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Windows wibbles

A start on the GHC API:

Flesh out the GHC module so that it can replace CompManager.  Now, the
clients that used CompManager consume the GHC API instead (namely
Main, DriverMkDepend, and InteractiveUI).  Main is significantly
cleaner as a result.

The interface needs more work: in particular, getInfo returns results
in the form of IfaceDecls but we want to use full HsSyn and
Id/DataCon/Class across the boundary instead.

The interfaces for inspecting loaded modules are not yet implemented.

wibble

update list of files to be touched during bootstrapping

remove redundant dependency

Mac OS X: Make bindist work with dynamic libraries

MERGE TO STABLE

__hscore_getFolderPath(): Don't limit ourselves to shell32.dll, look up
  shfolder.dll too.

Merge to STABLE.

Update the -fno-cse flags

Complete the transition of -split-objs into a dynamic flag (looks like I
half-finished it in the last commit).

Also: complete the transition of -tmpdir into a dynamic flag, which
involves some rearrangement of code from SysTools into DynFlags.

Someday, initSysTools should move wholesale into initDynFlags, because
most of the state that it initialises is now part of the DynFlags
structure, and the rest could be moved in easily.

[Windows only]
for System.Directory / Compat.Directory functionality that probes the OS
for local details re: misc user directories, perform late binding of
SHGetFolderPath() from shell32.dll, as it may not be present.
(cf. ghc-6.4's failure to operate on Win9x / NT boxes.) If the API isn't
there, fail with UnsupportedOperation.
Packages.readPackageConfigs: gracefully handle excns from getAppUserDataDirectory.

Merge to STABLE.

Import wibble

Fix stage-2 build

Undo rev. 1.6, these changes shouldn't have been in this tree

Flags cleanup.

Basically the purpose of this commit is to move more of the compiler's
global state into DynFlags, which is moving in the direction we need
to go for the GHC API which can have multiple active sessions
supported by a single GHC instance.

Before:

$ grep 'global_var' */*hs | wc -l
     78

After:

$ grep 'global_var' */*hs | wc -l
     27

Well, it's an improvement.  Most of what's left won't really affect
our ability to host multiple sessions.

Lots of static flags have become dynamic flags (yay!).  Notably lots
of flags that we used to think of as "driver" flags, like -I and -L,
are now dynamic.  The most notable static flags left behind are the
"way" flags, eg. -prof.  It would be nice to fix this, but it isn't
urgent.

On the way, lots of cleanup has happened.  Everything related to
static and dynamic flags lives in StaticFlags and DynFlags
respectively, and they share a common command-line parser library in
CmdLineParser.  The flags related to modes (--makde, --interactive
etc.) are now private to the front end: in fact private to Main
itself, for now.

merge rev. 1.6.2.1, simplified slightly:

  Initialise a CostCentreStack by generating SIZEOF_CostCentreStack
  (gotten from the C compiler) zeros, padded to the nearest word.
  Improves on the previous fixes for unpredictable padding (see comment).

Add SIZEOF_CostCentreStack

Clarify -main-is documentation

Fix a few CCCS that should be W_[CCCS] that I just noticed.  I suspect
that heap-profiling STM code might run into difficulties in 6.4.

Fix +RTS -xc, which is broken in 6.4.

Rearrange the fields of CostCentreStack to leave no (or less) room for
arbitrary padding decisions by C compilers.

Re-clarify hs-boot docs

Follow-up fix to this:
  ghc --make should check for a module graph that
  contains a hs-boot file with no corresponding parent module

Namely, instead of complaining, just add the parent module.

	Merge to STABLE

Clarify hs-boot docs

minor to fix to (still probably broken) stglint

ghc --make should check for a module graph that
  contains a hs-boot file with no corresponding parent module

	Merge to STABLE

Buglet in compiling hs-boot files
	We should make GlobalIds not LocalIds

	Merge to STABLE

Comments

Add note about GLUT from Claus (actually I have very little idea if
this is correct or not - Sven, if you have a chance to take a look
that would be great.)

Localise the binder for the nested defn in LiberateCase,
to avoid name clashes between top-level names.
Discovered by Laszlo.

	Merge to STABLE

Further to previous patch: only create the user database if we're modifying

Be a bit less eager about creating the user database: now we only
create it when explicitly asked to use it with --user.

Fix InstalledPackageInfo link

Remove Main module from exported-modules field

```-------------------------------
 	Two GADT error-reporting bugs
	----------------------------------

	Merge to STABLE
```

missed file...

1.  Bug in kind-checking for GADTs; turned out to be in
    isOpenTypeKind on KindVars

....

[mingw only]setProgName():
  robustify by looking for the last '/' or '\\' in argv[0].
  My copy of 'gdb' likes to use a mixture of the two, which causes a
  fatal error when trying to debug libHSrts_p.a. Other process-invoking
  apps/shells might be equally wavering when it comes to the use of slashes.

Merge to STABLE.

all modules from GHC are listed in exposed-modules field

TARGET->HOST

----------------------------------
 	Two GADT error-reporting bugs
	----------------------------------

	Merge to STABLE

1.  Bug in kind-checking for GADTs; turned out to be in
    isOpenTypeKind on KindVars

2.  Missed check for the return type for GADTs

package.conf.in is changed to the new syntax. The list of exposed modules still
have only one module GHC

A very rough start at the GHC API, here so that others can look and
modify it.