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We only use it for "compiler" sources, i.e. not for libraries.
Many modules have a -fno-warn-tabs kludge for now.

We now make use of the ghc-packages file when making the haddock index.

For now, turn off dynlibs when validating

Duncan says that Cabal isn't guaranteed to be warning-free.

Old versions don't understand -Wno-error=inline

Based on a patch from David Terei.

Some parts are a little ugly (e.g. defining things that only ASSERTs
use only when DEBUG is defined), so we might want to tweak things a
little.

I've also turned off -Werror for didn't-inline warnings, as we now
get a few such warnings.

We were getting
    InstallExtraPackages="YES    "

This changes the new code generator to make use of the Hoopl package
for dataflow analysis.  Hoopl is a new boot package, and is maintained
in a separate upstream git repository (as usual, GHC has its own
lagging darcs mirror in http://darcs.haskell.org/packages/hoopl).

During this merge I squashed recent history into one patch.  I tried
to rebase, but the history had some internal conflicts of its own
which made rebase extremely confusing, so I gave up. The history I
squashed was:

  - Update new codegen to work with latest Hoopl
  - Add some notes on new code gen to cmm-notes
  - Enable Hoopl lag package.
  - Add SPJ note to cmm-notes
  - Improve GC calls on new code generator.

Work in this branch was done by:
   - Milan Straka <fox@ucw.cz>
   - John Dias <dias@cs.tufts.edu>
   - David Terei <davidterei@gmail.com>

Edward Z. Yang <ezyang@mit.edu> merged in further changes from GHC HEAD
and fixed a few bugs.

They all have redundant uses of fromIntegral, but are no under
GHC HQ control.

This is a follow-on to Simon's patch yesterday, developed
with him.  It cleans up the computation of how packages
are installed, and installs the right ones.

Put it back on when my patch is applied to the containers repo.
(the one that removes two refuable lambdas)

Instead of the ghc-stage and ghc-stage2-package files in a package, we
now have a list of these in ghc.mk.  There are other similar lists (of
boot-packages and non-installable packages), so this is not too bad,
and is simpler.

While poking around in the top-level ghc.mk file I spotted various
opportunities to clean up and re-order some of the cruft that has
accumulated over time.

This fixes a problem with commands like gzip, where if $GZIP is exported
in the environment, then when make runs a command it'll put the Makefile
variable's value in the environment. But gzip treats $GZIP as arguments
for itself, so when we run gzip it thinks we're giving it "gzip" as an
argument.

Makes it easier to do unregisterised validate runs

dblatex with miktex under msys/mingw can't build the PS and PDF docs,
and just building the HTML docs is sufficient to check that the
markup is correct, so we turn off PS and PDF doc building when
validating.

This checks that hackage would accept the packages.
Currently warnings are printed, but don't result in failure.

They're now fixed to not generate those warnings

Overwriting means we lose the -m64 on OS X 64.

This removes a burden from developers, and I can't remember an
occasion where it would have caught a regression.

This should stop us ending up without HsColour'ed sources on some
platforms.

We also now tell Cabal where to find HsColour, rather than it finding
it itself.