Remove some non-portable uses of /bin/test, from Christian Maeder.

Various updates and improvements.

-ddump-hi-diffs shouldn't turn off recompilation checking

add filename to some error messages on mingw32

Mention that type splices are not implemented; MERGE to STABLE

Hopefully fix more compilation problems with various versions of GHC

Make this build with GHC < 6.03 again

Remove SMP-only fields from STM data structures from non-SMP builds

Allow calls to __alloca in the prologue on mingw32 (previously only
allowed for cygwin32, I guess it hasn't happened for a while).

Check for reserved stack space blown.

Profiling doesn't require -fvia-C any more.  Also, I optimistically
removed -fvia-C from all the other ways except unreg.

Fix crash in LDV profiling on the HEAD

add .svn/ to list of ignorable dirs

Make GHC.depanal store the module graph in the session again.  Fixes
ghc -M.

Fix a regex bug

Make more error messages from the downsweep into ErrMsg exceptions.

oops, fix updating the module graph

Fix some reporting of errors in the GHC API: errors during the
downsweep were thrown as exceptions; now they're reported via the
(Messages->IO ()) callback in the same way as other errors.

getModuleInfo no longer prints anything on stdout.  It does ignore
error messages and return Nothing, however - we should fix this and
return the error messages at some point.

The ErrMsg type can now be thrown as an exception.  This can be a
convenient alternative if collecting multiple error messages isn't
required.  We do this in the downsweep now.

Fix the names of a few fields.

Update STM implementation for SMP builds

MERGE TO STABLE

Put back in a missing case for higher-rank types. When the
definition is
	a) non-recursive
	b) a function binding
	c) lacks a type signature
we want to *infer* a perhaps-higher-rank type for the RHS,
before making a monomorphically-typed Id for the LHS.

E.g. 	f = \(x :: forall a. a->a) -> (x True, x 'c')

This case got lost in the transition to 6.4

tc194 tests it

Fix Linker on Windows: there was one more place where we had to check
for ".ctors" sections.

Fix url

something very strange happened with previous commit; try again

Fix threaded RTS with older gcc versions. (merge rev. 1.215.2.10)

Move RTS_SUPPORTS_THREADS into RtsConfig.h

implement lockClosure properly

isObjectLinkable: don't return True for an empty linkable

If hsc_lang is HscNothing, produce an empty linkable.

Don't write the interface in JustTypecheck mode

Yet another wibble to the GHCi top-level interaction story; avoid dup error messages

typo

More details about the representation of types after type checking.

Simplify and improve the Capability-passing machinery for bound
threads.

The old story was quite complicated: if you find a thread on the run
queue which the current task can't run, you had to call
passCapability(), which set a flag saying where the next Capability
was to go, and then release the Capability.  When multiple
Capabilities are flying around, it's not clear how this story should
extend.

The new story is much simpler: each time around the scheduler loop,
the task looks to see whether it can make any progress, and if not, it
releases its Capability and wakes up a task which *can* make some
progress.  The predicate for whether we can make any progress is
encapsulated in the (inline) function ANY_WORK_FOR_ME(Condition).
Waking up an appropriate task is encapsulated in the function
threadRunnable() (previously it was in two places).

The logic in Capability.c is simpler, but unfortunately it is now more
closely connected with the Scheduler, because it inspects the run
queue.  However, performance when communicating between bound and
unbound threads might be better.

The concurrency tests still work, so hopefully this hasn't broken
anything.

Print only the result of a bind stmt

- scheduleDetectDeadlock() should invoke GarbageCollect() via
  scheduleDoGC(), which collects the Capabilities first.

- scheduleDoGC() doesn't need the Capability.  Also, it appears that
  there was an out-of-bounds array access in here.

- add printThreadQueue(), useful from gdb.

- fix a couple of warnings.

rename exportsFromAvail

Further GHCi wibbles

a) Don't print the value of a 'let'
b) Only one error message for 'print id'

Dead code (HEAD only)

Fix what "standard class" means

	MERGE to STABLE

The Report's definition of defaulting (Section 4.3.4) defines a "standard class" to be
one defined by the Prelude or a standard library.  GHC was omitting the "..or a standard
library" part; and it even omitted the Prelude classes Monad and Functor.
This commit fixes the bug by adding

	Random, RandomGen,
	Monad, MonadPlus, Functor

to the classes defined as "standard".