eliminate recursive defn: HC <--> WithGhcHc

cleanups & fixes

Obtained-from: Michael Weber <michael.weber@post.rwth-aachen.de>

New make variable: $(WithNofibHc) which defines the Haskell compiler
used to build nofib.

Define $(GHC_INPLACE) in fptools/mk/config.mk.in.  $(WithNofibHc) is
set to $(GHC_INPLACE) by default.

Fix $(MKDEPENDHS) in ghc/lib/std/Makefile.

Automatically detect installed copies of ghc, nhc and hbc and plug
them into the Makefile variables $(GHC), $(NHC) and $(HBC)
respectively.  $(HC) is now supposed to be a generic installed haskell
compiler, which defaults to $(GHC) and can be changed via ./configure
--with-hc=<blah>.

Reorganise and tidy up a few things in config.mk.in.

80-columnify

Make <readline/history.h> a requirement for use of libreadline.

Add hslibs to the default $(ProjectsTo{Install,Build})

Nuke DEBUG_EXTRA once and for all, and make Hugs use the same stack
tags as GHC.

Add checks for readline library (as opposed to headers).

Add a test for libreadline.{a|so}  (include/readline/readline.h
is already tested for.).

Add way 's', for SMP/PThreads

set $(HC) to the inplace ghc driver script.

install (INSTALL_PROGS): a ; too many

Improved on the install rules for libexecs and bins a little
(at least from a Win32 pov - you can now install "happy.bin"
without trouble.)

Support for generating a VERSIONINFO resource that can be pinned
onto generated DLLs and EXEs (Win32 specific.)

Always prepend `#! $(INTERP)' to a script, even if we're BIN_DISTing.
It doesn't do any harm, and means that we can execute the BIN_DIST
version of a script from the build tree, provided it doesn't depend on
any global paths.

Build System Cleanup
--------------------

This commit is intended to clear the way for automatic RPM building.
In particular, the idea is that 'make install' doesn't build anything,
so you can do

	make install prefix=/some/tmp/prefix

to install everything in /some/tmp/prefix, but leave the hardwired-in
install directories the same.

For scripts that depend on the install dir (currently just the GHC
driver and mkdependHS), we now build two versions: <script>-inplace,
which is used for running the script from the build tree, and
<script>, which is the to-be-installed version.

NOTE: binary distributions are now a little bit trickier to build.
You *must* include the line "BIN_DIST=1" in your build.mk if you
intend to make a binary distribution from the current build tree.
This is because certain scripts have to be built differently, and we
don't rebuild them when doing 'make binary-dist' anymore (since 'make
binary-dist' just does a 'make install' with a re-targetted prefix,
just like the RPM builder).

Other changes

	- the binary-dist machinery is now all in fptools/Makefile
	- removed a gratuitous $(package)-$(version) level of
	  directories from the binary distribution.
	- binary distributions are now placed under the package
	  name, rather than fptools/fptools.
	- various other minor cleanups.

--with-ghc-hc is now --with-hc (to be used as the "locally installed
Haskell compiler" for all projects).

typo

cleanup

- Use explicit file modes when installing binaries & scripts (not essential,
  but someone complained about it).

- Use $(INSTALL_SCRIPT) for scripts

Remove some unused things.

oops, forgot to commit this yesterday.

RAWCPP is now '$(CPP) -undef -traditional'.

Typo from Wolfram.

Make use of the $(GhcWithRegisterised) build flag from config.mk.  You
can now get an unregisterised build by *either*

	- setting GhcWithRegisterised to NO in build.mk, or
	- adding 'u' to GhcLibWays.

The former will make all compilations unregisterised, whereas the
latter will require a '-unreg' flag to be passed to the compiler to
get the unregisterised build.

Pass -unreg for unregisterized builds.

DLL install support

Check for presence of winsock.h

a rule or two for building DLLs

Added support for dllwrap options

added a new way (dll) to use when building Prelude DLLs

added HAVE_WIN32_DLL_SUPPORT

Update from autoheader.

Added `timezone' config test.

- define and use *_OPTS for the various sgmltools.
- acknowledge the existence of INSTALL_LIB_SCRIPTS.

GhcReportCompiles: default is NO

Compile the RTS with -O2 and -fomit-frame-pointer.

- compile Happy with -O by default.

Added definition of WithGhcHcVersion (but left commented out, as it's currently
unused.)

Move 4.01 onto the main trunk.