Fix it Good'n'Proper.

Remove lots of junk from db2ps.sh, and make it find db2dvi properly.

(I'll merge it)

Changed "_" variable prefix to "c" (for "config", "constant", or
whatever you like). This should enable building from CVS with GHC <4.07.

Keep gcc -Wall happy

* -#include's arg needs not be separate anymore.
* Nuke leading and trailing spaces around option arguments.

Use "$@" instead of $* in shell script, the latter one doesn't handle
spaces in arguments correctly. Heaven knows who invented this wierd rules.

Descend into include subdir first to create a config.h, which is
needed in later subdirs.

Fixed xref to Storable docs

Synch unfoldr's signature in export list with reality

Fixed "filterFB" RULE

*** please merge ***

Get rid of hand-maintained HSrts.def, and generate it automatically.

markHugsObjects() and lookupSection(): don't use debugging versions
of macros module(), name(), tycon(), etc, even when debugging.
Also, in lookupSection(), return immediately when not in combined mode.
Together, these dramatically reduce the cost of GC in Hugs (by about
a factor of 15 for nofib/real/anna).

Minor mods to make fully-optimised builds of Hugs work again.

Changes to make DietHEP.dll usable from Visual Basic:
* Export DH_LoadLibrary and DH_GetProcAddress using stdcall, not ccall.
* Append all messages to a logfile, diet_hep_logfile.txt, for debugging.

* -syslib => -package
* mkdependHS => ghc -M

*** please merge ***

* Mentioned CTypesISO
* Synched comments about MutableArray with reality

*** please merge ***

Removed explicit usage of hslibs/docs, it belongs to
ghc/docs/set. (untested)
*** please merge ***

*** NO NEED TO MERGE WITH 4.07 ***
    (but it would do no harm)

* Improve an error message when overlapping instance
  declarations are present.  Carl Witty reported this
  infelicitous message.  The problem arises for this code:

	class Foo a
	class (Foo a) => Bar a
	
	data Dat a = Dat
	
	instance Foo (Dat a)
	instance Foo (Dat Integer)
	
	instance Bar (Dat a)

  The instance decl for Bar should say

	instance Foo (Dat a) => Bar (Dat a) 

  because the overlapping instance decls for Foo can't
  be resolved (or at least might vary depending on how
  a is instantiated).

*** MERGE WITH 4.07 ***

* ParseIface.y should reject newtypes with no
  definition:
	newtype T a ;
  The rest of the compiler falls over if it sees such a thing.

*** MERGE WITH 4.07 ***

* The divide by zero check in the constant-folding
  rules was testing the numerator not denominator!
  (For Float and Double.)

Add greencard support.

As suggested by SimonM, moved an overview over the three components of the FFI
into the FFI document included as Chapter 7 into the GHC user guide.

Open questions:

* How can I make cross references to the doc in hslibs/?  There are already
  references to hslibs sections in other parts of ghc's user guide, but they
  are not correctly resolved when I generate html from the sgml files.

* There is now a (little) overlap with material in 6.5 (GHC Language Features:
  The foreign interface).  I would say, we could actually leave this as it is,
  as 6.5 goes on to describe GHC specifics.

fix -fno-asm-mangling flag

Force binds with coreBindsSize after every simplifier iteration.
Significantly reduces space use, especially with -O.  This could
probably be done more cleanly.

remove duplicates from the list of ways, so that eg. ghc -prof -prof
is legal.

Don't try to finalize DEAD_WEAKs.  This fix has been sitting in my
tree for so long, I can't remember whether it was a real bugfix or
just a cleanup, oh well.

Set the context switch flag to zero when running a new thread; the
timer interrupt now initiates a context switch.

context switch on a timer interrupt.

remove ToDo about mkdependHS and -osuf.

mkdependHS doesn't understand the -o option anymore; instead it grokss
ghc's -osuf option.  We never really used this, and it behaves
strangely when mixed with -s, but at least now it doesn't conflict
with GHC's -opt<blah> options.

- print the version number as x.yy.z (i.e. replace ", patchlevel z"
with ".z"), but omit the .z if z == 0.

- add --numeric-version flag which prints x.yy.z without the verbage.

- fix -optCrts (was being overriden by -optC)
- fix -osuf with -split-objs
- fix -odir

* makeForeignObj => newForeignObj

* Tried to make type mapping table look less strange, but this
  succeeded only a little bit. Could somebody else have a look?

oops, backout accidental commit

Updated the building from .hc section.

*MERGE*

Time fixes from Michael Weber <michael.weber@post.rwth-aachen.de>:

  * `toClockTime' previously didn't honor the `tz' field of a
    `CalendarTime', which led to time warping when applying

      => (toUTCTime (toClockTime ... (toUTCTime (toClockTime someTime) ... )))

    continuously.

    Now it accepts at least <local>- and UTC-encoded `CalendarTime's
    (TODO: test, whether all timezones work) and converts them
    correctly to <secs from epoch>-format (which is always UTC, as one
    might have guessed).

  * `addToClockTime' now works.

    Previously, `tz' seconds were added(!) when used like:

      => addToClockTime noTimeDiff someTime

    which is clearly wrong.
    Now, the following (hopefully) always holds

      => someTime == (addToClockTime noTimeDiff someTime)

  * `diffClockTimes' works correctly, and is the dual to
    `addToClockTime', i.e.

      => diff == ((addToClockTime diff someTime) `diffClockTimes` someTime)

    should now hold for all diff, someTime

    Previously, it reports ugly diffs at {min,hour,day,...}-breaks,
    for example:

      => "2000/06/18 01:00 UTC"
            `diffClockTimes` "2000/06/17 23:00 UTC" == 1 day, -22 hours

    whereas now it emits "7200 secs". This number can be converted
    with `normalizeTimeDiff' to "2 hours".

  * added `normalizeTimeDiff', which calculates year, month, days,
    etc. out of an unnormalized `TimeDiff' (generated by
    `diffClockTimes', for example)

  * `formatTimeDiff': added the missing "%c" case. The
    format is proprietary, though... Is there a nicer one?

ignore -no-link-chk for backwards compat.

remove tests subdir

Give 'ghc -E' the traditional behaviour: the output is dumped to
stdout.  The new driver also generates <file>.cpp.

Changed SUBDIRS from users_guide to set (the former doesn't build any more
except as part of the latter).