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splitting support on x86_64

Initialise foreign exports from GNU C __attribute__((constructor)) functions
in the stub C file, rather than from __stginit_ functions.
For non-profiling ways, leave out __stginit_ alltogether.

Mac OS X: fixes to the splitter (rev. 1.24.6.1 on the branch)

the splitter now supports linux/powerpc

Better fix for previous from Ian Lynagh.

Apply the fix from

   [ 1015205 ] ghc-split fails to quote path when used as regex

namely escape backslashes in the pathname $Tmp_prefix before using it
as a regex.  The fix doesn't look like it solves the general case, but
it'll do for now.

More Mac OS X-specific gcc 3.3 fixes

merge to stable

Object Splitting for Mac OS X.

MERGE TO STABLE (... but not today, I have to test it first)

perl made uglier to work around the perl 5.7/5.8 bug documented at
http://bugs6.perl.org/rt2/Ticket/Display.html?id=1760 and illustrated
by the seg fault of perl -e '("x\n" x 5000) =~ /(.*\n)+/'

MERGE TO STABLE

Comment dubious hack.

Strip out \r on Windows. This should not be necessary as Perl should
read in text mode on a text mounted volume (under Cygwin).

sigh, the split script broke due to changes in gcc on FreeBSD (again).

Get 'dis /tmp offa ma back, it stops me doin' Windows hack!

Recent versions of gcc seem to output strings as sequences of .bytes,
which the splitter didn't recognise.  The result was that constant
strings were being duplicated in all the split .o files (again... this
is a particularly fragile "optimisation" and breaks on a regular basis).

HP-PA fixes from Eric Schweitz <schweitz@nortelnetworks.com>

A string constant block can consist of multiple .string/.ascii
directives.  The sparc-specific code in this file already handled this
properly, but the x86 code was wrong.

New Driver
==========

Most things work now, so I'm committing this for a shake down.
Doubtless there'll be some breakage but things should be back to
normal by the end of the week.

NOTE: GHC 4.06 won't work to build this driver at the moment, due to a
bug in its parser.  I'll commit a workaround shortly.

There are several improvements here:

	- the driver is written in Haskell, so is allegedly
	  more maintainable than the previous one.  It's a bit shorter,
	  at any rate.

	- the package system has been generalised, so that eg.
	  the RTS is a package, as is GMP and the prelude.  Packages
	  are now configured via a configuration file, package.conf.
	  Two versions of package.conf are automatically generated by
	  PackageSrc.hs, one for ghc-inplace and one for the installed ghc.

	- So that we only have to build the driver once, there's some
	  special hackery to deal with locations of utilities, and
	  other configuration stuff:

	  ghc now has a -B option, which is used in a similar way
	  to gcc's.  eg.

		ghc -B/home/blah/fptools

	  will run ghc in-place in the specified fptools tree, using
	  /home/blah/fptools/ghc/utils/mkdependHS to find mkdependHS
	  for example.  ghc-inplace is now a small shell script that
	  simply invokes the above.  Whereas

		ghc -B/usr/local/lib/ghc-4.07

	  also works, for an installed copy of ghc in
	  /usr/local/lib/ghc-4.07.

	- the mangler, object splitter and GC stats gatherer are separate
	  scripts in subdirectories of ghc/driver.  ghc-asm.lprl and
	  ghc-split.lprl have been copied in the CVS repository to maintain
	  the history (fingers crossed; I've never done this before)


Other notes:

	- Java support isn't there yet.  Andy: don't update for the time
	  being until I can sort this.

	- Windows support is also broken, but will be fixed in due course.

Make object file splitting simpler, in preparation for conversion to
the new driver.

The "inject split markers" phase is now omitted, instead we generate
the split markers directly.

Driver: also removed now-defunct -fpedantic-bottoms flag.

sparc-sun-solaris2 uses .LLC<n> to refer to local string constants.

fixup problem with '.' at the front of a local label.

Miraculously, the same bug exists on sparc-sun-solaris2.

Fix splitting on i386-unknwon-linux: string constants were being
duplicated in each object, leading to large increases in binary
sizes.

partain 1.3 changes to 960626

Initial revision

Alleged post-Sansom 0.27+ code

AIX/RS6000 patches

Make object file splitting simpler, in preparation for conversion to
the new driver.

The "inject split markers" phase is now omitted, instead we generate
the split markers directly.

Driver: also removed now-defunct -fpedantic-bottoms flag.

sparc-sun-solaris2 uses .LLC<n> to refer to local string constants.

fixup problem with '.' at the front of a local label.

Miraculously, the same bug exists on sparc-sun-solaris2.

Fix splitting on i386-unknwon-linux: string constants were being
duplicated in each object, leading to large increases in binary
sizes.

AIX/RS6000 patches

partain 1.3 changes to 960626

Alleged post-Sansom 0.27+ code

Initial revision