GitLab

  - There are still some #ifdefs for choosing between i386, x86_64,
      linux, darwin and other OS's.
  - Also reformat SPARC.RegInfo to remove some of the visual noise.

This should fix the build with GHC 6.6

  Darwin 9.6.0 + GCC 4.0.1 doesn't understand "msync". 
  I think "sync" means the same thing.

The function FunDeps.grow was not doing the right thing when type equality
constraints were involved.  That wasn't really its fault: its input was
being filtered by fdPredsOfInsts.

To fix this I did a bit of refactoring, so that the (revolting) fdPredsOfInsts
is now less important (maybe we can get rid of it in due course).  The 'grow'
function moves from FunDeps to
	 Inst.growInstsTyVars
	 TcMTType.growThetaTyVars
	 TcMType.growTyVars

The main comments are with the first of these, in
Note [Growing the tau-tvs using constraints] in Inst.

Push to the branch if conflict free.

We were zeroing the wrong memory

It was getting confused by lines like:
 # 9 "C:\Temp\/ghc620_0/ghc620_0.hc" 1

Fixes trac #2872.

Fix Trac #3011 by temporarily making it only a WARN if we assign twice
to the same unification variable.

On Windows, we end up doing something like
    rsync c:/build/ghc-6.10.1-unknown-mingw32.tar.bz2 haskell.org:dist
and it thinks that it is meant to get the file from the host called "c".
Now we just do
    rsync ghc-6.10.1-unknown-mingw32.tar.bz2 haskell.org:dist
so rsync understand what we mean.

When cleaning or installing, we need to ignore what $stage is, and
just clean/install all the libraries.

If the module was found in multiple hidden packages, we list them all.

Could not find module `Data.Generics':
  it is a member of the hidden package `base-3.0.3.0'
  it is a member of the hidden package `syb'
  Use -v to see a list of the files searched for.

So we can use this abstraction elsewhere in the RTS

Patch from sthibaul. Fixes trac #2883.