Add rules so library sources can be obtained from fptools/hslibs.

Fix bug in 'deriving Enum' reported by Ralf Hinze:
   data T = A | B deriving Enum
failed, requiring instance Ord T, because code generated
for enumFromThen required Ord.  We now derive just fromEnum
and toEnum, and let the Report's defaults do the rest.

... and of course these files might come in handy ...

First bits o' functional dependencies - just the syntax and related
datatypes, plus started moving some of the static checks from the
renamer (where we don't know about fundeps) to later in the typechecker.

Eliminate warnings for uninitialised srt fields in constructors.

Eliminate some warnings.

Add hslibs to the default $(ProjectsTo{Install,Build})

Allow a for-all type inside a usage annotation:

	__u - (forall a. type)

[This actually simply inolved making rnHsType a bit more permissive.]

The particular way this shows up right now is a bug that Keith is working
on, but in general it should be legal.

Make StgHugs use the same naming scheme as GHC does for class +
instance machinery.

Add machinery to do Z-encoding/decoding of names extracted from
interface files.

Make the ELF object loader work again.  It seemed to have suffered
slight bitrot over the past couple of months.  Fix various minor bugs.

Track a small change in interface file syntax.

Make Printer.c print tagged-unboxed stack sections in a decent way
now that Alastair-style stack tags have been abandoned.

Implement foreign import dynamic.

Make it so that a class decl generates default method decls
for every method, not just for the ones that the user supplies
default-methods for.

GHC will never call these default-default methods, because
when it finds an instance decl with no defn for a method,
*and* the class decl doesn't have a user-programmed default
method, it whips up a new default method for that instance
decl so that the error message is more informative than
the default-default method would be.

But Hugs isn't so smart, and wants to call something from
the class decl.

This change required fiddling with more than I expected.  Sigh.

Simon

error.h -> stgerror.h

error.h --> stgerror.h

This commit adds the new RTS option `-xc', which prints the current
cost-centre stack to stderr whenever an exception is raised.  This is
intended to be a debugging tool, to help trace those "Prelude.head:
empty list" errors that are so frustrating to find.

`-xc' is only available for programs compiled with -prof, and you
probably want -auto as well to get useful information.

This is currently experimental; it would be better if it only
displayed the info for *uncaught* exceptions, but this is harder to
implement.

This commit also makes an OFTEL-inspired extension to the RTS option
space.  Since we've almost run out of options, `-x' is now reserved
for `extended' options.  `-xc' is the first of these, but that leaves
'-x[0-9A-Zabd-wyz]' still to be used!  The prefix `-xx' is reserved
for future extension.

GHC bits for new library organisation.

rename error.h to stgerror.h

Rename error.h to stgerror.h

slight cleanup

Pass flag -ltermcap as link option for test -lreadline.

Incremental cleanups & improvements to the I/O subsystem

- Initial fix for problems caused by partial writes
  to non-blocking file descriptors.  To see this bug,
  run ghc/tests/programs/life_space_leak through a pipe.

- remove FILEOBJ_FLUSH, it allegedly has the same meaning
  as FILEOBJ_WRITE.  This fixes a buf in openFd: it erroneously didn't
  set FILEOBJ_FLUSH on writeable file descriptors.

- some ANSIfication

import wibble for hugs

Remove debugging printf in findQualifier().

HUGS_VERSION ++

Change STDCALL to STDKALL to avoid conflict with a header file.

Simon's driver changes (should have committed these a while back)

* Add -no-rules to first simplifier pass

* Move CSE pass

Missing dollar on USER_WAY_NAMES and OPTS

Add a comment

Express sequence in terms of foldr

Better error message when trying to derive classes for
existentially-quantified data constructors.

And a general slight tidy up in TcDeriv

Slight wibble on polytype syntax, going in the direction of allowing
for-alls in more places.  This one lets you say
	forall a. forall b. a->b

Report decent error for top-level defn of a qualified name

Add documentation on pattern guards

Don't guess where the installation directory is.  Instead,
read it from the STGHUGSDIR env var at startup.

Disable debug printing in setDefaultLibDir.

Add clean target, and change hugslib to all.

Fix bug in threadDelay, where the delay ticks could end up negative.

Fixing setDefaultLibDir to work with relative use of hugs binary.

Adding method for packaging up binary distribution of Hugs.

wibble

- remove -dcore-lint
- add Happy-generated files to MAINTAINER_CLEAN
- replace $(GHC_DRIVER_DIR)/ghc with $(GHC)