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Default currently NO.

Validate passed with GhcDynamic=YES on x86/Linux here.

The compiler is currently slower on x86 when linked -dynamic,
because the GC inner loop has been adversely affected by -fPIC, I'm
looking into how to fix it.

We weren't getting sharedlibs on amd64/FreeBSD because of this

They are now guaranteed to be YES

rather than assuming that all GNU ar's do.
Apparently OpenBSD's older version doesn't.

From Maxime Henrion <mhenrion@gmail.com>

Rather than trying to handle tabs with sed portably, we just use tr to
remove them before we start.

- Defines a DTrace provider, called 'HaskellEvent', that provides a probe
  for every event of the eventlog framework.
- In contrast to the original eventlog, the DTrace probes are available in
  all flavours of the runtime system (DTrace probes have virtually no
  overhead if not enabled); when -DTRACING is defined both the regular
  event log as well as DTrace probes can be used.
- Currently, Mac OS X only.  User-space DTrace probes are implemented
  differently on Mac OS X than in the original DTrace implementation.
  Nevertheless, it shouldn't be too hard to enable these probes on other
  platforms, too.
- Documentation is at http://hackage.haskell.org/trac/ghc/wiki/DTrace

We now just call gcc to get the dependencies directly

We only use dlltool on Windows, and this way we don't require that
the user has it installed.

Patches from Goetz Isenmann <info@goetz-isenmann.de>, slightly updated
for HEAD (the method for configuring platforms in configure.ac has
changed).

This means we can remove some conditional stuff from the Makefiles,
and means the testsuite doesn't have to work out whether or not it's
on Windows.

To get ticky profiling you still have to compile with -ticky (for
those modules that you want to profile), but you can link with either
-debug or -ticky.

We now do all the hard work in a bindistprep subdirectory, and just move
the result to the root directory. This way we can delete anything in
bindistprep/ without worrying about deleting anything important.

Haddock uses TcRnDriver.tcRnGetInfo, which is only available if
GHCI is built. Set HADDOC_DOCS to NO if GhcWithInterpreter is NO,
and disable the haddock build if HADDOC_DOCS = NO.

This fixes at least one problem: libHSffi-ghc<version>.so wasn't being
cleaned, because $(dyn_libsuf) wasn't defined while cleaning.

- Needed to get arch-dependent options, eg, on Snow Leopard

 - 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

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