Also allow StablePtrs
to be passed back and forth.

made writeErrString__ f.i. unsafe

Dotted the i's

Add some missing ticky macros.

Eliminate those annoying "unexpected lazy BHing required" messages
during ticky-ticky profiling.

Micro-optimisation: don't need to test for an empty queue in a
BLACKHOLE_BQ, now that we're distinguishing BLACKHOLE and
BLACKHOLE_BQ.  Shortens the update code by a couple of instructions.

Back out prev. commit which POSIXified getClockTime() - non-POSIX calls
really are superior (better resolution.)

Adding final diffs between Hugs98 (Jan99) and Hugs98 (Sep99)
manually to STG Hugs.

Adding a generic version of universal call that
only works for specific argument patterns.

It allows ports to work on the Hugs Prelude immeduately,
even if univeral_call_c_<os/specific> is not ported.

Also, commented out (longstanding?) bug with incorrect call
to setCurrModule.

use PUSH_ON_RUN_QUEUE macro instead of (slightly less efficient)
inline version.

ASSERT that the tso link field is empty before pushing it on the end
of a queue.

Increase default cutoff limit from 16 to 60.  nofib/real/anna
won't compile even with this value set to 50.  Presumably the
same problem afflicts Hugs98-Sept98 ?

Remove debugging export of ST(..), which causes failures in nofib.

Wibble.

Make typeVarsIn non-static since interface.c needs to see it.

Change CFunDescriptor to match new foreign import implementation.

Reimplement back-end for foreign import (calling out).

Return to a cleaned-up version of Alastair's callfun.S,
wherein an architecture and calling-convention specific
piece of assembly code is used to construct arguments and
then call the specified function, under the direction of
a type descriptor string.

Defined an interface to this function (universal_call_c)
which I hope will work regardless of 32-or-64 bitness,
endianness and calling convention.

Current implementation is for x86-linux only.

* Time.CalendarTime.ctMonth's type should be Month (was Int.)
* fixed Time.addToClockTime - the original implementation was
  completely wrong (thanks to George Russell for indirectly
  reporting the bug.)
* Added the non-std Time.noTimeDiff, handy when you want to do
  calendar calculations, e.g.,

            ct <- getClockTime
            print (toUTCTime (addToClockTime noTimeDiff{tdMonth=1} ct))

* many 'foreign import' decls were not marked as unsafe, even though they
  were passing out MutableByteArray and ByteArray vals. Fixed.

The fix to ignore error() cases when doing CPR analysis exposed a
problem with the Void type.  A function that always constructs a void
result was converted to w/w, but the worker was producing an unboxed
tuple with 0 components.  Not good.

Fixed so that constructing a void gives CPR value Top.  This is OK
because we won't really be constructing a void each time, we will be
returning a pointer to a shared void cell.

Adding diffs between Hugs98 (Jan99) and Hugs98 (Sep99)
manually to STG Hugs.

Brings in large change to typechecking sub-system.

Adding diffs between Hugs98 (Jan99) and Hugs98 (Sep99)
manually to STG Hugs.

These are the changes to input.c, with minor tweeks to
connect.h and parser.y to make this work.

Adding diffs between Hugs98 (Jan99) and Hugs98 (Sep99) manually to STG Hugs.

Updating all copyright messages to the same as Hugs98.

Changing order of check for use of DLL for dynamic linking.
(Under cygwin, we still want to use DLL's).

Added basic support for foreign export dynamic.

Many aspects of it are still broken:
* Only supports x86-linux.
* The range of allowable types is small: Char Int Float Double
  Addr and Word.
* Adjustor thunks are never freed.
* Returning Doubles or Floats doesn't work at all.

I expect to fix some of these shortly.  foreign import also
needs redoing, so it can accept any number of arguments of
any type.

Also:
* Fixed setRtsFlags in Evaluator.c to make it endian-independent.
* Fixed raisePrim in Evaluator.c so things like division by zero,
  array index errors, etc, throw an exception instead of
  terminating StgHugs.  raisePrim is renamed makeErrorCall.

Add macros for two-register call/return convention, for experimentation.

set $(HC) to the inplace ghc driver script.

Swap ticky column order