- the package DB is a directory containing one file per package
   instance (#723)

 - there is a binary cache of the database (#593, #2089)

 - the binary package is now a boot package

 - there is a new package, bin-package-db, containing the Binary
   instance of InstalledPackageInfo for the binary cache.

Also included in this patch

 - Use colour in 'ghc-pkg list' to indicate broken or hidden packages
  
   Broken packages are red, hidden packages are 
  
   Colour support comes from the terminfo package, and is only used when
    - not --simple-output
    - stdout is a TTY
    - the terminal type has colour capability

 - Fix the bug that 'ghc-pkg list --user' shows everything as broken

Make it clear that Haskell code to be used by other Haskell code
must be built as a package.

Now, adding dyn to $(GhcLibWays) is how shared libs are enabled.
Everything else keys off that, rather than testing
$(BuildSharedLibs).

A few changes bundled together here:

 - Add -package-id flag, like -package but takes an
   InstalledPackageId as an argument (mainly for Cabal)
   (docs to follow)

 - Fix the shadowing behaviour: if we end up with
   two packages with the same name/version that came from
   different package databases, then one will shadow the
   other.  This may mean we have to disable other packages
   that depended on the now-shadowed package.  Lots of
   refactoring to ensure that we can get reasonable diagnostics when
   this happens

<command line>: cannot satisfy -package shadowdep: 
    shadowdep-1-XXX is unusable due to missing or recursive dependencies:
      shadow-1-XXX
    (use -v for more information)

and fix up related cruft

A fine bug report (#3403) demonstrated that we were losing the tail
call property when a complicated pattern match was involved.  After
a bit of investigation I discovered that the culprit was the failure
join-point introduced by the pattern matcher.  It was a zero-argument
thunk, which is not very CPR-friendly, and that interacted badly with
CPR worker/wrapper.

It's easy to fix, the same way that we fix other join points, by supplying
a dummy argument (that is not really passed at runtime.

When checking the interface exported by a hs-boot file against the
Real Thing, I'd failed to check the kind of a type constructor.  If you
get it wrong, the inconsistency leads to all manner of mischief, as 
'wkahl' reports in #3468.

This patch should do the job.

  - tracing facilities are now enabled with -DTRACING, and -DDEBUG
    additionally enables debug-tracing.  -DEVENTLOG has been
    removed.

  - -debug now implies -eventlog

  - events can be printed to stderr instead of being sent to the
    binary .eventlog file by adding +RTS -v (which is implied by the
    +RTS -Dx options).

  - -Dx debug messages can be sent to the binary .eventlog file
    by adding +RTS -l.  This should help debugging by reducing
    the impact of debug tracing on execution time.

  - Various debug messages that duplicated the information in events
    have been removed.

The check for whether a Capability was free was inverted, which harmed
performance for callbacks.

Also add a panic for resurrecting a thread blocked on an exception,
since it should never happen.

Fixes an ASSERTION failure with concprog001, -threaded -debug, +RTS -N2

This has no effect with static libraries, but when the RTS is in a
shared library it does two things:

 - it prevents the function from being exposed by the shared library

 - internal calls to the function can use the faster non-PLT calls,
   because the function cannot be overriden at link time.

Should help to fix the build on OpenBSD (together with a corresponding
patch to libraries/base).

When there are some absolute include dirs, don't create arguments
like -Ilibraries/base//usr/local/include.

I need this fix for injecting the iconv include dir (which is
/usr/local/include on OpenBSD) into the build of libraries/base.

rolling back:

Mon Aug  3 11:44:13 BST 2009  Simon Marlow <marlowsd@gmail.com>
  UNDO: Add -r option to darcs-all, and remove push-all (#3375)
  Contributed by: seliopou@gmail.com
      
  This patch modifies darcs-all to have feature parity with push-all by
  recognizing two new options.
  
      * -i, equivalent to --ignore-failure in push-all
      * -r <repo>, specifies the remote repository darcs commands will use
  
  Some example commands:
  
  Get the libraries from a repository of your choosing. This is useful
  when working with a git mirror:
  
      $ ./darcs-all -r http://darcs.haskell.org get
  
  Pull changes. Used to be:
  
      $ ./push-all --pull http://darcs.haskell.org
  
  Is now:
  
      $ ./darcs-all -r http://darcs.haskell.org pull
  
  Or to use the default remote of the ghc repository:
  
      $ ./darcs-all pull

    M ./darcs-all -79 +33
    A ./push-all

We need to change a dependency on
    pkg-inplace
to
    pkg-$abihash
when installing